@import url('tokens.css');

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-primary);
            font-size: var(--body-md);
            line-height: 1.6;
            color: var(--text-color);
            background: var(--body-color);
            transition: background-color var(--transition), color var(--transition);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        h1, h2, h3, h4 { line-height: 1.15; font-weight: 700; margin-bottom: var(--space-sm); }
        h1 { font-size: var(--headline-xl); letter-spacing: -0.03em; }
        h2 { font-size: var(--headline-lg); letter-spacing: -0.02em; }
        h3 { font-size: var(--headline-md); }
        h4 { font-size: var(--headline-sm); }
        p { color: var(--text-color-secondary); margin-bottom: var(--space-md); }
        .text-large { font-size: var(--body-lg); line-height: 1.7; }

        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }

        /* Reveal animation */
        .reveal {
            opacity: 0;
            transform: translateY(32px);
            transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }
        .reveal-delay-4 { transition-delay: 0.4s; }
        .reveal-delay-5 { transition-delay: 0.5s; }

        /* ─── Nav ─── */
        .nav {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        [data-theme="dark"] .nav { background: rgba(11, 13, 17, 0.85); }
        .nav-container { display: flex; justify-content: space-between; align-items: center; padding: 1rem var(--space-md); }
        .nav-logo {
            text-decoration: none;
            display: flex; align-items: baseline; gap: 0.4rem;
        }
        .nav-logo .by-line {
            font-size: 0.55rem;
            color: var(--text-color-muted);
            letter-spacing: 0.08em;
            font-weight: 400;
            text-transform: lowercase;
        }
        .nav-logo .product-name {
            color: var(--text-color); font-family: 'TASA Orbiter', sans-serif;
            font-weight: 700; letter-spacing: 0.02em; font-size: 2.2rem;
            line-height: 1;
            position: relative; top: -5px;
        }
        /* Brand mark styling for inline "y" in body text */
        .brand-y {
            font-family: 'TASA Orbiter', sans-serif;
            font-weight: 700;
            letter-spacing: 0.02em;
            font-size: 1.25em;
            line-height: 0;
        }
        .nav-menu { display: flex; gap: var(--space-lg); align-items: center; list-style: none; }
        .nav-link {
            color: var(--text-color-muted); text-decoration: none;
            font-size: var(--body-sm); font-family: var(--font-mono); font-weight: 500;
            text-transform: uppercase; letter-spacing: 0.05em;
            position: relative; transition: color var(--transition);
        }
        .nav-link:hover { color: var(--text-color); }

        .btn {
            display: inline-flex; align-items: center; justify-content: center;
            padding: 0.8rem 1.75rem; gap: 0.5rem;
            font-size: var(--body-sm); font-family: var(--font-mono);
            font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase;
            text-decoration: none; border: none; cursor: pointer;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .btn-primary {
            background: var(--accent-color); color: white;
            box-shadow: 0 2px 12px rgba(74, 158, 255, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-soft);
            box-shadow: 0 4px 20px rgba(74, 158, 255, 0.4);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--body-color-soft); color: var(--text-color);
            border: 1px solid var(--border-color);
        }
        .btn-secondary:hover {
            background: var(--body-color-deep);
            transform: translateY(-2px);
        }

        .theme-toggle {
            background: var(--body-color-soft); border: 1px solid var(--border-color);
            width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
            display: flex; align-items: center; justify-content: center;
            font-size: 0.85rem;
            transition: all var(--transition);
        }
        .theme-toggle:hover { background: var(--accent-light); }

        section { padding: var(--space-3xl) 0; position: relative; }

        /* ─── Hero ─── */
        .hero {
            min-height: auto;
            position: relative;
            padding-top: 120px;
            padding-bottom: var(--space-md);
            overflow: hidden;
            background: var(--gradient-hero);
        }
        .hero-flex {
            position: relative;
            display: flex;
            align-items: stretch;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-padding);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(238,240,244,0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(238,240,244,0.02) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to bottom, transparent, var(--body-color));
            pointer-events: none;
            z-index: 3;
        }
        .hero-noise {
            position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: 0.025;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
        }
        [data-theme="dark"] .hero-noise { opacity: 0.06; }
        .hero-inner {
            position: relative; z-index: 4;
            text-align: left;
            padding: var(--space-lg) 0;
            width: 38.2%; flex-shrink: 0;
            display: flex; flex-direction: column; justify-content: center;
        }
        .hero-label {
            font-family: var(--font-mono); font-size: var(--caption);
            font-weight: 500; text-transform: uppercase; letter-spacing: 0.12em;
            color: var(--accent-color); margin-bottom: var(--space-sm);
            display: inline-flex; align-items: center; gap: 0.6rem; width: fit-content;
            background: var(--accent-light);
            padding: 0.4rem 0.9rem;
            border-radius: 100px;
            border: 1px solid rgba(74, 158, 255, 0.15);
        }
        .hero-label .pulse {
            width: 7px; height: 7px; border-radius: 50%;
            background: var(--accent-color); display: inline-block;
            animation: pulse 2s ease-in-out infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--accent-glow); }
            50% { opacity: 0.6; box-shadow: 0 0 0 8px transparent; }
        }
        .hero h1 { margin-bottom: var(--space-md); color: var(--text-color); font-size: clamp(1.8rem, 3.2vw, 3.2rem); line-height: 1.2; }
        .hero h1 em {
            font-style: normal;
            background: linear-gradient(135deg, var(--accent-color), var(--accent-soft));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-description {
            font-size: var(--body-md); color: var(--text-color-secondary);
            margin-bottom: var(--space-lg); max-width: 400px; line-height: 1.65;
        }
        .hero-actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }

        .hero-ticker {
            margin-top: var(--space-md);
            display: flex; flex-wrap: wrap; gap: 0.35rem;
            justify-content: flex-start;
        }
        .hero-ticker span {
            font-family: var(--font-mono); font-size: 0.7rem;
            font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em;
            color: var(--text-color-muted);
            padding: 0.35rem 0.75rem;
            background: var(--body-color-soft);
            border: 1px solid var(--border-color);
            border-radius: 100px;
            transition: all var(--transition);
        }
        .hero-ticker span:hover {
            border-color: var(--accent-color); color: var(--accent-color);
            background: var(--accent-light);
        }

        /* ─── Hero 3D — Full-bleed background layer ─── */
        .hero-scene {
            position: relative;
            flex: 1;
            min-height: 500px;
            z-index: 1;
            overflow: hidden;
        }
        .hero-scene canvas {
            position: absolute;
            inset: 0;
            width: 100% !important;
            height: 100% !important;
        }
        .scene-labels {
            position: absolute; inset: 0;
            pointer-events: none; z-index: 1;
            overflow: hidden;
        }
        .scene-label {
            position: absolute;
            font-family: var(--font-mono);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            padding: 0.35rem 0.85rem;
            border-radius: 100px;
            white-space: nowrap;
            background: rgba(0, 0, 0, 0.92);
            border: 1px solid rgba(255,255,255,0.18);
            backdrop-filter: blur(8px);
            pointer-events: none;
            box-shadow: 0 0 12px rgba(0,0,0,0.4);
            /* animation set by JS per element */
        }
        body:not([data-theme="dark"]) .scene-label {
            background: rgba(255, 255, 255, 0.85);
            border-color: rgba(0,0,0,0.08);
            color: var(--text-color);
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }
        .scene-label.red { color: #f06060; border-color: rgba(240,96,96,0.25); }
        .scene-label.amber { color: #e0a82e; border-color: rgba(224,168,46,0.25); }
        .scene-label.green { color: #22c55e; border-color: rgba(34,197,94,0.25); }
        .scene-label.blue { color: #60a5fa; border-color: rgba(96,165,250,0.25); }
        body:not([data-theme="dark"]) .scene-label.red { color: #c0312b; border-color: rgba(192,49,43,0.2); }
        body:not([data-theme="dark"]) .scene-label.amber { color: #a67a10; border-color: rgba(166,122,16,0.2); }
        body:not([data-theme="dark"]) .scene-label.green { color: #15803d; border-color: rgba(21,128,61,0.2); }
        body:not([data-theme="dark"]) .scene-label.blue { color: #2563eb; border-color: rgba(37,99,235,0.2); }

        /* Center label — now rendered in Three.js, CSS hidden */
        .scene-core-label {
            display: none;
            position: absolute;
            left: 68%; top: 50%;
            transform: translate(-50%, -50%);
            z-index: 3;
            font-family: 'TASA Orbiter', sans-serif;
            font-size: 2.4rem; font-weight: 700;
            letter-spacing: 0; text-transform: none;
            color: rgba(255,255,255,0.35);
            text-shadow: 0 0 24px rgba(74,158,255,0.3);
            pointer-events: none;
            animation: breathe 4s ease-in-out infinite;
        }
        @keyframes breathe {
            0%, 100% { opacity: 0.35; transform: translate(-50%, -50%) scale(1); }
            50% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.08); }
        }

        /* Insight emission — emerges from core center */
        .scene-insight-emitter {
            position: absolute;
            left: 50%; top: 50%;
            transform: translate(-50%, -50%);
            z-index: 5;
            display: flex;
            flex-direction: column;
            align-items: center;
            pointer-events: none;
        }

        /* Geometric seed — hexagonal shape born from core */
        .insight-seed {
            width: 18px; height: 18px;
            background: var(--accent-color);
            clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
            transform: scale(0) rotate(0deg);
            opacity: 0;
            box-shadow: 0 0 20px var(--accent-glow);
            transition: none;
            position: absolute;
        }

        /* The card — born from the seed, semitransparent */
        .scene-insight {
            background: rgba(0, 0, 0, 0.25);
            border: 1px solid rgba(74,158,255,0.12);
            border-radius: var(--radius-sm);
            padding: 0.9rem 1.4rem;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            text-align: center;
            max-width: 400px;
            width: max-content;
            opacity: 0;
            transform-origin: center center;
            position: absolute;
            top: 0; left: 50%;
            transform: translate(-50%, 0) scale(0);
        }

        .scene-insight-label {
            font-family: var(--font-mono); font-size: 0.55rem;
            text-transform: uppercase; letter-spacing: 0.12em;
            color: var(--accent-color); margin-bottom: 0.3rem;
            font-weight: 600;
        }
        .scene-insight-text {
            font-size: 0.88rem; font-weight: 500;
            color: rgba(255,255,255,0.88); line-height: 1.5;
        }
        body:not([data-theme="dark"]) .scene-insight {
            background: rgba(255, 255, 255, 0.75);
            border-color: rgba(0,0,0,0.08);
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }
        body:not([data-theme="dark"]) .scene-insight-text {
            color: var(--text-color);
        }

        @media (max-width: 960px) {
            .hero-flex { flex-direction: column; }
            .hero-inner {
                text-align: center;
                width: 100%;
                padding: var(--space-lg) var(--container-padding) var(--space-sm);
            }
            .hero-inner .hero-description { margin-left: auto; margin-right: auto; }
            .hero-ticker { justify-content: center; }
            .hero-actions { justify-content: center; }
            .hero h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); }
            .hero-scene {
                position: relative;
                width: 100%;
                height: 50vw;
                min-height: 280px;
                max-height: 400px;
            }
        }
        @media (max-width: 500px) {
            .scene-insight { max-width: 260px; }
        }

        /* ─── Data Spine — Layers ─── */
        .data-spine {
            padding: var(--space-3xl) 0;
            background: var(--body-color);
            position: relative;
            overflow: hidden;
        }
        .spine-heading {
            text-align: center;
            margin-bottom: var(--space-2xl);
        }
        .spine-heading .section-label {
            margin-bottom: var(--space-sm);
        }
        .spine-heading h2 {
            font-size: var(--headline-md);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Two-column layout: rings + cards, centered */
        .spine-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-lg);
            align-items: center;
            max-width: 860px;
            margin: 0 auto;
        }
        /* Ring visual */
        .spine-rings {
            position: relative;
            width: 380px; height: 380px;
            justify-self: end;
        }
        .spine-rings svg { width: 100%; height: 100%; }
        .sr-track { fill: none; stroke: var(--border-color); stroke-width: 10; opacity: 0.15; }
        .sr-arc {
            fill: none; stroke-width: 10; stroke-linecap: round;
            transition: stroke-dashoffset 1.6s cubic-bezier(0.22, 1, 0.36, 1),
                        opacity 0.35s ease, stroke-width 0.35s ease;
        }
        .sr-arc[data-layer="0"] { stroke: var(--accent-color); }  /* Store Performance */
        .sr-arc[data-layer="1"] { stroke: var(--green); }        /* Customer Voice */
        .sr-arc[data-layer="2"] { stroke: var(--amber); }        /* Market Intelligence */
        .sr-arc[data-layer="3"] { stroke: #a78bfa; }             /* Knowledge */
        .sr-arc[data-layer="4"] { stroke: #f472b6; }             /* EU Datasets */

        /* Shield ring */
        .sr-shield { fill: none; stroke: var(--accent-soft); stroke-width: 2.5; stroke-dasharray: 6 3; opacity: 0.65; }
        .spine-rings.animated .sr-shield { animation: sr-shield-spin 25s linear infinite; transform-origin: 190px 190px; }
        @keyframes sr-shield-spin { to { transform: rotate(360deg); } }
        .sr-shield-pulse { fill: none; stroke: var(--accent-color); stroke-width: 6; opacity: 0; }
        .spine-rings.animated .sr-shield-pulse { animation: sr-shield-p 3s ease-in-out infinite; }
        @keyframes sr-shield-p { 0%,100% { opacity: 0; } 50% { opacity: 0.1; } }

        /* Dim non-active layers on hover */
        .spine-layout.has-active .sr-arc { opacity: 0.12; stroke-width: 7; }
        .spine-layout.has-active .sr-track { opacity: 0.06; }
        .spine-layout.has-active .sr-arc.active { opacity: 1; stroke-width: 14; }
        .spine-layout.has-active .sr-track.active { opacity: 0.3; stroke-width: 12; }

        /* Layer cards (right side) */
        .spine-cards {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .spine-card {
            display: grid;
            grid-template-columns: 4px 1fr;
            gap: 0;
            cursor: pointer;
            transition: all 0.3s ease;
            border-radius: var(--radius-sm);
            position: relative;
        }
        .spine-card-bar {
            border-radius: 4px;
            transition: all 0.3s ease;
            opacity: 0.4;
        }
        .spine-card[data-layer="0"] .spine-card-bar { background: var(--accent-color); }
        .spine-card[data-layer="1"] .spine-card-bar { background: var(--green); }
        .spine-card[data-layer="2"] .spine-card-bar { background: var(--amber); }
        .spine-card[data-layer="3"] .spine-card-bar { background: #a78bfa; }
        .spine-card[data-layer="4"] .spine-card-bar { background: #f472b6; }

        .spine-card-body {
            padding: 1rem 1.25rem;
            transition: all 0.3s ease;
        }
        .spine-card-counter {
            font-family: var(--font-mono); font-weight: 700;
            font-size: 1.5rem; line-height: 1;
            margin-bottom: 0.25rem;
        }
        .spine-card[data-layer="0"] .spine-card-counter { color: var(--accent-color); }
        .spine-card[data-layer="1"] .spine-card-counter { color: var(--green); }
        .spine-card[data-layer="2"] .spine-card-counter { color: var(--amber); }
        .spine-card[data-layer="3"] .spine-card-counter { color: #a78bfa; }
        .spine-card[data-layer="4"] .spine-card-counter { color: #f472b6; }

        .spine-card-title {
            font-weight: 700; font-size: var(--body-sm);
            color: var(--text-color); margin-bottom: 0.2rem;
        }
        .spine-card-desc {
            font-size: var(--caption); line-height: 1.5;
            color: var(--text-color-muted);
            max-height: 0; overflow: hidden;
            transition: max-height 0.4s ease, opacity 0.3s ease;
            opacity: 0;
        }

        /* Active / hover state */
        .spine-card:hover .spine-card-bar,
        .spine-card.active .spine-card-bar { opacity: 1; width: 4px; }
        .spine-card:hover .spine-card-body,
        .spine-card.active .spine-card-body {
            background: var(--body-color-soft);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }
        .spine-card:hover .spine-card-desc,
        .spine-card.active .spine-card-desc {
            max-height: 60px; opacity: 1;
        }

        /* Dim non-active cards */
        .spine-layout.has-active .spine-card { opacity: 0.35; }
        .spine-layout.has-active .spine-card.active { opacity: 1; }

        /* Core card — y center */
        .spine-card-core {
            background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, rgba(74,158,255,0.06) 100%);
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255,255,255,0.1);
        }
        [data-theme="dark"] .spine-card-core,
        .spine-card-core {
            border-color: rgba(255,255,255,0.08);
        }
        .spine-card-core .spine-card-counter {
            font-family: var(--font-mono); font-size: 1.4rem;
            letter-spacing: 0.08em;
            background: linear-gradient(135deg, #fff 0%, var(--accent-soft) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .spine-card-core .spine-card-bar {
            opacity: 1;
            background: linear-gradient(to bottom, #fff, var(--accent-color)) !important;
        }
        .spine-card-core .spine-card-title {
            color: var(--accent-soft);
        }
        .spine-card-core .spine-card-desc {
            max-height: 0; opacity: 0;
        }
        .spine-card-core:hover .spine-card-desc,
        .spine-card-core.active .spine-card-desc {
            max-height: 60px; opacity: 1;
        }

        /* When core is hovered, pulse the shield ring brighter */
        .spine-layout.has-active .sr-shield { opacity: 1; stroke-width: 3; }
        .spine-layout.has-active .sr-shield-pulse { animation: sr-shield-active 1.5s ease-in-out infinite; }
        @keyframes sr-shield-active { 0%,100% { opacity: 0.05; } 50% { opacity: 0.25; } }

        @media (max-width: 900px) {
            .spine-layout { grid-template-columns: 1fr; }
            .spine-rings { width: 280px; height: 280px; margin: 0 auto; }
        }
        @media (max-width: 600px) {
            .spine-rings { width: 220px; height: 220px; }
        }

        /* ─── Section Headers ─── */
        .section-header { max-width: 700px; margin: 0 auto var(--space-2xl); }
        .section-label {
            font-family: var(--font-mono); font-size: var(--caption);
            text-transform: uppercase; letter-spacing: 0.12em;
            color: var(--accent-color); margin-bottom: var(--space-sm);
            font-weight: 500;
        }
        .section-header h2 { margin-bottom: var(--space-md); }
        .section-header p { font-size: var(--body-lg); }

        /* Center variant */
        .section-header.centered { text-align: center; }

        /* ─── Problem ─── */
        .problem {
            background: var(--body-color-deep);
            position: relative;
            overflow: hidden;
        }
        .problem::before {
            content: '';
            position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(224, 62, 62, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }
        .problem-grid {
            position: relative;
            width: 100%;
            overflow: hidden;
        }
        .problem-carousel-track {
            display: flex;
            transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
            will-change: transform;
        }
        /* cards are nested inside .problem-carousel-slide */
        .problem-carousel-slide {
            flex: 0 0 100%;
            display: flex;
            justify-content: center;
            padding: 0 var(--space-md);
            box-sizing: border-box;
        }
        .problem-carousel-slide > .problem-card {
            width: 100%;
            max-width: 680px;
        }
        .problem-carousel-nav {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: var(--space-sm);
            margin-top: var(--space-lg);
        }
        .problem-dot {
            width: 8px; height: 8px;
            border-radius: 50%;
            background: var(--text-color-muted);
            opacity: 0.25;
            border: none;
            cursor: pointer;
            padding: 0;
            transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
        }
        .problem-dot.active {
            opacity: 1;
            background: var(--red);
            width: 28px;
            border-radius: 4px;
        }
        .problem-carousel-arrow {
            width: 36px; height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            background: transparent;
            color: var(--text-color-secondary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: all 0.3s ease;
            flex-shrink: 0;
        }
        .problem-carousel-arrow:hover {
            border-color: var(--red);
            color: var(--red);
            background: rgba(255,82,82,0.06);
        }
        .problem-card {
            padding: var(--space-xl) var(--space-lg);
            background: var(--body-color);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 200px;
            gap: var(--space-lg);
            align-items: center;
        }
        .problem-card:hover { box-shadow: var(--shadow-md); }
        .problem-card-text {}
        .problem-stat {
            font-size: clamp(2.5rem, 5vw, 3.5rem); font-weight: 800;
            background: linear-gradient(135deg, var(--red), #ff6b6b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.3rem;
            letter-spacing: -0.03em;
            line-height: 1;
        }
        .problem-label {
            font-size: var(--body-sm); color: var(--text-color-secondary);
            margin-bottom: 0; line-height: 1.55;
        }
        .problem-source {
            font-family: var(--font-mono); font-size: 0.65rem;
            color: var(--text-color-muted); margin-top: 0.75rem;
            text-transform: uppercase; letter-spacing: 0.05em;
        }
        /* Problem card inline viz */
        .problem-viz {
            width: 100%; height: 120px;
            flex-shrink: 0;
        }
        .problem-viz svg { width: 100%; height: 100%; }

        /* Animated bar rise */
        .pviz-bar {
            transition: height 1s cubic-bezier(0.16, 1, 0.3, 1), y 1s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .problem-card:not(.animated) .pviz-bar {
            height: 0 !important;
        }
        /* Animated fill width */
        .pviz-fill {
            transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .problem-card:not(.animated) .pviz-fill {
            width: 0 !important;
        }
        /* People dots */
        .pviz-dot {
            transition: opacity 0.4s ease, transform 0.4s ease;
        }
        .problem-card:not(.animated) .pviz-dot {
            opacity: 0.15 !important; transform: scale(0.8);
        }

        @media (max-width: 768px) {
            .problem-card { grid-template-columns: 1fr; }
            .problem-viz { width: 100%; height: 60px; }
        }

        /* ─── Superpowers ─── */
        .superpowers { background: var(--body-color); }
        .superpower-grid {
            display: flex; flex-direction: column; gap: var(--space-sm);
        }
        .superpower {
            padding: var(--space-md) var(--space-lg);
            background: var(--body-color-soft);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }
        .superpower::after {
            content: '';
            position: absolute; top: 0; left: 0;
            width: 100%; height: 3px;
            background: linear-gradient(90deg, var(--accent-color), var(--accent-soft));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .superpower:hover {
            border-color: rgba(74, 158, 255, 0.15);
            box-shadow: var(--shadow-md);
        }
        .superpower:hover::after { opacity: 1; }
        .superpower.expanded {
            padding: var(--space-lg);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            border-color: rgba(74, 158, 255, 0.2);
        }
        .superpower.expanded::after { opacity: 1; }

        /* Compressed header — always visible */
        .superpower-header {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .superpower-icon {
            width: 36px; height: 36px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 8px;
            background: var(--accent-light);
            color: var(--accent-color);
            font-size: 1.1rem;
            flex-shrink: 0;
            transition: all 0.4s ease;
        }
        .superpower.expanded .superpower-icon {
            background: var(--accent-color);
            color: #fff;
        }
        .superpower-header-text {
            flex: 1; min-width: 0;
        }
        .superpower-num {
            font-family: var(--font-mono); font-size: 0.65rem;
            color: var(--accent-color); text-transform: uppercase; letter-spacing: 0.1em;
            font-weight: 600; margin-bottom: 0.1rem;
        }
        .superpower h3 {
            font-size: var(--headline-sm); margin-bottom: 0;
            transition: margin 0.4s ease;
        }
        .superpower.expanded h3 { margin-bottom: var(--space-sm); }
        .superpower-expand-icon {
            width: 24px; height: 24px;
            display: flex; align-items: center; justify-content: center;
            color: var(--text-color-muted);
            font-size: 1.2rem;
            transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            flex-shrink: 0;
        }
        .superpower.expanded .superpower-expand-icon {
            transform: rotate(45deg);
        }

        /* Expandable body — hidden by default */
        .superpower-body {
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                        opacity 0.4s ease, margin-top 0.4s ease;
            opacity: 0;
            margin-top: 0;
        }
        .superpower.expanded .superpower-body {
            grid-template-rows: 1fr;
            opacity: 1;
            margin-top: var(--space-sm);
        }
        .superpower-body-inner {
            overflow: hidden;
        }

        .superpower p { font-size: var(--body-sm); margin-bottom: var(--space-sm); line-height: 1.6; }
        .superpower-example {
            font-family: var(--font-mono); font-size: 0.8rem;
            color: var(--text-color-secondary); padding: 1rem;
            background: var(--body-color);
            border-radius: var(--radius-sm);
            margin-top: var(--space-sm);
            line-height: 1.6;
            border-left: 3px solid var(--accent-color);
        }
        .superpower-metrics {
            display: flex; gap: 0.4rem; margin-top: var(--space-sm);
            flex-wrap: wrap;
        }
        .sp-metric {
            font-family: var(--font-mono); font-size: 0.7rem;
            padding: 0.25rem 0.5rem;
            background: var(--accent-light);
            border-radius: 4px;
            color: var(--accent-color);
            font-weight: 500;
        }

        /* ─── Chat (in hero) ─── */
        .hero-chat {
            position: relative;
        }
        .chat-window {
            width: 100%;
            background: var(--body-color);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            position: relative;
        }
        .chat-titlebar {
            display: flex; align-items: center; gap: 0.75rem;
            padding: 0.875rem 1.25rem;
            border-bottom: 1px solid var(--border-color);
            background: var(--body-color-soft);
        }
        .chat-avatar {
            width: 30px; height: 30px; border-radius: 8px;
            background: linear-gradient(135deg, var(--accent-color), var(--accent-soft));
            display: flex; align-items: center; justify-content: center;
            color: white; font-weight: 700; font-size: 0.75rem;
            font-family: var(--font-mono);
        }
        .chat-title-text { font-weight: 600; font-size: var(--body-sm); }
        .chat-status { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-color-muted); }
        .chat-messages {
            padding: 0.75rem; min-height: 320px; max-height: 380px;
            display: flex; flex-direction: column; gap: 0.65rem;
            overflow-y: auto;
        }
        .chat-msg {
            max-width: 88%; padding: 0.65rem 0.85rem;
            font-size: 0.8rem; line-height: 1.55;
            opacity: 0; transform: translateY(8px);
            transition: opacity 0.4s ease, transform 0.4s ease;
        }
        .chat-msg.visible { opacity: 1; transform: translateY(0); }
        .chat-msg.user {
            align-self: flex-end;
            background: var(--chat-user-bg);
            color: var(--text-color);
            border-radius: var(--radius-sm) var(--radius-sm) 4px var(--radius-sm);
            font-weight: 500;
        }
        .chat-msg.ai {
            align-self: flex-start;
            background: var(--chat-ai-bg);
            border: 1px solid var(--border-color);
            color: var(--text-color-secondary);
            border-radius: var(--radius-sm) var(--radius-sm) var(--radius-sm) 4px;
        }
        .chat-msg.ai strong { color: var(--text-color); }
        .chat-msg svg { max-width: 180px; }
        .chat-msg svg text { fill: var(--text-color-muted); }
        .chat-msg .m { color: var(--accent-color); font-weight: 600; font-family: var(--font-mono); font-size: 0.8rem; }
        .chat-msg .up { color: var(--green); font-weight: 700; font-family: var(--font-mono); font-size: 0.8rem; }
        .chat-msg .down { color: var(--red); font-weight: 700; font-family: var(--font-mono); font-size: 0.8rem; }
        .chat-msg .warn { color: var(--amber); font-weight: 700; font-family: var(--font-mono); font-size: 0.8rem; }
        .chat-typing {
            align-self: flex-start; padding: 0.875rem 1rem;
            background: var(--chat-ai-bg); border: 1px solid var(--border-color);
            border-radius: var(--radius-sm) var(--radius-sm) var(--radius-sm) 4px;
            display: flex; gap: 5px; align-items: center;
            opacity: 0; transition: opacity 0.3s ease;
        }
        .chat-typing.visible { opacity: 1; }
        .chat-typing span {
            width: 6px; height: 6px; border-radius: 50%;
            background: var(--text-color-muted); animation: typingDot 1.4s infinite;
        }
        .chat-typing span:nth-child(2) { animation-delay: 0.2s; }
        .chat-typing span:nth-child(3) { animation-delay: 0.4s; }
        @keyframes typingDot {
            0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
            30% { opacity: 1; transform: translateY(-3px); }
        }
        .chat-tabs {
            display: flex; gap: 0; border-top: 1px solid var(--border-color);
            background: var(--body-color-soft);
        }
        .chat-tab {
            flex: 1; padding: 0.75rem; text-align: center;
            font-family: var(--font-mono); font-size: 0.7rem;
            text-transform: uppercase; letter-spacing: 0.06em;
            color: var(--text-color-muted); cursor: pointer;
            border: none; background: transparent;
            border-right: 1px solid var(--border-color);
            transition: all var(--transition);
            font-weight: 500;
            position: relative;
        }
        .chat-tab:last-child { border-right: none; }
        .chat-tab:hover { color: var(--text-color); }
        .chat-tab.active {
            color: var(--accent-color); background: var(--accent-light);
        }
        .chat-tab.active::after {
            content: '';
            position: absolute; bottom: 0; left: 0; right: 0;
            height: 2px;
            background: var(--accent-color);
        }

        /* ─── Scenarios ─── */
        .scenarios {
            background: var(--body-color-soft);
            position: relative;
        }
        .scenario-grid {
            display: flex; flex-direction: column; gap: var(--space-sm);
        }
        .scenario-card {
            padding: var(--space-md) var(--space-lg);
            background: var(--body-color);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }
        .scenario-card::before {
            content: '';
            position: absolute; top: 0; left: 0; right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-color), transparent);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(74,158,255,0.15);
        }
        .scenario-card:hover::before { opacity: 1; }
        .scenario-card.expanded {
            padding: var(--space-lg);
            box-shadow: var(--shadow-lg);
            border-color: rgba(74,158,255,0.2);
        }
        .scenario-card.expanded::before { opacity: 1; }

        /* Compressed header */
        .scenario-header {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .scenario-icon {
            width: 32px; height: 32px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 6px;
            background: var(--accent-light);
            color: var(--accent-color);
            font-size: 1rem;
            flex-shrink: 0;
            transition: all 0.4s ease;
        }
        .scenario-card.expanded .scenario-icon {
            background: var(--accent-color);
            color: #fff;
        }
        .scenario-header-text { flex: 1; min-width: 0; }
        .scenario-vertical {
            font-family: var(--font-mono); font-size: 0.65rem;
            text-transform: uppercase; letter-spacing: 0.1em;
            color: var(--accent-color); margin-bottom: 0.1rem;
            font-weight: 600;
        }
        .scenario-card h4 { margin-bottom: 0; font-size: 1.1rem; transition: margin 0.4s ease; }
        .scenario-card.expanded h4 { margin-bottom: var(--space-sm); }
        .scenario-expand-icon {
            width: 20px; height: 20px;
            display: flex; align-items: center; justify-content: center;
            color: var(--text-color-muted);
            font-size: 1.1rem;
            transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            flex-shrink: 0;
        }
        .scenario-card.expanded .scenario-expand-icon {
            transform: rotate(45deg);
        }

        /* Expandable body */
        .scenario-body {
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                        opacity 0.4s ease, margin-top 0.4s ease;
            opacity: 0;
            margin-top: 0;
        }
        .scenario-card.expanded .scenario-body {
            grid-template-rows: 1fr;
            opacity: 1;
            margin-top: var(--space-sm);
        }
        .scenario-body-inner {
            overflow: hidden;
        }

        .scenario-card p { font-size: var(--body-sm); margin-bottom: var(--space-sm); line-height: 1.6; }
        .scenario-insight {
            font-size: 0.78rem; line-height: 1.5;
            padding: 0.75rem;
            border-radius: var(--radius-sm);
            background: var(--accent-light);
            color: var(--text-color-muted);
            font-family: var(--font-mono);
        }
        .scenario-insight strong { color: var(--accent-color); font-weight: 600; }

        /* ─── CTA ─── */
        .cta {
            position: relative;
            text-align: center;
            padding: var(--space-3xl) 0;
            background: linear-gradient(135deg, #1a3a5c 0%, #0e2240 50%, #0b1a33 100%);
            color: white;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute; inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(74, 158, 255, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta .container { position: relative; z-index: 1; }
        .cta h2 { color: white; margin-bottom: var(--space-md); }
        .cta p { color: rgba(255,255,255,0.7); }
        .cta .btn-primary {
            background: white; color: #0e2240;
            box-shadow: 0 2px 16px rgba(255,255,255,0.2);
        }
        .cta .btn-primary:hover {
            background: var(--accent-soft); color: white;
        }
        .cta .btn-secondary {
            background: transparent; color: white;
            border: 1px solid rgba(255,255,255,0.25);
        }
        .cta .btn-secondary:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.5);
        }

        /* ─── Footer ─── */
        .footer { padding: var(--space-lg) 0; border-top: 1px solid var(--border-color); }
        .footer-content { display: flex; justify-content: space-between; align-items: center; }
        .footer-text { color: var(--text-color-muted); font-size: var(--body-sm); }
        .footer-links { display: flex; gap: var(--space-lg); list-style: none; }
        .footer-link {
            color: var(--text-color-muted); text-decoration: none;
            font-size: var(--body-sm);
            transition: color var(--transition);
        }
        .footer-link:hover { color: var(--accent-color); }

        /* (gauge-ring styles removed — replaced by contextual problem vizzes) */

        /* ─── Mini Charts (Superpowers) ─── */
        .sp-chart {
            margin-top: var(--space-sm);
            padding: 0.75rem;
            background: var(--body-color);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }
        .sp-chart-label {
            font-family: var(--font-mono); font-size: 0.65rem;
            color: var(--text-color-muted); text-transform: uppercase;
            letter-spacing: 0.06em; margin-bottom: 0.5rem; font-weight: 500;
        }

        /* Horizontal bar chart */
        .bar-chart { display: flex; flex-direction: column; gap: 0.4rem; }
        .bar-row {
            display: flex; align-items: center; gap: 0.5rem;
        }
        .bar-label {
            font-family: var(--font-mono); font-size: 0.65rem;
            color: var(--text-color-muted); min-width: 70px; text-align: right;
        }
        .bar-track {
            flex: 1; height: 20px; background: var(--body-color-soft);
            border-radius: 4px; overflow: hidden; position: relative;
        }
        .bar-fill {
            height: 100%; border-radius: 4px;
            width: 0; transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
            display: flex; align-items: center; justify-content: flex-end;
            padding-right: 6px;
            font-family: var(--font-mono); font-size: 0.6rem; font-weight: 600; color: white;
        }
        .bar-fill.animated { /* width set by style attr */ }
        .bar-fill.blue { background: var(--accent-color); }
        .bar-fill.red { background: var(--red); }
        .bar-fill.green { background: var(--green); }
        .bar-fill.amber { background: var(--amber); }

        /* Semicircle gauge */
        .semi-gauge { text-align: center; }
        .semi-gauge svg { display: block; margin: 0 auto; }
        .semi-gauge .gauge-value {
            font-family: var(--font-mono); font-size: 1.1rem; font-weight: 700;
            color: var(--text-color); margin-top: -0.5rem;
        }
        .semi-gauge .gauge-max {
            font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-color-muted);
        }

        /* Heatmap grid */
        .heatmap-grid {
            display: grid; grid-template-columns: repeat(5, 1fr); gap: 3px;
        }
        .heatmap-cell {
            aspect-ratio: 1; border-radius: 3px;
            background: var(--accent-color);
            transition: opacity 0.6s ease;
        }

        /* Sparkline */
        .sparkline-chart { position: relative; }
        .sparkline-chart svg { width: 100%; height: 48px; }
        .sparkline-chart polyline {
            fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
        }
        .sparkline-chart .sparkline-area {
            stroke: none;
        }
        .sparkline-legend {
            display: flex; gap: 0.75rem; margin-top: 0.35rem;
        }
        .sparkline-legend span {
            font-family: var(--font-mono); font-size: 0.6rem;
            color: var(--text-color-muted);
            display: flex; align-items: center; gap: 0.3rem;
        }
        .sparkline-legend .dot {
            width: 6px; height: 6px; border-radius: 50%; display: inline-block;
        }

        /* 5-store bars */
        .store-bars { display: flex; gap: 4px; align-items: flex-end; height: 48px; }
        .store-bar {
            flex: 1; border-radius: 3px 3px 0 0;
            transition: height 0.8s cubic-bezier(0.16, 1, 0.3, 1);
            position: relative;
        }
        .store-bar .store-name {
            position: absolute; bottom: -16px; left: 50%; transform: translateX(-50%);
            font-family: var(--font-mono); font-size: 0.5rem;
            color: var(--text-color-muted); white-space: nowrap;
        }

        /* Tolerance bars */
        .tolerance-bars { display: flex; flex-direction: column; gap: 0.35rem; }
        .tolerance-row {
            display: flex; align-items: center; gap: 0.5rem;
        }
        .tolerance-label {
            font-family: var(--font-mono); font-size: 0.65rem;
            color: var(--text-color-muted); min-width: 65px; text-align: right;
        }
        .tolerance-track {
            flex: 1; height: 14px; background: var(--body-color-soft);
            border-radius: 3px; overflow: hidden;
        }
        .tolerance-fill {
            height: 100%; border-radius: 3px;
            width: 0;
            transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .tolerance-val {
            font-family: var(--font-mono); font-size: 0.65rem;
            color: var(--text-color); font-weight: 600; min-width: 30px;
        }

        /* Scenario sparklines */
        .scenario-sparkline {
            margin-top: 0.5rem;
        }
        .scenario-sparkline svg {
            width: 100%; height: 32px;
        }

        /* Animated counter */
        .counter-value {
            font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700;
            color: var(--accent-color);
            display: block; margin-bottom: 0.25rem;
        }

        /* ─── Responsive ─── */
        @media (max-width: 1024px) {
            /* hero is now single-column centered */
            /* superpower-grid is now flex column */
            /* scenario-grid is now flex column */
            /* problem carousel — no grid override needed */
            .spine-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            /* superpower-grid is flex column */
            /* scenario-grid is flex column */
            /* problem carousel — single column by nature */
            .spine-grid { grid-template-columns: 1fr; }
            .nav-menu { display: none; }
            .hero-actions { flex-direction: column; }
            .btn { width: 100%; text-align: center; }
            .footer-content { flex-direction: column; gap: var(--space-md); text-align: center; }
        }