/* ============================================================
           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;
        }

        .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,
        .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 30% 40%, var(--brass-400) 4px, transparent 4px),
                radial-gradient(circle at 70% 20%, var(--fleck-50) 6px, transparent 6px),
                radial-gradient(circle at 50% 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;
        }

        /* ============================================================
           CONTACT GRID
           ============================================================ */
        .contact-section {
            padding: 4rem 2.5rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
        }

        /* ============================================================
           INFO CARD
           ============================================================ */
        .info-card {
            background: var(--fleck-50);
            padding: 2.5rem;
            border-radius: var(--radius);
            border: 1px solid var(--line);
        }
        .info-card h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: 1.4rem;
            margin-bottom: 1.8rem;
            color: var(--ink-800);
        }
        .info-item {
            display: flex;
            gap: 1.2rem;
            margin-bottom: 1.5rem;
            align-items: flex-start;
        }
        .info-item i {
            font-size: 1.3rem;
            color: var(--brass-500);
            width: 36px;
            margin-top: 0.2rem;
            flex-shrink: 0;
        }
        .info-item strong {
            display: block;
            font-weight: 600;
            color: var(--ink-800);
        }
        .info-item p,
        .info-item span {
            color: var(--ink-600);
            font-size: 0.92rem;
        }

        /* ============================================================
           WORKSHOP SHOWCASE
           ============================================================ */
        .workshop-showcase {
            margin: 2rem 0 1.5rem;
        }
        .workshop-showcase h3 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 1rem;
            color: var(--ink-800);
        }
        .workshop-showcase .gallery {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.6rem;
        }
        .workshop-showcase .gallery img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            border-radius: var(--radius);
            transition: transform 0.4s ease;
        }
        .workshop-showcase .gallery img:hover {
            transform: scale(1.03);
        }
        .workshop-showcase .gallery img:first-child {
            grid-column: 1 / 3;
            aspect-ratio: 8/3;
        }

        /* ============================================================
           MAP
           ============================================================ */
        .map-placeholder {
            margin-top: 1.5rem;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--stone-200);
            height: 180px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ink-400);
            font-size: 0.85rem;
            border: 1px solid var(--line);
            gap: 0.6rem;
        }
        .map-placeholder i {
            font-size: 1.3rem;
            color: var(--brass-500);
        }

        /* ============================================================
           FORM
           ============================================================ */
        .form-card {
            background: var(--fleck-50);
            padding: 2.5rem;
            border-radius: var(--radius);
            border: 1px solid var(--line);
        }
        .form-card h2 {
            font-family: var(--serif);
            font-weight: 600;
            font-size: 1.4rem;
            margin-bottom: 0.4rem;
            color: var(--ink-800);
        }
        .form-card .sub {
            color: var(--ink-400);
            font-size: 0.9rem;
            margin-bottom: 1.8rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--ink-600);
            margin-bottom: 0.3rem;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 0.9rem 1.1rem;
            border-radius: var(--radius);
            border: 1px solid var(--line);
            font-family: var(--sans);
            font-size: 0.9rem;
            background: var(--stone-50);
            color: var(--ink-800);
            transition: border-color 0.2s ease;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--brass-500);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }
        .btn-submit {
            background: var(--basalt-900);
            color: var(--fleck-50);
            padding: 1rem 2rem;
            width: 100%;
            font-weight: 700;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            border-radius: var(--radius);
            transition: background 0.2s ease, transform 0.2s ease;
            border: none;
        }
        .btn-submit:hover {
            background: var(--brass-500);
            transform: translateY(-2px);
        }
        .form-note {
            font-size: 0.75rem;
            color: var(--ink-400);
            margin-top: 0.8rem;
            text-align: center;
        }
        .form-note i {
            color: var(--verde-600);
        }

        /* ============================================================
           FOOTER
           ============================================================ */
        footer {
            background: var(--basalt-900);
            color: rgba(250, 247, 239, 0.7);
            padding: 3.5rem 2.5rem 1.5rem;
            margin-top: 2rem;
        }
        .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) {
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .workshop-showcase .gallery {
                grid-template-columns: 1fr 1fr;
            }
            .workshop-showcase .gallery img:first-child {
                grid-column: 1 / 3;
                aspect-ratio: 8/3;
            }
            .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;
            }
            .contact-section {
                padding: 2.5rem 1.3rem;
            }
            .info-card,
            .form-card {
                padding: 1.8rem 1.3rem;
            }
            .workshop-showcase .gallery {
                grid-template-columns: 1fr;
            }
            .workshop-showcase .gallery img:first-child {
                grid-column: 1;
                aspect-ratio: 4/3;
            }
            footer {
                padding: 2.5rem 1.3rem 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .float-icons {
                bottom: 5.2rem;
                right: 1rem;
            }
        }