/* ============================================================
       TOKENS — quarry palette: cement, basalt, marble fleck, brass, verdigris
       ============================================================ */
    :root {
      --stone-50: #F1ECE2;
      --stone-100: #E7DECC;
      --stone-200: #D9CBAD;
      --basalt-900: #16171A;
      --basalt-800: #212226;
      --basalt-700: #2C2D32;
      --brass-500: #AD8348;
      --brass-400: #C9A469;
      --verde-600: #54614C;
      --verde-500: #6C7A62;
      --fleck-50: #FAF7EF;
      --ink-800: #2A271F;
      --ink-600: #524C3F;
      --ink-400: #8A8371;
      --line: rgba(42, 39, 31, 0.14);
      --line-dark: rgba(250, 247, 239, 0.14);
      --radius: 2px;
      --serif: 'Playfair Display', 'Times New Roman', serif;
      --sans: 'Be Vietnam Pro', -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--sans);
      background: var(--stone-50);
      color: var(--ink-800);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }
    :focus-visible {
      outline: 2px solid var(--brass-500);
      outline-offset: 3px;
    }
    @media (prefers-reduced-motion: reduce) {
      * {
        animation: none !important;
        transition: none !important;
      }
    }

    .eyebrow {
      font-family: var(--sans);
      font-weight: 700;
      font-size: 0.72rem;
      letter-spacing: 0.22em;
      text-transform: uppercase;
      color: var(--brass-500);
      display: flex;
      align-items: center;
      gap: 0.6em;
    }
    .eyebrow::before {
      content: '';
      width: 22px;
      height: 1px;
      background: var(--brass-500);
    }

    /* ============================================================
       TERRAZZO SWATCH — the signature texture, generated in pure CSS.
       Two variants: dark base (hero/dark sections) and light base (dividers/cards)
       ============================================================ */
    .swatch-dark,
    .swatch-light {
      background-repeat: repeat;
    }
    .swatch-dark {
      background-color: var(--basalt-900);
      background-image:
        radial-gradient(circle at 12% 18%, var(--fleck-50) 5px, transparent 5px),
        radial-gradient(circle at 46% 8%, var(--brass-400) 6px, transparent 6px),
        radial-gradient(circle at 78% 22%, var(--verde-500) 4px, transparent 4px),
        radial-gradient(circle at 92% 58%, var(--fleck-50) 3px, transparent 3px),
        radial-gradient(circle at 30% 52%, var(--brass-400) 3.5px, transparent 3.5px),
        radial-gradient(circle at 62% 68%, var(--fleck-50) 6px, transparent 6px),
        radial-gradient(circle at 8% 78%, var(--verde-500) 5px, transparent 5px),
        radial-gradient(circle at 86% 88%, var(--brass-400) 4px, transparent 4px),
        radial-gradient(circle at 52% 38%, var(--fleck-50) 4px, transparent 4px),
        radial-gradient(circle at 24% 94%, var(--brass-400) 3px, transparent 3px);
      background-size: 190px 190px;
    }
    .swatch-light {
      background-color: var(--stone-100);
      background-image:
        radial-gradient(circle at 12% 18%, var(--basalt-900) 4px, transparent 4px),
        radial-gradient(circle at 46% 8%, var(--brass-500) 6px, transparent 6px),
        radial-gradient(circle at 78% 22%, var(--verde-600) 4px, transparent 4px),
        radial-gradient(circle at 92% 58%, var(--basalt-900) 3px, transparent 3px),
        radial-gradient(circle at 30% 52%, var(--brass-500) 3.5px, transparent 3.5px),
        radial-gradient(circle at 62% 68%, var(--basalt-900) 5px, transparent 5px),
        radial-gradient(circle at 8% 78%, var(--verde-600) 5px, transparent 5px),
        radial-gradient(circle at 86% 88%, var(--brass-500) 4px, transparent 4px),
        radial-gradient(circle at 52% 38%, var(--basalt-900) 4px, transparent 4px),
        radial-gradient(circle at 24% 94%, var(--brass-500) 3px, transparent 3px);
      background-size: 170px 170px;
    }
    .swatch-divider {
      height: 10px;
      width: 100%;
    }

    .specimen-tag {
      display: inline-flex;
      align-items: baseline;
      gap: 0.5em;
      font-family: var(--sans);
      font-weight: 700;
      font-size: 0.68rem;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--fleck-50);
      background: var(--basalt-900);
      padding: 0.4em 0.7em;
      border-radius: var(--radius);
      font-variant-numeric: tabular-nums;
    }
    .specimen-tag i {
      color: var(--brass-400);
      font-size: 0.9em;
    }

    /* ============================================================
       HEADER
       ============================================================ */
    header {
      position: sticky;
      top: 0;
      z-index: 200;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1.1rem 2.5rem;
      background: rgba(241, 236, 226, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--line);
    }
    .logo {
      font-family: var(--serif);
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: 0.02em;
      color: var(--ink-800);
    }
    .logo span {
      color: var(--brass-500);
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 2.2rem;
    }
    .nav-links a {
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--ink-600);
      position: relative;
      padding-bottom: 4px;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 0;
      height: 1px;
      background: var(--brass-500);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-links a:hover {
      color: var(--ink-800);
    }
    .header-actions {
      display: flex;
      gap: 0.8rem;
    }
    .action-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.5em;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      padding: 0.65em 1.1em;
      border-radius: var(--radius);
      border: 1px solid var(--ink-800);
      color: var(--ink-800);
      transition: all 0.2s ease;
      white-space: nowrap;
    }
    .action-btn:hover {
      background: var(--ink-800);
      color: var(--stone-50);
    }
    .zalo-btn {
      background: var(--brass-500);
      border-color: var(--brass-500);
      color: var(--fleck-50);
    }
    .zalo-btn:hover {
      background: var(--brass-400);
      border-color: var(--brass-400);
      color: var(--basalt-900);
    }
    .mobile-only {
      display: none;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--ink-800);
      transition: 0.25s;
    }

    /* ============================================================
       HERO
       ============================================================ */
    .hero {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      align-items: center;
      gap: 3rem;
      padding: 4.5rem 2.5rem 5rem;
      max-width: 1400px;
      margin: 0 auto;
    }
    .hero-content h1 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: clamp(2.2rem, 3.6vw, 3.4rem);
      line-height: 1.12;
      color: var(--ink-800);
      margin: 1.1rem 0 1.3rem;
      letter-spacing: -0.01em;
    }
    .hero-content h1 em {
      font-style: italic;
      color: var(--brass-500);
      font-weight: 500;
    }
    .hero-content>p.lede {
      font-size: 1.05rem;
      color: var(--ink-600);
      max-width: 36em;
      margin-bottom: 1.8rem;
    }
    .hero-features {
      display: flex;
      flex-wrap: wrap;
      gap: 1.4rem;
      margin-bottom: 2.2rem;
    }
    .hero-features span {
      display: flex;
      align-items: center;
      gap: 0.5em;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--ink-800);
    }
    .hero-features i {
      color: var(--verde-600);
    }
    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 1.8rem;
    }
    .btn-primary {
      background: var(--basalt-900);
      color: var(--fleck-50);
      padding: 1em 1.9em;
      font-weight: 700;
      font-size: 0.82rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      border-radius: var(--radius);
      transition: transform 0.2s ease, background 0.2s ease;
    }
    .btn-primary:hover {
      background: var(--brass-500);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid var(--ink-800);
      color: var(--ink-800);
      padding: 1em 1.9em;
      font-weight: 700;
      font-size: 0.82rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      border-radius: var(--radius);
      transition: all 0.2s ease;
    }
    .btn-outline:hover {
      background: var(--ink-800);
      color: var(--stone-50);
    }
    .hero-trust {
      font-size: 0.78rem;
      color: var(--ink-400);
      letter-spacing: 0.04em;
      border-top: 1px solid var(--line);
      padding-top: 1.1rem;
    }

    /* hero visual — the specimen swatch, standing in for photography we don't have yet */
    .hero-visual {
      position: relative;
    }
    .swatch-card {
      aspect-ratio: 1/1.05;
      border-radius: var(--radius);
      position: relative;
      overflow: hidden;
      box-shadow: 0 30px 60px -20px rgba(22, 23, 26, 0.35);
    }
    .swatch-card .swatch-dark {
      position: absolute;
      inset: 0;
    }
    .swatch-card::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(160deg, rgba(22, 23, 26, 0.05), rgba(22, 23, 26, 0.55) 90%);
    }
    .swatch-card-label {
      position: absolute;
      left: 1.6rem;
      bottom: 1.6rem;
      z-index: 2;
      color: var(--fleck-50);
    }
    .swatch-card-label .specimen-tag {
      margin-bottom: 0.7rem;
      background: rgba(22, 23, 26, 0.55);
      backdrop-filter: blur(4px);
    }
    .swatch-card-label h3 {
      font-family: var(--serif);
      font-style: italic;
      font-weight: 500;
      font-size: 1.4rem;
    }

    /* ============================================================
       DECISION STRIP
       ============================================================ */
    .decision-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1rem;
      padding: 3rem 2.5rem;
      max-width: 1400px;
      margin: 0 auto;
      background: var(--fleck-50);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .decision-item {
      text-align: center;
    }
    .decision-item i {
      font-size: 2rem;
      color: var(--brass-500);
      margin-bottom: 0.5rem;
      display: block;
    }
    .decision-item h4 {
      font-family: var(--sans);
      font-weight: 700;
      font-size: 0.9rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--ink-800);
      margin-bottom: 0.2rem;
    }
    .decision-item p {
      font-size: 0.85rem;
      color: var(--ink-400);
    }

    /* ============================================================
       UNIQUE SECTION
       ============================================================ */
    .unique-section {
      padding: 5rem 2.5rem;
      max-width: 1400px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .unique-section .section-header {
      text-align: left;
      max-width: 100%;
      margin: 0;
    }
    .unique-section .section-header .eyebrow {
      justify-content: flex-start;
    }
    .unique-section .section-header .eyebrow::after {
      content: '';
      width: 22px;
      height: 1px;
      background: var(--brass-500);
    }
    .unique-section .section-header h2 {
      font-size: clamp(1.7rem, 2.6vw, 2.4rem);
      margin-bottom: 0.7rem;
    }
    .unique-section .section-header p {
      color: var(--ink-400);
      font-size: 0.98rem;
      max-width: 36em;
    }
    .unique-visual {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.5rem;
    }
    .unique-visual img {
      width: 100%;
      aspect-ratio: 1/1;
      object-fit: cover;
      border-radius: var(--radius);
      filter: grayscale(20%);
      transition: filter 0.3s ease;
    }
    .unique-visual img:hover {
      filter: grayscale(0%);
    }
    .unique-visual img:first-child {
      grid-column: 1 / 3;
      aspect-ratio: 2/1;
    }

    /* ============================================================
       SECTION SHELL
       ============================================================ */
    .section {
      padding: 1.5rem 1.5rem;
      max-width: 1400px;
      margin: 0 auto;
    }
    .section-header {
      text-align: center;
      max-width: 640px;
      margin: 0 auto 3.2rem;
    }
    .section-header .eyebrow {
      justify-content: center;
      margin-bottom: 0.9rem;
    }
    .section-header .eyebrow::after {
      content: '';
      width: 22px;
      height: 1px;
      background: var(--brass-500);
    }
    .section-header h2 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: clamp(1.7rem, 2.6vw, 2.4rem);
      color: var(--ink-800);
      margin-bottom: 0.7rem;
    }
    .section-header p {
      color: var(--ink-400);
      font-size: 0.98rem;
    }
    .dark-section {
      background:#e5e5e5;
      color: var(--fleck-50);
    }
    .dark-section .section-header p {
      color: rgb(0 0 0 / 99%);
    }

    /* ============================================================
       PROJECTS
       ============================================================ */
    .projects-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.6rem;
    }
    .project-card {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius);
      border: 1px solid var(--line-dark);
    }
    .project-card img {
      width: 100%;
      aspect-ratio: 4/3;
      object-fit: cover;
      filter: grayscale(30%) contrast(1.05);
      transition: filter 0.4s ease, transform 0.5s ease;
    }
    .project-card:hover img {
      filter: grayscale(0%);
      transform: scale(1.04);
    }
    .project-info {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      padding: 1.2rem 1.3rem;
      background: linear-gradient(0deg, rgba(22, 23, 26, 0.92), transparent);
    }
    .project-info h4 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--fleck-50);
    }
    .project-info p {
      font-size: 0.8rem;
      color: var(--brass-400);
      margin-top: 0.2rem;
    }

    /* ============================================================
       COLLECTION / FILTER / PRODUCT GRID
       ============================================================ */
    .filter-bar {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 0.7rem;
      margin-bottom: 2.8rem;
    }
    .filter-btn {
      padding: 0.6em 1.3em;
      border: 1px solid var(--line);
      border-radius: 999px;
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      color: var(--ink-600);
      transition: all 0.2s ease;
    }
    .filter-btn:hover {
      border-color: var(--brass-500);
      color: var(--ink-800);
    }
    .filter-btn.active {
      background: var(--basalt-900);
      border-color: var(--basalt-900);
      color: var(--fleck-50);
    }

    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
    }
    .product-card {
      background: var(--fleck-50);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 40px -20px rgba(22, 23, 26, 0.25);
    }
    .card-media {
      aspect-ratio: 1/1;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1.6rem;
    }
    .card-media .specimen-tag {
      position: absolute;
      top: 1rem;
      left: 1rem;
    }
    .card-media-name {
      font-family: var(--serif);
      font-style: italic;
      font-weight: 500;
      font-size: 1.15rem;
      color: var(--fleck-50);
      text-align: center;
      z-index: 1;
    }
    .card-info {
      padding: 1.3rem 1.4rem 1.6rem;
    }
    .card-cat {
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--brass-500);
    }
    .card-title {
      font-family: var(--serif);
      font-weight: 600;
      font-size: 1.15rem;
      margin: 0.35rem 0 0.6rem;
      color: var(--ink-800);
    }
    .card-actions {
      display: flex;
      gap: 0.6rem;
      margin-top: 1rem;
    }
    .card-actions .action-btn {
      flex: 1;
      justify-content: center;
      padding: 0.6em 0.8em;
      font-size: 0.72rem;
    }

    /* ============================================================
       CUSTOMIZER SECTION
       ============================================================ */
    .customizer-section {
      background: var(--stone-100);
      padding: 5rem 2.5rem;
      max-width: 1400px;
      margin: 0 auto;
    }
    .customizer-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      max-width: 1000px;
      margin: 0 auto;
    }
    .customizer-option {
      background: var(--fleck-50);
      padding: 2rem;
      border-radius: var(--radius);
      border: 1px solid var(--line);
    }
    .customizer-option h4 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: 1.1rem;
      margin-bottom: 1rem;
    }
    .customizer-option label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--ink-600);
      margin-bottom: 0.3rem;
    }
    .customizer-option select,
    .customizer-option input[type="text"] {
      width: 100%;
      padding: 0.8em 1em;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      font-family: var(--sans);
      font-size: 0.9rem;
      background: var(--fleck-50);
    }
    .customizer-option .radio-group {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 0.5rem;
    }
    .customizer-option .radio-group label {
      font-weight: 400;
      display: flex;
      align-items: center;
      gap: 0.3rem;
      font-size: 0.85rem;
      color: var(--ink-800);
    }
    .customizer-cta {
      text-align: center;
      margin-top: 2rem;
    }

    /* ============================================================
       TRUST STACK
       ============================================================ */
    .trust-stack {
      background: var(--fleck-50);
      padding: 4rem 2.5rem;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .trust-stack-inner {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 2rem;
    }
    .trust-stack-item {
      text-align: center;
    }
    .trust-stack-item i {
      font-size: 2rem;
      color: var(--brass-500);
      margin-bottom: 0.5rem;
    }
    .trust-stack-item h4 {
      font-family: var(--sans);
      font-weight: 700;
      font-size: 0.9rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--ink-800);
      margin-bottom: 0.2rem;
    }
    .trust-stack-item p {
      font-size: 0.85rem;
      color: var(--ink-400);
    }

    /* ============================================================
       FEATURES
       ============================================================ */
    .features {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.6rem;
      padding: 0 2.5rem 5.5rem;
      max-width: 1400px;
      margin: 0 auto;
    }
    .feature {
      text-align: center;
    }
    .feature-badge {
      width: 74px;
      height: 74px;
      border-radius: 50%;
      margin: 0 auto 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      border: 1px solid var(--line);
    }
    .feature-badge .swatch-light {
      position: absolute;
      inset: 0;
    }
    .feature-badge i {
      position: relative;
      z-index: 1;
      font-size: 1.3rem;
      color: var(--fleck-50);
      background: var(--basalt-900);
      width: 38px;
      height: 38px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .feature h4 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: 1.05rem;
      margin-bottom: 0.3rem;
    }
    .feature p {
      font-size: 0.85rem;
      color: var(--ink-400);
    }

    /* ============================================================
       PROCESS
       ============================================================ */
    .process-section {
      background: var(--stone-100);
    }
    .process-timeline {
      max-width: 820px;
      margin: 0 auto;
      position: relative;
    }
    .process-timeline::before {
      content: '';
      position: absolute;
      left: 29px;
      top: 8px;
      bottom: 8px;
      width: 1px;
      background: repeating-linear-gradient(0deg, var(--brass-500) 0 6px, transparent 6px 12px);
    }
    .process-step {
      display: flex;
      gap: 1.6rem;
      padding-bottom: 2.4rem;
      position: relative;
    }
    .process-step:last-child {
      padding-bottom: 0;
    }
    .step-num {
      flex-shrink: 0;
      width: 58px;
      height: 58px;
      border-radius: 50%;
      background: var(--basalt-900);
      color: var(--brass-400);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      font-variant-numeric: tabular-nums;
      z-index: 1;
      border: 4px solid var(--stone-100);
    }
    .step-content h4 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: 1.12rem;
      margin-bottom: 0.3rem;
      padding-top: 0.9rem;
    }
    .step-content p {
      font-size: 0.9rem;
      color: var(--ink-600);
      max-width: 34em;
    }

    /* ============================================================
       PRICE OBJECTION
       ============================================================ */
    .price-objection {
      background: var(--stone-100);
      padding: 4rem 2.5rem;
      text-align: center;
    }
    .price-objection-inner {
      max-width: 800px;
      margin: 0 auto;
    }
    .price-objection h3 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: clamp(1.5rem, 2.2vw, 2rem);
      margin-bottom: 0.7rem;
    }
    .price-objection p {
      color: var(--ink-600);
      font-size: 0.95rem;
      line-height: 1.8;
    }
    .price-objection .pill-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.8rem;
      margin: 1.5rem 0 2rem;
    }
    .price-objection .pill {
      background: var(--fleck-50);
      padding: 0.4em 1.2em;
      border-radius: 999px;
      border: 1px solid var(--line);
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--ink-600);
    }

    /* ============================================================
       TESTIMONIALS
       ============================================================ */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
    }
    .testi-card {
      background: var(--basalt-800);
      border: 1px solid var(--line-dark);
      border-radius: var(--radius);
      padding: 2rem 1.8rem;
    }
    .testi-card i.fa-quote-left {
      color: var(--brass-500);
      font-size: 1.3rem;
      margin-bottom: 0.9rem;
      display: block;
    }
    .testi-card p {
      font-family: var(--serif);
      font-style: italic;
      font-size: 1.08rem;
      line-height: 1.55;
      margin-bottom: 1.4rem;
    }
    .testi-foot {
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }
    .testi-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      position: relative;
      overflow: hidden;
      flex-shrink: 0;
    }
    .testi-avatar .swatch-dark {
      position: absolute;
      inset: 0;
    }
    .testi-avatar span {
      position: relative;
      z-index: 1;
      width: 100%;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.85rem;
      color: var(--fleck-50);
      background: rgba(22, 23, 26, 0.45);
    }
    .testi-name {
      font-size: 0.85rem;
      font-weight: 600;
    }
    .testi-role {
      font-size: 0.75rem;
      color: rgba(250, 247, 239, 0.5);
    }

    /* ============================================================
       FINAL CTA
       ============================================================ */
    .final-cta {
      background: var(--basalt-900);
      color: var(--fleck-50);
      padding: 5rem 2.5rem;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .final-cta::before {
      content: '';
      position: absolute;
      inset: 0;
      opacity: 0.35;
    }
    .final-cta h2 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: clamp(1.7rem, 2.6vw, 2.3rem);
      position: relative;
      z-index: 1;
    }
    .final-cta>p {
      color: rgba(250, 247, 239, 0.6);
      margin: 0.7rem 0 2.4rem;
      position: relative;
      z-index: 1;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }
    .final-cta .btn-group {
      justify-content: center;
      position: relative;
      z-index: 1;
    }
    .final-cta .btn-primary {
      background: var(--brass-500);
      color: var(--basalt-900);
    }
    .final-cta .btn-primary:hover {
      background: var(--brass-400);
    }
    .final-cta .btn-outline {
      border-color: var(--fleck-50);
      color: var(--fleck-50);
    }
    .final-cta .btn-outline:hover {
      background: var(--fleck-50);
      color: var(--basalt-900);
    }

    /* ============================================================
       FAQ — native accordion, no JS required
       ============================================================ */
    .faq-list {
      max-width: 760px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--line);
    }
    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.3rem 0.2rem;
      font-family: var(--serif);
      font-weight: 600;
      font-size: 1.05rem;
      cursor: pointer;
      list-style: none;
      color: var(--ink-800);
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: '+';
      font-family: var(--sans);
      font-weight: 400;
      font-size: 1.5rem;
      color: var(--brass-500);
      transition: transform 0.25s ease;
      flex-shrink: 0;
    }
    .faq-item[open] summary::after {
      transform: rotate(45deg);
    }
    .faq-item p {
      padding: 0 0.2rem 1.4rem;
      color: var(--ink-600);
      font-size: 0.92rem;
      max-width: 44em;
    }

    /* ============================================================
       LEAD FORM
       ============================================================ */
    .lead-section {
      background: var(--basalt-900);
      color: var(--fleck-50);
      padding: 5.5rem 2.5rem;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .lead-section::before {
      content: '';
      position: absolute;
      inset: 0;
      opacity: 0.35;
    }
    .lead-section h2 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: clamp(1.7rem, 2.6vw, 2.3rem);
      position: relative;
      z-index: 1;
    }
    .lead-section>p {
      color: rgba(250, 247, 239, 0.6);
      margin: 0.7rem 0 2.4rem;
      position: relative;
      z-index: 1;
    }
    .lead-form {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.9rem;
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
    }
    .lead-form input,
    .lead-form select {
      width: 100%;
      max-width: 260px;
      padding: 0.95em 1.1em;
      border-radius: var(--radius);
      border: 1px solid rgba(250, 247, 239, 0.25);
      background: rgba(250, 247, 239, 0.06);
      color: var(--fleck-50);
      font-family: var(--sans);
      font-size: 0.9rem;
    }
    .lead-form input::placeholder {
      color: rgba(250, 247, 239, 0.45);
    }
    .lead-form select {
      color: rgba(250, 247, 239, 0.75);
    }
    .lead-form select option {
      color: var(--ink-800);
    }
    .lead-form button {
      background: var(--brass-500);
      color: var(--basalt-900);
      font-weight: 700;
      font-size: 0.82rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      padding: 0.95em 2em;
      border-radius: var(--radius);
      transition: background 0.2s ease;
    }
    .lead-form button:hover {
      background: var(--brass-400);
    }
    .error-msg {
      display: block;
      color: #D98866;
      font-size: 0.75rem;
      margin-top: 0.35rem;
      text-align: left;
    }

    /* ============================================================
       FOOTER
       ============================================================ */
    footer {
      background: var(--basalt-900);
      color: rgba(250, 247, 239, 0.7);
      padding: 4rem 2.5rem 1.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 2.5rem;
      max-width: 1400px;
      margin: 0 auto 2.5rem;
      padding-bottom: 2.5rem;
      border-bottom: 1px solid var(--line-dark);
    }
    footer h4 {
      font-family: var(--serif);
      color: var(--fleck-50);
      font-weight: 600;
      margin-bottom: 1rem;
      font-size: 1.02rem;
    }
    footer p {
      font-size: 0.85rem;
      margin-bottom: 0.5rem;
      line-height: 1.7;
    }
    .social-links {
      display: flex;
      gap: 0.8rem;
      margin-top: 1rem;
    }
    .social-links a {
      width: 34px;
      height: 34px;
      border: 1px solid var(--line-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }
    .social-links a:hover {
      background: var(--brass-500);
      border-color: var(--brass-500);
      color: var(--basalt-900);
    }
    .footer-bottom {
      text-align: center;
      font-size: 0.75rem;
      color: rgba(250, 247, 239, 0.4);
      max-width: 1400px;
      margin: 0 auto;
    }

    /* ============================================================
       STICKY / FLOAT
       ============================================================ */
    .sticky-cta {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 300;
      background: var(--basalt-900);
      border-top: 1px solid var(--line-dark);
    }
    .sticky-btn {
      flex: 1;
      text-align: center;
      padding: 1em;
      font-weight: 700;
      font-size: 0.82rem;
      letter-spacing: 0.04em;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5em;
    }
    .sticky-btn.call {
      color: var(--fleck-50);
    }
    .sticky-btn.lead {
      background: var(--brass-500);
      color: var(--basalt-900);
    }
    .float-icons {
      position: fixed;
      right: 1.4rem;
      bottom: 5.5rem;
      z-index: 300;
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--basalt-900);
      color: var(--fleck-50);
      box-shadow: 0 10px 25px -8px rgba(22, 23, 26, 0.4);
      font-size: 1.1rem;
    }
    .float-btn.zalo {
      background: var(--brass-500);
      color: var(--basalt-900);
    }

    /* ============================================================
       MODAL
       ============================================================ */
    .modal {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 400;
      background: rgba(22, 23, 26, 0.6);
      backdrop-filter: blur(3px);
      align-items: center;
      justify-content: center;
      padding: 1.5rem;
    }
    .modal-content {
      background: var(--fleck-50);
      max-width: 420px;
      width: 100%;
      padding: 2.2rem;
      border-radius: var(--radius);
      position: relative;
    }
    .modal-content h3 {
      font-family: var(--serif);
      font-weight: 600;
      font-size: 1.3rem;
      margin-bottom: 0.6rem;
    }
    .modal-content p {
      font-size: 0.9rem;
      color: var(--ink-600);
      margin-bottom: 1.2rem;
    }
    .modal-content input {
      width: 100%;
      padding: 0.9em 1em;
      margin-bottom: 0.9rem;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      font-family: var(--sans);
    }
    .modal-content button {
      width: 100%;
      background: var(--basalt-900);
      color: var(--fleck-50);
      font-weight: 700;
      padding: 0.9em;
      border-radius: var(--radius);
      letter-spacing: 0.06em;
      font-size: 0.82rem;
      text-transform: uppercase;
      transition: background 0.2s ease;
    }
    .modal-content button:hover {
      background: var(--brass-500);
    }
    .modal-close {
      position: absolute;
      top: 1.2rem;
      right: 1.4rem;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--ink-400);
      line-height: 1;
    }

    /* ============================================================
       RESPONSIVE
       ============================================================ */
    @media (max-width: 980px) {
      .hero {
        grid-template-columns: 1fr;
        padding-top: 2.5rem;
      }
      .hero-visual {
        order: -1;
        max-width: 360px;
        margin: 0 auto;
      }
      .decision-strip {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
      }
      .unique-section {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .unique-section .section-header {
        text-align: center;
      }
      .unique-section .section-header .eyebrow {
        justify-content: center;
      }
      .customizer-grid {
        grid-template-columns: 1fr;
      }
      .trust-stack-inner {
        grid-template-columns: 1fr 1fr;
      }
      .projects-grid,
      .product-grid,
      .testi-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .features {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 2.2rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 680px) {
      header {
        padding: 1rem 1.3rem;
      }
      .header-actions {
        display: none;
      }
      .mobile-only {
        display: block;
      }
      .hamburger {
        display: flex;
      }
      .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--stone-50);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.1rem;
        border-bottom: 1px solid var(--line);
        transform: translateY(-120%);
        transition: transform 0.3s ease;
        opacity: 0;
      }
      .nav-links.active {
        transform: translateY(0);
        opacity: 1;
      }
      .section {
        padding: 3.5rem 1.3rem;
      }
      .hero {
        padding: 2rem 1.3rem 3rem;
      }
      .decision-strip {
        padding: 2rem 1.3rem;
        grid-template-columns: 1fr 1fr;
      }
      .unique-section {
        padding: 3rem 1.3rem;
      }
      .unique-visual {
        grid-template-columns: 1fr;
      }
      .unique-visual img:first-child {
        grid-column: 1;
        aspect-ratio: 1/1;
      }
      .customizer-section {
        padding: 3rem 1.3rem;
      }
      .trust-stack {
        padding: 2.5rem 1.3rem;
      }
      .trust-stack-inner {
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }
      .projects-grid,
      .product-grid,
      .testi-grid,
      .features {
        grid-template-columns: 1fr;
      }
      .lead-section {
        padding: 3.5rem 1.3rem;
      }
      .sticky-cta {
        display: flex;
      }
      .float-icons {
        bottom: 5.2rem;
        right: 1rem;
      }
    }


        /* ============================================================
           TOKENS — quarry palette
           ============================================================ */
        :root {
            --stone-50: #F1ECE2;
            --stone-100: #E7DECC;
            --stone-200: #D9CBAD;
            --basalt-900: #16171A;
            --basalt-800: #212226;
            --basalt-700: #2C2D32;
            --brass-500: #AD8348;
            --brass-400: #C9A469;
            --verde-600: #54614C;
            --verde-500: #6C7A62;
            --fleck-50: #FAF7EF;
            --ink-800: #2A271F;
            --ink-600: #524C3F;
            --ink-400: #8A8371;
            --line: rgba(42, 39, 31, 0.14);
            --line-dark: rgba(250, 247, 239, 0.14);
            --radius: 2px;
            --serif: 'Playfair Display', 'Times New Roman', serif;
            --sans: 'Be Vietnam Pro', -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--sans);
            background: var(--stone-50);
            color: var(--ink-800);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        :focus-visible {
            outline: 2px solid var(--brass-500);
            outline-offset: 3px;
        }
        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
        }

        .eyebrow {
            font-family: var(--sans);
            font-weight: 700;
            font-size: 0.72rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--brass-500);
            display: flex;
            align-items: center;
            gap: 0.6em;
        }
        .eyebrow::before {
            content: '';
            width: 22px;
            height: 1px;
            background: var(--brass-500);
        }

        /* ============================================================
           TERRAZZO SWATCH — signature texture
           ============================================================ */
        .swatch-dark,
        .swatch-light {
            background-repeat: repeat;
        }
        .swatch-dark {
            background-color: var(--basalt-900);
            background-image:
                radial-gradient(circle at 12% 18%, var(--fleck-50) 5px, transparent 5px),
                radial-gradient(circle at 46% 8%, var(--brass-400) 6px, transparent 6px),
                radial-gradient(circle at 78% 22%, var(--verde-500) 4px, transparent 4px),
                radial-gradient(circle at 92% 58%, var(--fleck-50) 3px, transparent 3px),
                radial-gradient(circle at 30% 52%, var(--brass-400) 3.5px, transparent 3.5px),
                radial-gradient(circle at 62% 68%, var(--fleck-50) 6px, transparent 6px),
                radial-gradient(circle at 8% 78%, var(--verde-500) 5px, transparent 5px),
                radial-gradient(circle at 86% 88%, var(--brass-400) 4px, transparent 4px),
                radial-gradient(circle at 52% 38%, var(--fleck-50) 4px, transparent 4px),
                radial-gradient(circle at 24% 94%, var(--brass-400) 3px, transparent 3px);
            background-size: 190px 190px;
        }
        .swatch-light {
            background-color: var(--stone-100);
            background-image:
                radial-gradient(circle at 12% 18%, var(--basalt-900) 4px, transparent 4px),
                radial-gradient(circle at 46% 8%, var(--brass-500) 6px, transparent 6px),
                radial-gradient(circle at 78% 22%, var(--verde-600) 4px, transparent 4px),
                radial-gradient(circle at 92% 58%, var(--basalt-900) 3px, transparent 3px),
                radial-gradient(circle at 30% 52%, var(--brass-500) 3.5px, transparent 3.5px),
                radial-gradient(circle at 62% 68%, var(--basalt-900) 5px, transparent 5px),
                radial-gradient(circle at 8% 78%, var(--verde-600) 5px, transparent 5px),
                radial-gradient(circle at 86% 88%, var(--brass-500) 4px, transparent 4px),
                radial-gradient(circle at 52% 38%, var(--basalt-900) 4px, transparent 4px),
                radial-gradient(circle at 24% 94%, var(--brass-500) 3px, transparent 3px);
            background-size: 170px 170px;
        }

        /* ============================================================
           HEADER
           ============================================================ */
        header {
            position: sticky;
            top: 0;
            z-index: 200;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 2.5rem;
            background: rgba(241, 236, 226, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--line);
        }
        .logo {
            font-family: var(--serif);
            font-weight: 700;
            font-size: 1.5rem;
            letter-spacing: 0.02em;
            color: var(--ink-800);
        }
        .logo span {
            color: var(--brass-500);
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2.2rem;
        }
        .nav-links a {
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--ink-600);
            position: relative;
            padding-bottom: 4px;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 1px;
            background: var(--brass-500);
            transition: width 0.25s ease;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--ink-800);
        }
        .header-actions {
            display: flex;
            gap: 0.8rem;
        }
        .action-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5em;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            padding: 0.65em 1.1em;
            border-radius: var(--radius);
            border: 1px solid var(--ink-800);
            color: var(--ink-800);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .action-btn:hover {
            background: var(--ink-800);
            color: var(--stone-50);
        }
        .zalo-btn {
            background: var(--brass-500);
            border-color: var(--brass-500);
            color: var(--fleck-50);
        }
        .zalo-btn:hover {
            background: var(--brass-400);
            border-color: var(--brass-400);
            color: var(--basalt-900);
        }
        .mobile-only {
            display: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--ink-800);
            transition: 0.25s;
        }

        /* ============================================================
           PAGE HERO
           ============================================================ */
        .page-hero {
            background: var(--basalt-900);
            color: var(--fleck-50);
            padding: 5rem 2.5rem 4rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            opacity: 0.2;
            background-image:
                radial-gradient(circle at 20% 30%, var(--brass-400) 4px, transparent 4px),
                radial-gradient(circle at 70% 60%, var(--fleck-50) 6px, transparent 6px),
                radial-gradient(circle at 40% 80%, var(--verde-500) 3px, transparent 3px);
            background-size: 120px 120px;
        }
        .page-hero .specimen-tag {
            display: inline-block;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
            background: rgba(22, 23, 26, 0.7);
            backdrop-filter: blur(4px);
            padding: 0.6rem 1.2rem;
            font-size: 0.7rem;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: var(--brass-400);
            border: 1px solid rgba(250, 247, 239, 0.1);
            border-radius: var(--radius);
        }
        .page-hero h1 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(2.5rem, 5vw, 4.2rem);
            letter-spacing: -0.02em;
            position: relative;
            z-index: 1;
            line-height: 1.1;
        }
        .page-hero h1 span {
            color: var(--brass-400);
            font-style: italic;
        }
        .page-hero p {
            color: rgba(250, 247, 239, 0.6);
            font-size: 1.1rem;
            margin-top: 0.8rem;
            position: relative;
            z-index: 1;
            letter-spacing: 0.06em;
            font-weight: 300;
        }

        /* ============================================================
           ABOUT SECTION
           ============================================================ */
        .about-section {
            padding: 5rem 2.5rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
            margin-bottom: 4rem;
        }
        .about-text .eyebrow {
            margin-bottom: 1rem;
        }
        .about-text h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(1.8rem, 3vw, 2.6rem);
            color: var(--ink-800);
            line-height: 1.15;
            margin-bottom: 1.2rem;
        }
        .about-text p {
            color: var(--ink-600);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 1rem;
        }
        .about-text .signature {
            font-family: var(--serif);
            font-style: italic;
            color: var(--brass-500);
            font-size: 1.1rem;
            margin-top: 1.2rem;
            letter-spacing: 0.04em;
        }
        .about-img {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 30px 60px -20px rgba(22, 23, 26, 0.3);
        }
        .about-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
            transition: transform 0.6s ease;
        }
        .about-img:hover img {
            transform: scale(1.03);
        }
        .about-img .swatch-dark {
            position: absolute;
            inset: 0;
        }

        /* ============================================================
           VALUES
           ============================================================ */
        .values {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
            margin: 0 0 4rem;
        }
        .value-card {
            background: var(--fleck-50);
            padding: 2.2rem 1.8rem;
            border-radius: var(--radius);
            border: 1px solid var(--line);
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .value-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px -20px rgba(22, 23, 26, 0.15);
        }
        .value-card i {
            font-size: 2.2rem;
            color: var(--brass-500);
            margin-bottom: 0.8rem;
            display: block;
        }
        .value-card h3 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
        }
        .value-card p {
            font-size: 0.88rem;
            color: var(--ink-400);
            line-height: 1.6;
        }

        /* ============================================================
           WORKSHOP
           ============================================================ */
        .workshop-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .workshop-title .eyebrow {
            justify-content: center;
            margin-bottom: 0.5rem;
        }
        .workshop-title .eyebrow::after {
            content: '';
            width: 22px;
            height: 1px;
            background: var(--brass-500);
        }
        .workshop-title h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(1.8rem, 2.8vw, 2.4rem);
            color: var(--ink-800);
        }
        .workshop-title h2 span {
            color: var(--brass-500);
        }
        .workshop-title p {
            color: var(--ink-400);
            font-size: 0.98rem;
            margin-top: 0.5rem;
        }

        .workshop-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .workshop-card {
            background: var(--fleck-50);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--line);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .workshop-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px -20px rgba(22, 23, 26, 0.15);
        }
        .workshop-card img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .workshop-card:hover img {
            transform: scale(1.04);
        }
        .workshop-card .info {
            padding: 1.5rem 1.6rem 1.8rem;
        }
        .workshop-card .info h3 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: 1.05rem;
            margin-bottom: 0.4rem;
        }
        .workshop-card .info p {
            font-size: 0.88rem;
            color: var(--ink-400);
            line-height: 1.6;
        }

        /* ============================================================
           STUDIO QUOTE
           ============================================================ */
        .studio-quote {
            background: var(--stone-100);
            padding: 4rem 2.5rem;
            margin-top: 4rem;
            border-radius: var(--radius);
            text-align: center;
            position: relative;
        }
        .studio-quote i {
            font-size: 2.5rem;
            color: var(--brass-500);
            opacity: 0.3;
            margin-bottom: 0.8rem;
            display: block;
        }
        .studio-quote blockquote {
            font-family: var(--serif);
            font-style: italic;
            font-size: clamp(1.2rem, 2vw, 1.6rem);
            color: var(--ink-800);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .studio-quote .attribution {
            margin-top: 1.2rem;
            font-size: 0.9rem;
            color: var(--ink-400);
            letter-spacing: 0.04em;
        }
        .studio-quote .attribution strong {
            color: var(--ink-800);
            font-weight: 600;
        }

        /* ============================================================
           CTA SECTION
           ============================================================ */
        .about-cta {
            background: var(--basalt-900);
            color: var(--fleck-50);
            padding: 4rem 2.5rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin-top: 0;
        }
        .about-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            opacity: 0.15;
            background-image:
                radial-gradient(circle at 30% 40%, var(--brass-400) 3px, transparent 3px),
                radial-gradient(circle at 70% 60%, var(--fleck-50) 5px, transparent 5px);
            background-size: 100px 100px;
        }
        .about-cta h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(1.6rem, 2.6vw, 2.2rem);
            position: relative;
            z-index: 1;
        }
        .about-cta p {
            color: rgba(250, 247, 239, 0.6);
            margin: 0.8rem 0 2rem;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .about-cta .btn-group {
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .about-cta .btn-primary {
            background: var(--brass-500);
            color: var(--basalt-900);
            padding: 1em 2.2em;
            font-weight: 700;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            border-radius: var(--radius);
            transition: transform 0.2s ease, background 0.2s ease;
        }
        .about-cta .btn-primary:hover {
            background: var(--brass-400);
            transform: translateY(-2px);
        }
        .about-cta .btn-outline {
            border: 1px solid var(--fleck-50);
            color: var(--fleck-50);
            padding: 1em 2.2em;
            font-weight: 700;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            border-radius: var(--radius);
            transition: all 0.2s ease;
        }
        .about-cta .btn-outline:hover {
            background: var(--fleck-50);
            color: var(--basalt-900);
        }

        /* ============================================================
           FOOTER
           ============================================================ */
        footer {
            background: var(--basalt-900);
            color: rgba(250, 247, 239, 0.7);
            padding: 3.5rem 2.5rem 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 2.5rem;
            max-width: 1400px;
            margin: 0 auto 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--line-dark);
        }
        footer h4 {
            font-family: var(--serif);
            color: var(--fleck-50);
            font-weight: 600;
            margin-bottom: 1rem;
            font-size: 1.02rem;
        }
        footer p {
            font-size: 0.85rem;
            margin-bottom: 0.5rem;
            line-height: 1.7;
        }
        .footer-bottom {
            text-align: center;
            font-size: 0.75rem;
            color: rgba(250, 247, 239, 0.4);
            max-width: 1400px;
            margin: 0 auto;
        }

        /* ============================================================
           FLOAT ICONS
           ============================================================ */
        .float-icons {
            position: fixed;
            right: 1.4rem;
            bottom: 2rem;
            z-index: 300;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--basalt-900);
            color: var(--fleck-50);
            box-shadow: 0 10px 25px -8px rgba(22, 23, 26, 0.4);
            font-size: 1.1rem;
            transition: transform 0.2s ease;
        }
        .float-btn:hover {
            transform: scale(1.08);
        }
        .float-btn.zalo {
            background: var(--brass-500);
            color: var(--basalt-900);
        }

        /* ============================================================
           RESPONSIVE
           ============================================================ */
        @media (max-width: 980px) {
            .about-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .about-img {
                order: -1;
            }
            .values {
                grid-template-columns: repeat(3, 1fr);
            }
            .workshop-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 680px) {
            header {
                padding: 1rem 1.3rem;
            }
            .header-actions {
                display: none;
            }
            .mobile-only {
                display: block;
            }
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--stone-50);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1.1rem;
                border-bottom: 1px solid var(--line);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                opacity: 0;
            }
            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
            }
            .page-hero {
                padding: 3rem 1.3rem 2.5rem;
            }
            .about-section {
                padding: 3rem 1.3rem;
            }
            .values {
                grid-template-columns: 1fr;
            }
            .workshop-grid {
                grid-template-columns: 1fr;
            }
            .studio-quote {
                padding: 2.5rem 1.3rem;
                margin-top: 2.5rem;
            }
            .about-cta {
                padding: 3rem 1.3rem;
            }
            footer {
                padding: 2.5rem 1.3rem 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .float-icons {
                bottom: 5.2rem;
                right: 1rem;
            }
        }


       /* ============================================================
           TOKENS — quarry palette
           ============================================================ */
        :root {
            --stone-50: #F1ECE2;
            --stone-100: #E7DECC;
            --stone-200: #D9CBAD;
            --basalt-900: #16171A;
            --basalt-800: #212226;
            --basalt-700: #2C2D32;
            --brass-500: #AD8348;
            --brass-400: #C9A469;
            --verde-600: #54614C;
            --verde-500: #6C7A62;
            --fleck-50: #FAF7EF;
            --ink-800: #2A271F;
            --ink-600: #524C3F;
            --ink-400: #8A8371;
            --line: rgba(42, 39, 31, 0.14);
            --line-dark: rgba(250, 247, 239, 0.14);
            --radius: 2px;
            --serif: 'Playfair Display', 'Times New Roman', serif;
            --sans: 'Be Vietnam Pro', -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--sans);
            background: var(--stone-50);
            color: var(--ink-800);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        :focus-visible {
            outline: 2px solid var(--brass-500);
            outline-offset: 3px;
        }
        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
        }

        .eyebrow {
            font-family: var(--sans);
            font-weight: 700;
            font-size: 0.72rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--brass-500);
            display: flex;
            align-items: center;
            gap: 0.6em;
        }
        .eyebrow::before {
            content: '';
            width: 22px;
            height: 1px;
            background: var(--brass-500);
        }

        /* ============================================================
           TERRAZZO SWATCH — signature texture
           ============================================================ */
        .swatch-dark,
        .swatch-light {
            background-repeat: repeat;
        }
        .swatch-dark {
            background-color: var(--basalt-900);
            background-image:
                radial-gradient(circle at 12% 18%, var(--fleck-50) 5px, transparent 5px),
                radial-gradient(circle at 46% 8%, var(--brass-400) 6px, transparent 6px),
                radial-gradient(circle at 78% 22%, var(--verde-500) 4px, transparent 4px),
                radial-gradient(circle at 92% 58%, var(--fleck-50) 3px, transparent 3px),
                radial-gradient(circle at 30% 52%, var(--brass-400) 3.5px, transparent 3.5px),
                radial-gradient(circle at 62% 68%, var(--fleck-50) 6px, transparent 6px),
                radial-gradient(circle at 8% 78%, var(--verde-500) 5px, transparent 5px),
                radial-gradient(circle at 86% 88%, var(--brass-400) 4px, transparent 4px),
                radial-gradient(circle at 52% 38%, var(--fleck-50) 4px, transparent 4px),
                radial-gradient(circle at 24% 94%, var(--brass-400) 3px, transparent 3px);
            background-size: 190px 190px;
        }
        .swatch-light {
            background-color: var(--stone-100);
            background-image:
                radial-gradient(circle at 12% 18%, var(--basalt-900) 4px, transparent 4px),
                radial-gradient(circle at 46% 8%, var(--brass-500) 6px, transparent 6px),
                radial-gradient(circle at 78% 22%, var(--verde-600) 4px, transparent 4px),
                radial-gradient(circle at 92% 58%, var(--basalt-900) 3px, transparent 3px),
                radial-gradient(circle at 30% 52%, var(--brass-500) 3.5px, transparent 3.5px),
                radial-gradient(circle at 62% 68%, var(--basalt-900) 5px, transparent 5px),
                radial-gradient(circle at 8% 78%, var(--verde-600) 5px, transparent 5px),
                radial-gradient(circle at 86% 88%, var(--brass-500) 4px, transparent 4px),
                radial-gradient(circle at 52% 38%, var(--basalt-900) 4px, transparent 4px),
                radial-gradient(circle at 24% 94%, var(--brass-500) 3px, transparent 3px);
            background-size: 170px 170px;
        }

        /* ============================================================
           HEADER
           ============================================================ */
        header {
            position: sticky;
            top: 0;
            z-index: 200;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 2.5rem;
            background: rgba(241, 236, 226, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--line);
        }
        .logo {
            font-family: var(--serif);
            font-weight: 700;
            font-size: 1.5rem;
            letter-spacing: 0.02em;
            color: var(--ink-800);
        }
        .logo span {
            color: var(--brass-500);
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2.2rem;
        }
        .nav-links a {
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--ink-600);
            position: relative;
            padding-bottom: 4px;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 1px;
            background: var(--brass-500);
            transition: width 0.25s ease;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--ink-800);
        }
        .header-actions {
            display: flex;
            gap: 0.8rem;
        }
        .action-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5em;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            padding: 0.65em 1.1em;
            border-radius: var(--radius);
            border: 1px solid var(--ink-800);
            color: var(--ink-800);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .action-btn:hover {
            background: var(--ink-800);
            color: var(--stone-50);
        }
        .zalo-btn {
            background: var(--brass-500);
            border-color: var(--brass-500);
            color: var(--fleck-50);
        }
        .zalo-btn:hover {
            background: var(--brass-400);
            border-color: var(--brass-400);
            color: var(--basalt-900);
        }
        .mobile-only {
            display: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--ink-800);
            transition: 0.25s;
        }

        /* ============================================================
           PAGE HERO
           ============================================================ */
        .page-hero {
            background: var(--basalt-900);
            color: var(--fleck-50);
            padding: 5rem 2.5rem 4rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            opacity: 0.2;
            background-image:
                radial-gradient(circle at 20% 30%, var(--brass-400) 4px, transparent 4px),
                radial-gradient(circle at 70% 60%, var(--fleck-50) 6px, transparent 6px),
                radial-gradient(circle at 40% 80%, var(--verde-500) 3px, transparent 3px);
            background-size: 120px 120px;
        }
        .page-hero .specimen-tag {
            display: inline-block;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
            background: rgba(22, 23, 26, 0.7);
            backdrop-filter: blur(4px);
            padding: 0.6rem 1.2rem;
            font-size: 0.7rem;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: var(--brass-400);
            border: 1px solid rgba(250, 247, 239, 0.1);
            border-radius: var(--radius);
        }
        .page-hero h1 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(2.5rem, 5vw, 4.2rem);
            letter-spacing: -0.02em;
            position: relative;
            z-index: 1;
            line-height: 1.1;
        }
        .page-hero h1 span {
            color: var(--brass-400);
            font-style: italic;
        }
        .page-hero p {
            color: rgba(250, 247, 239, 0.6);
            font-size: 1.1rem;
            margin-top: 0.8rem;
            position: relative;
            z-index: 1;
            letter-spacing: 0.06em;
            font-weight: 300;
        }

        /* ============================================================
           ABOUT SECTION
           ============================================================ */
        .about-section {
            padding: 5rem 2.5rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
            margin-bottom: 4rem;
        }
        .about-text .eyebrow {
            margin-bottom: 1rem;
        }
        .about-text h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(1.8rem, 3vw, 2.6rem);
            color: var(--ink-800);
            line-height: 1.15;
            margin-bottom: 1.2rem;
        }
        .about-text p {
            color: var(--ink-600);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 1rem;
        }
        .about-text .signature {
            font-family: var(--serif);
            font-style: italic;
            color: var(--brass-500);
            font-size: 1.1rem;
            margin-top: 1.2rem;
            letter-spacing: 0.04em;
        }
        .about-img {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 30px 60px -20px rgba(22, 23, 26, 0.3);
        }
        .about-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
            transition: transform 0.6s ease;
        }
        .about-img:hover img {
            transform: scale(1.03);
        }
        .about-img .swatch-dark {
            position: absolute;
            inset: 0;
        }

        /* ============================================================
           VALUES
           ============================================================ */
        .values {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
            margin: 0 0 4rem;
        }
        .value-card {
            background: var(--fleck-50);
            padding: 2.2rem 1.8rem;
            border-radius: var(--radius);
            border: 1px solid var(--line);
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .value-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px -20px rgba(22, 23, 26, 0.15);
        }
        .value-card i {
            font-size: 2.2rem;
            color: var(--brass-500);
            margin-bottom: 0.8rem;
            display: block;
        }
        .value-card h3 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
        }
        .value-card p {
            font-size: 0.88rem;
            color: var(--ink-400);
            line-height: 1.6;
        }

        /* ============================================================
           WORKSHOP
           ============================================================ */
        .workshop-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .workshop-title .eyebrow {
            justify-content: center;
            margin-bottom: 0.5rem;
        }
        .workshop-title .eyebrow::after {
            content: '';
            width: 22px;
            height: 1px;
            background: var(--brass-500);
        }
        .workshop-title h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(1.8rem, 2.8vw, 2.4rem);
            color: var(--ink-800);
        }
        .workshop-title h2 span {
            color: var(--brass-500);
        }
        .workshop-title p {
            color: var(--ink-400);
            font-size: 0.98rem;
            margin-top: 0.5rem;
        }

        .workshop-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .workshop-card {
            background: var(--fleck-50);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--line);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .workshop-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px -20px rgba(22, 23, 26, 0.15);
        }
        .workshop-card img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .workshop-card:hover img {
            transform: scale(1.04);
        }
        .workshop-card .info {
            padding: 1.5rem 1.6rem 1.8rem;
        }
        .workshop-card .info h3 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: 1.05rem;
            margin-bottom: 0.4rem;
        }
        .workshop-card .info p {
            font-size: 0.88rem;
            color: var(--ink-400);
            line-height: 1.6;
        }

        /* ============================================================
           STUDIO QUOTE
           ============================================================ */
        .studio-quote {
            background: var(--stone-100);
            padding: 4rem 2.5rem;
            margin-top: 4rem;
            border-radius: var(--radius);
            text-align: center;
            position: relative;
        }
        .studio-quote i {
            font-size: 2.5rem;
            color: var(--brass-500);
            opacity: 0.3;
            margin-bottom: 0.8rem;
            display: block;
        }
        .studio-quote blockquote {
            font-family: var(--serif);
            font-style: italic;
            font-size: clamp(1.2rem, 2vw, 1.6rem);
            color: var(--ink-800);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .studio-quote .attribution {
            margin-top: 1.2rem;
            font-size: 0.9rem;
            color: var(--ink-400);
            letter-spacing: 0.04em;
        }
        .studio-quote .attribution strong {
            color: var(--ink-800);
            font-weight: 600;
        }

        /* ============================================================
           CTA SECTION
           ============================================================ */
        .about-cta {
            background: var(--basalt-900);
            color: var(--fleck-50);
            padding: 4rem 2.5rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin-top: 0;
        }
        .about-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            opacity: 0.15;
            background-image:
                radial-gradient(circle at 30% 40%, var(--brass-400) 3px, transparent 3px),
                radial-gradient(circle at 70% 60%, var(--fleck-50) 5px, transparent 5px);
            background-size: 100px 100px;
        }
        .about-cta h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: clamp(1.6rem, 2.6vw, 2.2rem);
            position: relative;
            z-index: 1;
        }
        .about-cta p {
            color: rgba(250, 247, 239, 0.6);
            margin: 0.8rem 0 2rem;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .about-cta .btn-group {
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .about-cta .btn-primary {
            background: var(--brass-500);
            color: var(--basalt-900);
            padding: 1em 2.2em;
            font-weight: 700;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            border-radius: var(--radius);
            transition: transform 0.2s ease, background 0.2s ease;
        }
        .about-cta .btn-primary:hover {
            background: var(--brass-400);
            transform: translateY(-2px);
        }
        .about-cta .btn-outline {
            border: 1px solid var(--fleck-50);
            color: var(--fleck-50);
            padding: 1em 2.2em;
            font-weight: 700;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            border-radius: var(--radius);
            transition: all 0.2s ease;
        }
        .about-cta .btn-outline:hover {
            background: var(--fleck-50);
            color: var(--basalt-900);
        }

        /* ============================================================
           FOOTER
           ============================================================ */
        footer {
            background: var(--basalt-900);
            color: rgba(250, 247, 239, 0.7);
            padding: 3.5rem 2.5rem 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 2.5rem;
            max-width: 1400px;
            margin: 0 auto 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--line-dark);
        }
        footer h4 {
            font-family: var(--serif);
            color: var(--fleck-50);
            font-weight: 600;
            margin-bottom: 1rem;
            font-size: 1.02rem;
        }
        footer p {
            font-size: 0.85rem;
            margin-bottom: 0.5rem;
            line-height: 1.7;
        }
        .footer-bottom {
            text-align: center;
            font-size: 0.75rem;
            color: rgba(250, 247, 239, 0.4);
            max-width: 1400px;
            margin: 0 auto;
        }

        /* ============================================================
           FLOAT ICONS
           ============================================================ */
        .float-icons {
            position: fixed;
            right: 1.4rem;
            bottom: 2rem;
            z-index: 300;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--basalt-900);
            color: var(--fleck-50);
            box-shadow: 0 10px 25px -8px rgba(22, 23, 26, 0.4);
            font-size: 1.1rem;
            transition: transform 0.2s ease;
        }
        .float-btn:hover {
            transform: scale(1.08);
        }
        .float-btn.zalo {
            background: var(--brass-500);
            color: var(--basalt-900);
        }

        /* ============================================================
           RESPONSIVE
           ============================================================ */
        @media (max-width: 980px) {
            .about-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .about-img {
                order: -1;
            }
            .values {
                grid-template-columns: repeat(3, 1fr);
            }
            .workshop-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 680px) {
            header {
                padding: 1rem 1.3rem;
            }
            .header-actions {
                display: none;
            }
            .mobile-only {
                display: block;
            }
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--stone-50);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1.1rem;
                border-bottom: 1px solid var(--line);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                opacity: 0;
            }
            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
            }
            .page-hero {
                padding: 3rem 1.3rem 2.5rem;
            }
            .about-section {
                padding: 3rem 1.3rem;
            }
            .values {
                grid-template-columns: 1fr;
            }
            .workshop-grid {
                grid-template-columns: 1fr;
            }
            .studio-quote {
                padding: 2.5rem 1.3rem;
                margin-top: 2.5rem;
            }
            .about-cta {
                padding: 3rem 1.3rem;
            }
            footer {
                padding: 2.5rem 1.3rem 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .float-icons {
                bottom: 5.2rem;
                right: 1rem;
            }
        }

/* ============================================================
   COLLECTION — PAGINATION PURE CSS
   ============================================================ */

/* Ẩn radio để dùng label thay thế */
.page-radio {
    display: none;
}

/* Mặc định ẩn tất cả các trang */
.product-grid {
    display: none;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.8rem;
}

/* Hiển thị trang được chọn */
#page1:checked ~ .product-grid.page-1,
#page2:checked ~ .product-grid.page-2,
#page3:checked ~ .product-grid.page-3 {
    display: grid;
}

/* ============================================================
   FILTER — Lọc bằng CSS
   ============================================================ */
.filter-btn input[type="radio"] {
    display: none;
}

/* Mặc định hiển thị tất cả sản phẩm */
.filter-btn {
    cursor: pointer;
}

/* Lọc theo danh mục */
#filter-all:checked ~ .product-grid .product-card {
    display: block;
}
#filter-tub:checked ~ .product-grid .product-card[data-cat="tub"],
#filter-kitchen:checked ~ .product-grid .product-card[data-cat="kitchen"],
#filter-sink:checked ~ .product-grid .product-card[data-cat="sink"],
#filter-accessory:checked ~ .product-grid .product-card[data-cat="accessory"] {
    display: block;
}
#filter-tub:checked ~ .product-grid .product-card:not([data-cat="tub"]),
#filter-kitchen:checked ~ .product-grid .product-card:not([data-cat="kitchen"]),
#filter-sink:checked ~ .product-grid .product-card:not([data-cat="sink"]),
#filter-accessory:checked ~ .product-grid .product-card:not([data-cat="accessory"]) {
    display: none;
}

/* ============================================================
   PAGINATION LABELS
   ============================================================ */
.pagination-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
}

.pagination {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.pagination-label {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.8rem;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink-600);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
}

.pagination-label:hover:not(.active) {
    border-color: var(--brass-500);
    color: var(--ink-800);
    background: var(--fleck-50);
}

.pagination-label.active {
    background: var(--basalt-900);
    border-color: var(--basalt-900);
    color: var(--fleck-50);
}

/* Cập nhật trạng thái active của dot */
#page1:checked ~ .pagination-container #dot1,
#page2:checked ~ .pagination-container #dot2,
#page3:checked ~ .pagination-container #dot3 {
    background: var(--basalt-900);
    border-color: var(--basalt-900);
    color: var(--fleck-50);
}

.pagination-info {
    font-size: 0.8rem;
    color: var(--ink-400);
    letter-spacing: 0.02em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 680px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    .pagination-label {
        min-width: 36px;
        height: 36px;
        font-size: 0.75rem;
        padding: 0 0.5rem;
    }
    .pagination-info {
        font-size: 0.7rem;
    }
}