:root {
            --bg-primary: #090C10;
            --bg-secondary: #0F1318;
            --bg-card: #161B22;
            --accent-primary: #C9A227;
            --accent-secondary: #DDB94A;
            --accent-hover: #A8871F;
            --text-on-accent: #090C10;
            --text-primary: #F0F2F5;
            --text-muted: #8B949E;
            --border: rgba(255, 255, 255, 0.08);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
            --radius: 10px;
            --radius-lg: 14px;
            --transition: 0.25s ease;
            --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --dirty-bg: #1C1914;
            --dirty-border: rgba(110, 98, 72, 0.4);
            --dirty-fade: rgba(28, 25, 20, 0.5);
            --validated-bg: rgba(201, 162, 39, 0.06);
            --validated-border: rgba(154, 148, 102, 0.32);
            --validated-strong-bg: rgba(201, 162, 39, 0.1);
            --validated-strong-border: rgba(201, 162, 39, 0.38);
            --validated-text: #A8A07A;
            --validated-label: #9A9478;
        }

        html {
            scroll-behavior: auto;
            scroll-padding-top: 88px;
            width: 100%;
            scrollbar-gutter: stable;
        }

        html.lenis, html.lenis body {
            height: auto;
        }

        .lenis.lenis-smooth {
            scroll-behavior: auto !important;
        }

        .lenis.lenis-stopped {
            overflow: hidden;
        }

        .lenis [data-lenis-prevent] {
            overscroll-behavior: contain;
        }

        @media (prefers-reduced-motion: reduce) {
            html { scroll-behavior: auto; }
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 1rem;
            line-height: 1.65;
            letter-spacing: 0.01em;
            -webkit-font-smoothing: antialiased;
            width: 100%;
            position: relative;
            top: 0 !important;
        }

        body.modal-open {
            overflow: hidden !important;
            padding-right: 0 !important;
        }

        img, svg, video {
            max-width: 100%;
            height: auto;
        }

        h1, h2, h3, h4, h5, h6 {
            letter-spacing: 0.02em;
        }

        ::selection {
            background-color: rgba(201, 162, 39, 0.35);
            color: var(--text-primary);
        }

        /* ── Animations ── */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes validatedPulse {
            0%, 100% { border-color: rgba(201, 162, 39, 0.35); }
            50% { border-color: rgba(201, 162, 39, 0.65); }
        }

        .hero-animate {
            animation: fadeUp 0.7s ease both;
        }

        .hero-animate:nth-child(1) { animation-delay: 0.05s; }
        .hero-animate:nth-child(2) { animation-delay: 0.15s; }
        .hero-animate:nth-child(3) { animation-delay: 0.25s; }
        .hero-animate:nth-child(4) { animation-delay: 0.35s; }

        .reveal {
            opacity: 0;
            transform: translate3d(0, 20px, 0);
            transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                        transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
            will-change: opacity, transform;
        }

        .reveal.is-visible {
            opacity: 1;
            transform: translate3d(0, 0, 0);
            will-change: auto;
        }

        .reveal-delay-1 { transition-delay: 0.08s; }
        .reveal-delay-2 { transition-delay: 0.16s; }
        .reveal-delay-3 { transition-delay: 0.24s; }
        .reveal-delay-4 { transition-delay: 0.32s; }

        /* ── Navigation ── */
        .navbar {
            background-color: var(--bg-primary);
            border-bottom: 1px solid transparent;
            padding: 1rem 0;
            transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .navbar.scrolled {
            border-bottom-color: var(--border);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            color: var(--text-primary) !important;
            text-decoration: none;
        }

        .brand-lockup {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            min-width: 0;
        }

        .brand-wordmark {
            font-family: var(--font-sans, 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif);
            font-size: 1.0625rem;
            font-weight: 600;
            letter-spacing: -0.02em;
            line-height: 1;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-name {
            font-weight: 600;
            font-size: 1.0625rem;
            letter-spacing: -0.02em;
        }

        .brand-byline {
            font-size: 0.6875rem;
            font-weight: 400;
            color: var(--accent-secondary);
            letter-spacing: 0.01em;
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            display: block;
            flex-shrink: 0;
            object-fit: contain;
        }

        .nav-link {
            color: var(--text-muted) !important;
            font-size: 0.9375rem;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            transition: color var(--transition);
            position: relative;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0.25rem;
            left: 1rem;
            right: 1rem;
            height: 1px;
            background-color: var(--accent-primary);
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--text-primary) !important;
        }

        .navbar-tools {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .language-switcher {
            min-width: 138px;
            height: 40px;
            padding: 0 2.25rem 0 0.875rem;
            border: 1px solid var(--border);
            border-radius: 6px;
            background-color: rgba(22, 27, 34, 0.9);
            color: var(--text-primary);
            font-size: 0.875rem;
            font-weight: 500;
            appearance: none;
            -webkit-appearance: none;
            background-image:
                linear-gradient(45deg, transparent 50%, var(--accent-secondary) 50%),
                linear-gradient(135deg, var(--accent-secondary) 50%, transparent 50%);
            background-position:
                calc(100% - 18px) 17px,
                calc(100% - 12px) 17px;
            background-size: 6px 6px, 6px 6px;
            background-repeat: no-repeat;
            transition: border-color var(--transition), background-color var(--transition);
        }

        .language-switcher:hover,
        .language-switcher:focus {
            border-color: rgba(201, 162, 39, 0.3);
            background-color: rgba(22, 27, 34, 1);
            outline: none;
        }

        .translate-gadget,
        #google_translate_element {
            position: absolute !important;
            left: -9999px !important;
            top: 0 !important;
            width: 1px !important;
            height: 1px !important;
            overflow: hidden !important;
            clip: rect(0, 0, 0, 0) !important;
        }

        .translate-gadget .goog-te-gadget,
        .translate-gadget .goog-te-gadget-simple,
        .translate-gadget .goog-te-combo {
            display: block !important;
            visibility: visible !important;
            opacity: 0 !important;
            pointer-events: none !important;
            position: absolute !important;
            left: -9999px !important;
        }

        /* Hide Google banner / tooltip chrome only */
        .goog-te-banner-frame,
        .goog-te-banner-frame.skiptranslate,
        iframe.goog-te-banner-frame,
        iframe.skiptranslate,
        #goog-gt-tt,
        .goog-te-balloon-frame,
        .goog-tooltip,
        .VIpgJd-ZVi9od-ORHb-OEVmcd {
            display: none !important;
            visibility: hidden !important;
            height: 0 !important;
            max-height: 0 !important;
            overflow: hidden !important;
        }

        html.translated-ltr,
        html.translated-rtl {
            margin-top: 0 !important;
        }

        .navbar-container {
            align-items: center;
        }

        .navbar-lang {
            flex-shrink: 0;
        }

        @media (max-width: 991.98px) {
            .navbar-container {
                display: grid;
                grid-template-columns: minmax(0, 1fr) auto auto;
                grid-template-rows: auto auto;
                align-items: center;
                gap: 0.5rem 0.625rem;
            }

            .navbar-container > .navbar-brand {
                grid-column: 1;
                grid-row: 1;
                min-width: 0;
                margin-right: 0;
            }

            .navbar-container > .navbar-lang {
                grid-column: 2;
                grid-row: 1;
                min-width: 0;
                width: 6.5rem;
                max-width: 6.5rem;
                font-size: 0.8125rem;
                padding-right: 1.5rem;
                margin-left: 0;
            }

            .navbar-container > .navbar-toggler {
                grid-column: 3;
                grid-row: 1;
            }

            .navbar-container > .navbar-collapse {
                grid-column: 1 / -1;
                grid-row: 2;
                width: 100%;
            }
        }

        @media (min-width: 992px) {
            .navbar-container {
                display: flex;
                flex-wrap: nowrap;
                align-items: center;
            }

            .navbar-container > .navbar-brand {
                order: 1;
                flex: 0 0 auto;
            }

            .navbar-container > .navbar-toggler {
                display: none;
            }

            .navbar-container > .navbar-lang {
                order: 3;
                flex: 0 0 auto;
                margin-left: 0.75rem;
            }

            .navbar-container > .navbar-collapse {
                order: 2;
                flex: 1 1 auto;
                display: flex !important;
                align-items: center;
            }
        }

        .btn-primary-custom {
            background-color: var(--accent-primary);
            color: var(--text-on-accent);
            border: none;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 0.625rem 1.375rem;
            border-radius: 6px;
            transition: background-color var(--transition), transform var(--transition);
        }

        .btn-primary-custom:hover {
            background-color: var(--accent-hover);
            color: var(--text-on-accent);
            transform: translateY(-1px);
        }

        .btn-outline-custom {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
            font-weight: 500;
            font-size: 0.9375rem;
            padding: 0.625rem 1.375rem;
            border-radius: 6px;
            transition: border-color var(--transition), background-color var(--transition), transform var(--transition);
        }

        .btn-outline-custom:hover {
            border-color: rgba(201, 162, 39, 0.35);
            background-color: rgba(201, 162, 39, 0.06);
            color: var(--text-primary);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border-color: var(--border);
            padding: 0.375rem 0.625rem;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28240, 242, 245, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ── Sections ── */
        section {
            padding: 6rem 0;
        }

        .section-alt {
            background-color: var(--bg-secondary);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.625rem;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-secondary);
            margin-bottom: 1rem;
        }

        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background-color: var(--accent-primary);
            flex-shrink: 0;
        }

        .section-title {
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            font-weight: 700;
            letter-spacing: 0.02em;
            line-height: 1.15;
            margin-bottom: 1rem;
        }

        .section-subtitle {
            font-size: 1.0625rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
            font-weight: 400;
        }

        /* ── Hero ── */
        .hero {
            padding: 8rem 0 7rem;
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            max-width: 100%;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 48px 48px;
            mask-image: radial-gradient(ellipse 70% 60% at 30% 40%, black 20%, transparent 70%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 500;
            color: var(--accent-secondary);
            border: 1px solid rgba(201, 162, 39, 0.25);
            background-color: rgba(201, 162, 39, 0.06);
            padding: 0.4375rem 1rem;
            border-radius: 100px;
            margin-bottom: 1.75rem;
        }

        .hero-badge strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        .hero-headline {
            font-size: clamp(2rem, 5vw, 3.25rem);
            font-weight: 700;
            letter-spacing: 0.01em;
            line-height: 1.12;
            margin-bottom: 1.5rem;
        }

        .hero-subheadline {
            font-size: clamp(1rem, 2vw, 1.1875rem);
            color: var(--text-muted);
            max-width: 580px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
            font-weight: 400;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .hero-actions .btn-primary-custom,
        .hero-actions .btn-outline-custom {
            padding: 0.75rem 1.75rem;
            font-size: 1rem;
        }

        /* Hero — raw → review → validated pipeline */
        .data-pipeline {
            width: 100%;
            max-width: 380px;
            margin-left: auto;
            margin-right: 0;
            border: 1px solid var(--border);
            border-radius: 6px;
            background-color: rgba(15, 19, 24, 0.6);
            padding: 1rem;
            overflow: hidden;
        }

        @media (min-width: 992px) {
            .hero .row {
                --bs-gutter-x: 2.5rem;
            }

            .hero .col-lg-5 {
                display: flex;
                justify-content: flex-start;
                align-items: center;
            }

            .data-pipeline {
                margin-left: 0;
                max-width: 380px;
                width: 100%;
            }
        }

        .pipeline-labels {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 0.5rem;
            margin-bottom: 0.875rem;
            font-size: 0.625rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
        }

        .pipeline-labels span:first-child { color: #7A7260; }
        .pipeline-labels span:nth-child(2) { color: var(--accent-secondary); text-align: center; }
        .pipeline-labels span:last-child { color: var(--validated-label); text-align: right; }

        .pipeline-body {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 0.625rem;
            align-items: stretch;
        }

        .pipeline-raw,
        .pipeline-clean {
            min-height: 200px;
            overflow: hidden;
        }

        .dirty-grid,
        .clean-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 4px;
            height: 100%;
        }

        .dirty-grid .unit,
        .clean-grid .unit {
            border-radius: 2px;
            min-height: 18px;
        }

        .dirty-grid .unit {
            background-color: var(--dirty-bg);
            border: 1px solid var(--dirty-border);
        }

        .dirty-grid .unit.noise {
            background-image: repeating-linear-gradient(
                -45deg,
                transparent,
                transparent 2px,
                rgba(90, 80, 60, 0.15) 2px,
                rgba(90, 80, 60, 0.15) 4px
            );
            background-color: #221F19;
        }

        .dirty-grid .unit.faded {
            opacity: 0.35;
            border-style: dashed;
        }

        .dirty-grid .unit.skew {
            transform: rotate(-3deg) scale(0.92);
        }

        .dirty-grid .unit.offset {
            transform: translateY(3px);
        }

        .dirty-grid .unit.wide { grid-column: span 2; }
        .dirty-grid .unit.tall { grid-row: span 2; }

        .pipeline-filter {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.375rem;
            padding: 0 0.25rem;
        }

        .filter-track {
            width: 2px;
            flex: 1;
            min-height: 120px;
            background: linear-gradient(
                to bottom,
                #5C5444 0%,
                var(--accent-primary) 45%,
                var(--accent-primary) 55%,
                var(--validated-label) 100%
            );
            border-radius: 1px;
        }

        .filter-badge {
            font-size: 0.5625rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-on-accent);
            background-color: var(--accent-primary);
            padding: 0.25rem 0.375rem;
            border-radius: 2px;
            white-space: nowrap;
        }

        .filter-arrow {
            color: var(--accent-primary);
            font-size: 0.75rem;
            line-height: 1;
        }

        .clean-grid .unit {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
        }

        .clean-grid .unit.validated,
        .clean-grid .unit.validated-strong {
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .clean-grid .unit.validated {
            background-color: var(--validated-bg);
            border: 1px solid var(--validated-border);
        }

        .clean-grid .unit.validated-strong {
            background-color: var(--validated-strong-bg);
            border: 1px solid var(--validated-strong-border);
            box-shadow: inset 0 0 0 1px rgba(201, 162, 39, 0.08);
        }

        .clean-grid .unit-tag {
            font-size: 0.4375rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--validated-text);
            line-height: 1;
            pointer-events: none;
            user-select: none;
        }

        .clean-grid .unit.validated-strong .unit-tag {
            font-size: 0.5rem;
            letter-spacing: 0.06em;
        }

        .clean-grid .unit.wide .unit-tag,
        .clean-grid .unit.tall .unit-tag {
            font-size: 0.5rem;
        }

        .clean-grid .unit.rejected {
            background-color: transparent;
            border: 1px dashed rgba(255, 255, 255, 0.06);
            opacity: 0.25;
        }

        .clean-grid .unit.wide { grid-column: span 2; }
        .clean-grid .unit.tall { grid-row: span 2; }

        .pipeline-footer {
            display: flex;
            justify-content: space-between;
            margin-top: 0.75rem;
            padding-top: 0.75rem;
            border-top: 1px solid var(--border);
            font-size: 0.625rem;
            font-weight: 500;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--text-muted);
        }

        .pipeline-footer .status {
            color: var(--validated-label);
        }

        .pipeline-footer .status::before {
            content: '■ ';
            font-size: 0.5rem;
            vertical-align: middle;
        }

        @media (max-width: 991.98px) {
            .pipeline-raw,
            .pipeline-clean {
                min-height: 140px;
            }

            .filter-track {
                min-height: 80px;
            }
        }

        /* ── Cards ── */
        .card-custom {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            height: 100%;
            box-shadow: var(--shadow);
            transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        .card-custom:hover {
            border-color: rgba(201, 162, 39, 0.22);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .card-icon {
            width: 44px;
            height: 44px;
            background-color: rgba(201, 162, 39, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.25rem;
            color: var(--accent-secondary);
        }

        .card-icon svg {
            width: 22px;
            height: 22px;
        }

        .card-title {
            font-size: 1.0625rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .card-text {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ── About ── */
        .about-text {
            font-size: 1.0625rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 1.25rem;
        }

        .about-attribution {
            font-size: 0.875rem;
            color: var(--accent-secondary);
            font-weight: 500;
            margin-bottom: 2.5rem;
        }

        .focus-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 0.875rem;
        }

        .focus-list li {
            display: flex;
            align-items: center;
            gap: 0.875rem;
            font-size: 0.9375rem;
            color: var(--text-primary);
            padding: 0.875rem 1rem;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background-color: var(--bg-card);
            transition: border-color var(--transition);
        }

        .focus-list li:hover {
            border-color: rgba(201, 162, 39, 0.2);
        }

        .focus-list li::before {
            content: '';
            width: 6px;
            height: 6px;
            background-color: var(--accent-primary);
            border-radius: 2px;
            flex-shrink: 0;
        }

        /* ── Feature cards (Why) ── */
        .feature-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            height: 100%;
            box-shadow: var(--shadow);
            transition: border-color var(--transition), transform var(--transition);
        }

        .feature-card:hover {
            border-color: rgba(201, 162, 39, 0.2);
            transform: translateY(-2px);
        }

        .feature-card h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.625rem;
            letter-spacing: -0.01em;
        }

        .feature-card p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.65;
        }

        /* ── Workflow ── */
        .workflow-container {
            max-width: 560px;
            margin: 0 auto;
        }

        .workflow-step {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.5rem 2rem;
            text-align: center;
            box-shadow: var(--shadow);
            transition: border-color var(--transition);
        }

        .workflow-step.is-visible {
            border-color: rgba(201, 162, 39, 0.15);
        }

        .workflow-step h4 {
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 0;
            letter-spacing: -0.01em;
        }

        .workflow-arrow {
            display: flex;
            justify-content: center;
            padding: 0.75rem 0;
            color: var(--accent-primary);
            animation: fadeIn 0.5s ease both;
        }

        .workflow-arrow svg {
            width: 20px;
            height: 20px;
            opacity: 0.6;
        }

        /* ── Contributor CTA ── */
        .contributor-cta {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 4rem 3rem;
            text-align: center;
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
            transition: border-color 0.4s ease;
        }

        .contributor-cta::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--accent-primary);
            transform: scaleX(0);
            transition: transform 0.5s ease;
        }

        .contributor-cta.is-visible::before {
            transform: scaleX(1);
        }

        .contributor-cta h2 {
            font-size: clamp(1.5rem, 4vw, 2rem);
            font-weight: 700;
            letter-spacing: -0.03em;
            margin-bottom: 1rem;
        }

        .contributor-cta p {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }

        /* ── Contact Form ── */
        .form-control-custom {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-primary);
            padding: 0.75rem 1rem;
            font-size: 16px;
            font-family: var(--font-sans);
            transition: border-color var(--transition), box-shadow var(--transition);
            max-width: 100%;
        }

        select.form-control-custom {
            font-size: 16px;
        }

        .form-control-custom::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }

        .form-control-custom:focus {
            background-color: var(--bg-card);
            border-color: rgba(201, 162, 39, 0.45);
            color: var(--text-primary);
            box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.1);
        }

        .form-label-custom {
            font-size: 0.8125rem;
            font-weight: 500;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }

        .form-alert {
            font-size: 0.875rem;
            padding: 0.75rem 1rem;
            border-radius: 6px;
            margin-bottom: 1rem;
            display: none;
        }

        .form-alert.show { display: block; }
        .form-alert.success {
            background-color: rgba(201, 162, 39, 0.1);
            border: 1px solid rgba(201, 162, 39, 0.3);
            color: var(--accent-secondary);
        }
        .form-alert.error {
            background-color: rgba(220, 80, 80, 0.1);
            border: 1px solid rgba(220, 80, 80, 0.3);
            color: #f0a0a0;
        }

        /* Modal */
        .modal-custom .modal-dialog {
            max-height: calc(100vh - 2rem);
            margin: 1rem auto;
        }

        .modal {
            overflow-x: hidden;
        }

        .modal-custom .modal-content {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-primary);
            max-height: calc(100vh - 2rem);
            display: flex;
            flex-direction: column;
        }

        .modal-custom .modal-header {
            border-bottom: 1px solid var(--border);
            padding: 1.25rem 1.5rem;
            flex-shrink: 0;
        }

        .modal-custom .modal-title {
            font-size: 1rem;
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        .modal-custom .btn-close {
            filter: invert(1);
            opacity: 0.6;
        }

        .modal-custom form {
            display: flex;
            flex-direction: column;
            min-height: 0;
            flex: 1;
        }

        .modal-custom .modal-body {
            padding: 1.5rem;
            overflow-y: auto;
            overflow-x: hidden;
            -webkit-overflow-scrolling: touch;
            overscroll-behavior: contain;
            touch-action: pan-y;
            max-height: calc(100vh - 220px);
        }

        .modal-custom .modal-footer {
            border-top: 1px solid var(--border);
            padding: 1rem 1.5rem;
            flex-shrink: 0;
        }

        .success-modal .modal-body {
            text-align: center;
            padding: 2rem 1.5rem;
            overflow: visible;
            max-height: none;
        }

        .success-modal .success-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 1.25rem;
            border-radius: 50%;
            background-color: rgba(201, 162, 39, 0.12);
            border: 1px solid rgba(201, 162, 39, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 1.5rem;
            font-weight: 700;
        }

        .success-modal .success-title {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .success-modal .success-text {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        .success-modal .modal-footer {
            justify-content: center;
            border-top: none;
            padding-top: 0;
            padding-bottom: 1.5rem;
        }

        /* ── Footer ── */
        footer {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 0 0 2rem;
            overflow: hidden;
        }

        .footer-stream-band {
            padding: 1.75rem 0;
            margin-bottom: 2.5rem;
            border-bottom: 1px solid var(--border);
            background-color: rgba(9, 12, 16, 0.5);
        }

        .stream-track {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0;
            margin-bottom: 1rem;
            padding: 0 0.5rem;
        }

        .stream-node {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
            border: 1px solid var(--border);
            background-color: var(--bg-card);
        }

        .stream-node.raw {
            background-color: var(--dirty-bg);
            border-color: var(--dirty-border);
        }

        .stream-node.review {
            background-color: var(--accent-primary);
            border-color: var(--accent-primary);
            box-shadow: 0 0 8px rgba(201, 162, 39, 0.35);
        }

        .stream-node.clean {
            background-color: var(--validated-strong-bg);
            border-color: var(--validated-strong-border);
        }

        .stream-connector {
            flex: 1;
            max-width: 2.5rem;
            height: 1px;
            background-color: rgba(255, 255, 255, 0.08);
        }

        .stream-connector.gold {
            background: linear-gradient(90deg, rgba(201, 162, 39, 0.15), var(--accent-primary));
        }

        .stream-connector.clean {
            background: linear-gradient(90deg, var(--accent-primary), var(--validated-border));
        }

        .footer-unit-tape {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 0.375rem 0.625rem;
            font-family: ui-monospace, 'Cascadia Code', 'Segoe UI Mono', monospace;
            font-size: 0.625rem;
            letter-spacing: 0.04em;
            color: var(--text-muted);
        }

        .tape-id {
            padding: 0.2rem 0.4rem;
            border-radius: 2px;
            background-color: rgba(28, 25, 20, 0.6);
            border: 1px solid var(--dirty-border);
            color: #8A8070;
        }

        .tape-id.reviewed {
            border-color: rgba(201, 162, 39, 0.35);
            color: var(--accent-secondary);
            background-color: rgba(201, 162, 39, 0.08);
        }

        .tape-id.validated {
            border-color: var(--validated-border);
            color: var(--validated-text);
            background-color: var(--validated-bg);
        }

        .tape-sep {
            color: rgba(255, 255, 255, 0.2);
            font-size: 0.5625rem;
        }

        .footer-main {
            padding-bottom: 2.5rem;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }

        .footer-brand .brand-name {
            font-size: 1.0625rem;
        }

        .footer-tagline {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
            max-width: 28rem;
        }

        .footer-byline {
            font-size: 0.8125rem;
            color: var(--accent-secondary);
            font-weight: 500;
            margin-bottom: 1.25rem;
        }

        .footer-email {
            display: inline-block;
            font-size: 0.9375rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-email:hover {
            color: var(--accent-secondary);
        }

        .footer-nav-title {
            font-size: 0.6875rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }

        .footer-nav-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-nav-links li + li {
            margin-top: 0.35rem;
        }

        .footer-nav-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9375rem;
            font-weight: 500;
            transition: color var(--transition);
        }

        .footer-nav-links a:hover {
            color: var(--accent-secondary);
        }

        .footer-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0.625rem;
            margin-bottom: 1rem;
        }

        .footer-metric {
            text-align: center;
            padding: 0.875rem 0.5rem;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background-color: var(--bg-card);
        }

        .footer-metric-num {
            display: block;
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--accent-secondary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .footer-metric-lbl {
            display: block;
            font-size: 0.5625rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        .footer-ratio-bar {
            display: flex;
            height: 6px;
            border-radius: 3px;
            overflow: hidden;
            background-color: rgba(255, 255, 255, 0.04);
            margin-bottom: 0.5rem;
        }

        .ratio-segment.raw {
            width: 28%;
            background-color: rgba(90, 80, 60, 0.45);
        }

        .ratio-segment.review {
            width: 18%;
            background-color: var(--accent-primary);
        }

        .ratio-segment.clean {
            width: 54%;
            background: linear-gradient(90deg, rgba(201, 162, 39, 0.5), var(--validated-border));
        }

        .footer-ratio-labels {
            display: flex;
            justify-content: space-between;
            font-size: 0.5625rem;
            font-weight: 500;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--text-muted);
        }

        .footer-ratio-labels span:last-child {
            color: var(--validated-label);
        }

        .footer-bottom {
            padding-top: 1.75rem;
            border-top: 1px solid var(--border);
            font-size: 0.8125rem;
            color: var(--text-muted);
            text-align: center;
        }

        @media (max-width: 991.98px) {
            .footer-stream-band {
                padding: 1.25rem 0 1.5rem;
                margin-bottom: 2rem;
            }

            .stream-connector {
                max-width: 1.25rem;
            }

            .footer-metrics {
                margin-top: 0.5rem;
            }
        }

        @media (max-width: 575.98px) {
            .footer-unit-tape {
                font-size: 0.5625rem;
                gap: 0.25rem 0.375rem;
            }

            .footer-metric-num {
                font-size: 1rem;
            }
        }

        /* ── Back to top ── */
        .back-to-top {
            position: fixed;
            right: 1.25rem;
            bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
            z-index: 1040;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(201, 162, 39, 0.35);
            border-radius: var(--radius);
            background-color: rgba(15, 19, 24, 0.92);
            color: var(--accent-secondary);
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            background-color: var(--accent-primary);
            border-color: var(--accent-primary);
            color: var(--text-on-accent);
        }

        .back-to-top:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }

        .back-to-top svg {
            width: 18px;
            height: 18px;
            fill: currentColor;
        }

        /* ── Responsive ── */
        @media (max-width: 991.98px) {
            html, body {
                overflow-x: clip;
            }

            .hero {
                padding: 6rem 0 5rem;
                min-height: auto;
            }

            section {
                padding: 4.5rem 0;
                overflow-x: clip;
            }

            .contributor-cta {
                padding: 3rem 2rem;
            }

            .data-pipeline {
                margin: 3.5rem auto 0;
                max-width: min(340px, 100%);
            }

            .navbar-tools {
                width: 100%;
                margin-top: 0.75rem;
            }

            .modal {
                padding: 0 !important;
            }

            .modal-custom .modal-dialog {
                margin: 0.75rem auto;
                max-width: calc(100% - 1.5rem);
                width: 100%;
            }
        }

        @media (max-width: 575.98px) {
            .hero-actions {
                flex-direction: column;
            }

            .navbar-tools {
                flex-direction: column;
                align-items: stretch;
            }

            .navbar-tools .btn {
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }

            .navbar .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }