/* ── Reset & Base ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #0a0a0c;
    --bg-elevated: #111114;
    --bg-card: #16161a;
    --bg-card-hover: #1c1c22;
    --text: #e8e6e3;
    --text-muted: #8a8a8e;
    --text-dim: #5a5a5e;
    --accent: #7c6cf0;
    --accent-glow: rgba(124, 108, 240, 0.15);
    --accent-bright: #a89afb;
    --accent-warm: #f0a06c;
    --green: #4ade80;
    --green-dim: rgba(74, 222, 128, 0.15);
    --red: #f87171;
    --red-dim: rgba(248, 113, 113, 0.15);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --radius: 12px;
    --radius-lg: 20px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'JetBrains Mono', 'SF Mono', monospace;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1120px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ── Nav ── */
#nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 2rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(10, 10, 12, 0.7);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.logo-mark {
    font-size: 1.25rem;
    color: var(--accent);
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color var(--transition);
    letter-spacing: 0.02em;
}

.nav-links a:hover {
    color: var(--text);
}

.nav-cta {
    padding: 8px 20px !important;
    background: var(--accent);
    color: white !important;
    border-radius: 8px;
    font-weight: 500;
    transition: all var(--transition) !important;
}

.nav-cta:hover {
    background: var(--accent-bright) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* ── Hero ── */
#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

#hero-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.35;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 18px;
    border: 1px solid var(--border-hover);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: var(--accent-bright);
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    background: rgba(124, 108, 240, 0.05);
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.hero-accent {
    background: linear-gradient(135deg, var(--accent), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 3rem;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 4rem;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-value {
    font-family: var(--mono);
    font-size: 2rem;
    font-weight: 500;
    color: var(--accent-bright);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

.hero-scroll {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-dim);
    transition: color var(--transition);
    animation: float 3s ease-in-out infinite;
}

.hero-scroll:hover {
    color: var(--text);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* ── Sections ── */
section {
    padding: 8rem 2rem;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-label {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-intro {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 3rem;
    line-height: 1.7;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

/* ── Core: Error Correction ── */
#core {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.core-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-top: 2rem;
}

.core-lead {
    font-size: 1.1rem;
    line-height: 1.75;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.core-body {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.core-body em {
    color: var(--text);
}

/* Noise comparison visual */
.noise-demo {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.noise-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.noise-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.noise-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 100px;
    overflow: hidden;
}

.noise-fill {
    height: 100%;
    border-radius: 100px;
    animation: fill-bar 2s ease-out forwards;
    transform-origin: left;
}

.noise-bad {
    width: 85%;
    background: linear-gradient(90deg, var(--red), rgba(248, 113, 113, 0.5));
    animation-delay: 0.5s;
}

.noise-good {
    width: 12%;
    background: linear-gradient(90deg, var(--green), rgba(74, 222, 128, 0.5));
    animation-delay: 0.8s;
}

@keyframes fill-bar {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
}

.noise-val {
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.noise-val.bad { color: var(--red); }
.noise-val.good { color: var(--green); }

/* ── Path / Roadmap Timeline ── */
#path {
    padding-bottom: 6rem;
}

.path-timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.path-item {
    display: flex;
    gap: 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.path-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.path-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 2rem;
    min-width: 24px;
}

.path-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--text-dim);
    position: relative;
    z-index: 1;
    transition: all var(--transition);
}

.path-dot.active {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 16px var(--accent-glow);
}

.path-line-v {
    width: 2px;
    flex: 1;
    background: linear-gradient(to bottom, var(--border-hover), var(--border));
    min-height: 20px;
}

.path-card {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem 2.5rem;
    margin-bottom: 1rem;
    transition: all var(--transition);
}

.path-card:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.path-card.now {
    border-color: rgba(124, 108, 240, 0.25);
    background: linear-gradient(135deg, var(--bg-card), rgba(124, 108, 240, 0.03));
}

.path-when {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.path-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.path-card p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.path-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.7rem;
    font-family: var(--mono);
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    color: var(--text-dim);
    letter-spacing: 0.03em;
}

/* ── Proven ── */
#proven {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.proven-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.proven-row-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-dim);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    margin-top: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.proven-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.proven-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.proven-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.proven-metric {
    font-family: var(--mono);
    font-size: 2rem;
    font-weight: 500;
    color: var(--accent-bright);
    margin-bottom: 2px;
    line-height: 1.2;
}

.proven-detail {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.proven-card p {
    font-size: 0.825rem;
    line-height: 1.6;
    color: var(--text-muted);
}

/* ── Quote ── */
#quote {
    text-align: center;
    padding: 6rem 2rem;
}

blockquote p {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 300;
    line-height: 1.6;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
    letter-spacing: -0.01em;
}

blockquote em {
    color: var(--accent-bright);
    font-style: italic;
}

/* ── Contact ── */
#contact {
    text-align: center;
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
}

.contact-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 500px;
    margin: 0.5rem auto 2.5rem;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: var(--accent);
    color: white;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--mono);
    letter-spacing: 0.02em;
    transition: all var(--transition);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.contact-btn:hover {
    background: var(--accent-bright);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(124, 108, 240, 0.3);
}

/* ── Footer ── */
#footer {
    padding: 2rem;
    border-top: 1px solid var(--border);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.footer-meta {
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* ── Responsive ── */
@media (max-width: 900px) {
    .proven-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .core-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .proven-grid {
        grid-template-columns: 1fr;
    }
    .hero-stats {
        gap: 1rem;
    }
    .stat-value {
        font-size: 1.5rem;
    }
    .nav-links a:not(.nav-cta) {
        display: none;
    }
    section {
        padding: 5rem 1.25rem;
    }
    .path-item {
        gap: 1rem;
    }
    .path-card {
        padding: 1.5rem;
    }
}