/* ══════════════════════════════════════════
   TATVAM AI LABS — COMPLETE REDESIGN
   Theme: Premium Dark · Sacred Gold · AI Neural
   ══════════════════════════════════════════ */

/* ─── DESIGN TOKENS ─── */
:root {
    --bg:           #060810;
    --bg-2:         #0A0D15;
    --bg-3:         #0E1120;
    --surface:      rgba(255,255,255,0.03);
    --surface-2:    rgba(255,255,255,0.06);
    --border:       rgba(255,255,255,0.06);
    --border-gold:  rgba(201,168,76,0.25);

    --gold:         #C9A84C;
    --gold-light:   #E8CFA0;
    --gold-dim:     rgba(201,168,76,0.12);
    --gold-glow:    rgba(201,168,76,0.08);

    --text:         #E8E8EE;
    --text-2:       #9A9AB0;
    --text-3:       #6A6A80;
    --white:        #FFFFFF;

    --accent-blue:  #4A7CF6;
    --accent-teal:  #2ECAC8;

    --font-sans:    'Inter', -apple-system, sans-serif;
    --font-serif:   'Cormorant Garamond', Georgia, serif;

    --radius-sm:    8px;
    --radius:       14px;
    --radius-lg:    22px;

    --shadow-gold:  0 0 40px rgba(201,168,76,0.08);
    --shadow-card:  0 4px 32px rgba(0,0,0,0.4);

    --ease:         cubic-bezier(0.16, 1, 0.3, 1);
    --dur:          0.7s;
}

/* ─── RESET ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    line-height: 1.65;
    overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

/* ─── CANVAS: Particle background ─── */
#hero-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.35;
}

/* ─── LAYOUT ─── */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}
.section { padding: 110px 0; position: relative; z-index: 2; }
.dark-section { background: var(--bg-2); }
.center-text { text-align: center; }
.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }

/* ─── SCROLL REVEAL ─── */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ─── TYPOGRAPHY ─── */
.gradient-text {
    background: linear-gradient(100deg, var(--gold-light) 0%, var(--gold) 40%, #A07830 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: shimmer 5s linear infinite;
}
@keyframes shimmer { to { background-position: 200% center; } }

.eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 20px;
}

/* ─── HUD RINGS ─── */
.hud-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(201,168,76,0.12);
    pointer-events: none;
    z-index: 1;
    animation: ringPulse 6s ease-in-out infinite;
}
.r1 { width: 520px; height: 520px; top: 50%; left: 65%; transform: translate(-50%,-50%); animation-delay: 0s; }
.r2 { width: 780px; height: 780px; top: 50%; left: 65%; transform: translate(-50%,-50%); animation-delay: 1s; border-color: rgba(201,168,76,0.06); }
.r3 { width: 1040px; height: 1040px; top: 50%; left: 65%; transform: translate(-50%,-50%); animation-delay: 2s; border-color: rgba(201,168,76,0.03); }
@keyframes ringPulse {
    0%, 100% { opacity: 0.6; transform: translate(-50%,-50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%,-50%) scale(1.02); }
}

/* ─── SCAN LINE ─── */
.scan-line {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(201,168,76,0.4), transparent);
    z-index: 3;
    animation: scanDown 8s linear infinite;
    pointer-events: none;
}
@keyframes scanDown {
    0% { top: 0; opacity: 1; }
    90% { opacity: 0.5; }
    100% { top: 100%; opacity: 0; }
}

/* ─── FLOATING DATA TAGS ─── */
.data-tag {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 7px;
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    color: rgba(201,168,76,0.55);
    border: 1px solid rgba(201,168,76,0.15);
    background: rgba(201,168,76,0.04);
    padding: 5px 11px;
    border-radius: 4px;
    pointer-events: none;
    z-index: 1;
    white-space: nowrap;
    animation: tagFloat 7s ease-in-out infinite;
}
.data-tag em { color: var(--gold); font-style: normal; }
.dt-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--gold);
    animation: dotBlink 2s ease-in-out infinite;
    flex-shrink: 0;
}
.dt1 { top: 18%; right: 5%; animation-delay: 0s; }
.dt2 { top: 34%; right: 3%; animation-delay: 1.2s; }
.dt3 { bottom: 30%; right: 6%; animation-delay: 2.4s; }
.dt4 { bottom: 18%; right: 4%; animation-delay: 3.6s; }
@keyframes tagFloat {
    0%, 100% { transform: translateY(0); opacity: 0.6; }
    50% { transform: translateY(-8px); opacity: 1; }
}
@keyframes dotBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

/* ─── SYSTEM BADGE ─── */
.sys-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: 'Courier New', monospace;
    font-size: 0.68rem;
    color: var(--gold);
    border: 1px solid rgba(201,168,76,0.25);
    background: rgba(201,168,76,0.05);
    padding: 6px 14px;
    border-radius: 4px;
    letter-spacing: 0.06em;
    margin-bottom: 28px;
}
.sys-ping {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 8px #4ade80;
    animation: sysPing 2s ease-in-out infinite;
    flex-shrink: 0;
}
@keyframes sysPing {
    0%, 100% { opacity: 1; box-shadow: 0 0 8px #4ade80; }
    50% { opacity: 0.4; box-shadow: 0 0 2px #4ade80; }
}

/* ─── HERO TITLE (Typewriter) ─── */
.hero-title {
    margin-bottom: 24px;
}
.ht-static {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(2.6rem, 6vw, 5rem);
    font-weight: 300;
    line-height: 1.1;
    color: var(--white);
    margin-bottom: 4px;
}
.ht-dynamic {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(2.6rem, 6vw, 5rem);
    font-weight: 300;
    line-height: 1.1;
    min-height: 1.2em;
    background: linear-gradient(100deg, var(--gold-light), var(--gold));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.tw-cursor {
    display: inline-block;
    color: var(--gold);
    font-weight: 300;
    animation: cursorBlink 0.8s step-end infinite;
    font-style: normal;
    margin-left: 2px;
}
@keyframes cursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ─── TERMINAL LINE ─── */
.terminal-line {
    display: flex;
    align-items: center;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: rgba(201,168,76,0.5);
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(201,168,76,0.1);
    border-radius: 4px;
    padding: 8px 14px;
    margin-bottom: 28px;
    max-width: 600px;
    overflow: hidden;
}
.tl-prompt { color: #4ade80; flex-shrink: 0; }
.tl-cmd { color: rgba(201,168,76,0.8); }

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--gold);
    border: 1px solid var(--border-gold);
    background: var(--gold-dim);
    padding: 5px 14px;
    border-radius: 99px;
    margin-bottom: 22px;
}
.chip-light { color: var(--gold-light); border-color: rgba(232,207,160,0.3); background: rgba(232,207,160,0.05); }

.section-header { margin-bottom: 60px; }
.section-header.center-text { display: flex; flex-direction: column; align-items: center; }

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--white);
    margin-bottom: 18px;
}
.section-sub {
    font-size: 1.05rem;
    color: var(--text-2);
    max-width: 580px;
    line-height: 1.8;
}
.section-header.center-text .section-sub { text-align: center; }

/* ─── NAVBAR ─── */
.navbar {
    position: fixed;
    top: 0; width: 100%;
    z-index: 100;
    transition: background 0.4s ease, border-color 0.4s ease;
    border-bottom: 1px solid transparent;
}
.navbar.scrolled {
    background: rgba(6, 8, 16, 0.85);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: var(--border);
}
.nav-inner {
    max-width: 1140px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-mark { width: 32px; height: 32px; flex-shrink: 0; }
.logo-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--white);
    letter-spacing: 0.02em;
}
.logo-accent { color: var(--gold); }


.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-link {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-2);
    letter-spacing: 0.02em;
    transition: color 0.2s;
}
.nav-link:hover { color: var(--white); }
.nav-cta {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gold);
    border: 1px solid var(--border-gold);
    padding: 8px 20px;
    border-radius: 8px;
    background: var(--gold-dim);
    transition: background 0.2s, color 0.2s;
    letter-spacing: 0.02em;
}
.nav-cta:hover { background: var(--gold); color: var(--bg); }
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.hamburger span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* Mobile Nav */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(6, 8, 16, 0.97);
    z-index: 99;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    transform: translateY(-100%);
    transition: transform 0.4s var(--ease);
}
.mobile-nav.open { display: flex; transform: translateY(0); }
.mobile-link {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--white);
    font-weight: 300;
}
.mobile-link:hover { color: var(--gold); }

/* ─── HERO ─── */
.hero {
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: 120px 0 80px;
    z-index: 2;
}
.hero-inner { max-width: 820px; }

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.6rem, 6vw, 5rem);
    font-weight: 300;
    line-height: 1.1;
    color: var(--white);
    margin-bottom: 28px;
}
.hero-title .line { display: block; }
.hero-sub {
    font-size: 1.12rem;
    color: var(--text-2);
    max-width: 560px;
    line-height: 1.85;
    margin-bottom: 40px;
}
.hero-question {
    background: var(--surface);
    border: 1px solid var(--border-gold);
    border-left: 3px solid var(--gold);
    border-radius: 4px 10px 10px 4px;
    padding: 20px 24px;
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--gold-light);
    line-height: 1.7;
    font-style: italic;
    margin-bottom: 40px;
    max-width: 600px;
    position: relative;
}
.quote-mark { font-size: 2rem; color: var(--gold); line-height: 0; vertical-align: middle; }

/* Launch Strip */
.launch-strip {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}
.ls-badge {
    font-size: 0.82rem;
    font-weight: 600;
    background: rgba(201,168,76,0.1);
    border: 1px solid var(--border-gold);
    color: var(--gold);
    padding: 6px 14px;
    border-radius: 99px;
}
.ls-divider { width: 1px; height: 16px; background: var(--border); flex-shrink: 0; }
.ls-date { font-size: 0.88rem; font-weight: 600; color: var(--white); }
.ls-sub { font-size: 0.82rem; color: var(--text-3); font-style: italic; }

/* Countdown */
.countdown {
    display: flex;
    align-items: center;
    gap: 12px;
}
.cd-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-sm);
    min-width: 72px;
    padding: 12px 10px 10px;
    box-shadow: var(--shadow-gold);
}
.cd-num {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--gold-light);
    line-height: 1;
    margin-bottom: 4px;
}
.cd-label {
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
}
.cd-sep {
    font-size: 1.6rem;
    color: var(--gold);
    opacity: 0.5;
    margin-bottom: 18px;
    font-family: var(--font-serif);
}

/* Scroll hint */
.hero-scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 2;
}
.scroll-line {
    display: block;
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, transparent, var(--gold));
    animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); opacity: 0.6; }
    50% { transform: scaleY(0.6); opacity: 1; }
}
.scroll-text { font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-3); }

/* ─── STAT BAR ─── */
.stat-bar {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-2);
    padding: 36px 0;
    position: relative;
    z-index: 2;
}
.stats-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--gold-light);
    line-height: 1;
}
.stat-unit { font-size: 1.2rem; color: var(--gold); margin-left: 2px; }
.stat-label { font-size: 0.78rem; color: var(--text-2); max-width: 160px; }
.stat-divider { width: 1px; height: 48px; background: var(--border); flex-shrink: 0; }

/* ─── WHY NOW ─── */
.why-cols { gap: 56px; }
.text-large { font-size: 1.15rem; line-height: 1.85; margin-bottom: 20px; color: var(--text); }
.highlight-quote {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--white);
    border-left: 2px solid var(--gold);
    padding-left: 16px;
    font-style: italic;
    margin: 24px 0;
    line-height: 1.7;
}
.why-cards { display: flex; flex-direction: column; gap: 16px; }
.why-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    transition: border-color 0.3s, transform 0.3s;
}
.why-card:hover { border-color: var(--border-gold); transform: translateX(4px); }
.why-icon { font-size: 1.4rem; margin-bottom: 8px; }
.why-card h4 { font-size: 0.95rem; font-weight: 600; color: var(--white); margin-bottom: 6px; }
.why-card p { font-size: 0.88rem; color: var(--text-2); line-height: 1.7; }

/* Citation Blocks */
.citation-block {
    background: var(--gold-glow);
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    margin-top: 20px;
}
.citation-text { font-size: 0.92rem; color: var(--gold-light); line-height: 1.7; font-style: italic; margin-bottom: 6px; }
.citation-source { font-size: 0.75rem; color: var(--gold); font-weight: 600; letter-spacing: 0.05em; }

/* ─── ENGINE SECTION ─── */
.layers-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: 0;
    align-items: start;
    margin-bottom: 64px;
}
.layer-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.layer-card:hover { border-color: var(--border-gold); box-shadow: var(--shadow-gold); }
.layer-num { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.15em; color: var(--text-3); margin-bottom: 12px; }
.layer-icon { font-size: 1.8rem; margin-bottom: 12px; }
.layer-title { font-size: 1rem; font-weight: 600; color: var(--white); margin-bottom: 12px; }
.layer-desc { font-size: 0.88rem; color: var(--text-2); line-height: 1.75; margin-bottom: 16px; }
.layer-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.layer-list li { font-size: 0.8rem; color: var(--gold); padding-left: 14px; position: relative; }
.layer-list li::before { content: '→'; position: absolute; left: 0; opacity: 0.7; }
.layer-arrow { font-size: 1.4rem; color: var(--gold); opacity: 0.4; align-self: center; padding: 0 12px; margin-top: -40px; }

/* Diff Banner */
.diff-banner {
    background: linear-gradient(135deg, var(--bg-3), var(--bg-2));
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-lg);
    padding: 48px;
}
.diff-text {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--text-2);
    text-align: center;
    line-height: 1.5;
    margin-bottom: 40px;
}
.diff-text strong { color: var(--white); }
.diff-compare {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}
.compare-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 200px;
}
.compare-label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); margin-bottom: 6px; }
.compare-item { font-size: 0.9rem; color: var(--text-2); }
.compare-col.gold .compare-label { color: var(--gold); }
.compare-col.gold .compare-item { color: var(--gold-light); }
.compare-divider { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.2em; color: var(--text-3); border: 1px solid var(--border); padding: 8px 12px; border-radius: 6px; }

/* ─── BUILD STEPS ─── */
.build-steps { display: flex; flex-direction: column; gap: 0; }
.build-step {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 28px;
    padding-bottom: 48px;
}
.bs-marker { display: flex; flex-direction: column; align-items: center; }
.bs-num {
    width: 40px; height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-gold);
    background: var(--gold-dim);
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--gold-light);
    font-weight: 600;
    flex-shrink: 0;
}
.bs-line { width: 1px; flex: 1; background: linear-gradient(to bottom, var(--border-gold), transparent); margin-top: 12px; min-height: 40px; }
.bs-line-end { display: none; }
.bs-content h3 { font-size: 1.2rem; font-weight: 600; color: var(--white); margin-bottom: 12px; margin-top: 8px; }
.bs-content p { font-size: 0.95rem; color: var(--text-2); line-height: 1.8; margin-bottom: 16px; }

/* ─── PRODUCTS GRID ─── */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.product-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
    transition-delay: var(--d);
}
.product-card:hover { border-color: var(--border-gold); transform: translateY(-6px); box-shadow: var(--shadow-gold); }
.pc-icon { font-size: 2rem; margin-bottom: 14px; }
.product-card h4 { font-size: 1rem; font-weight: 600; color: var(--white); margin-bottom: 10px; }
.product-card p { font-size: 0.86rem; color: var(--text-2); line-height: 1.75; margin-bottom: 16px; }
.pc-tag { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold); border: 1px solid var(--border-gold); padding: 3px 10px; border-radius: 99px; }

/* ─── VISION SECTION ─── */
.vision-section { background: var(--bg); }
.vision-frame {
    background: linear-gradient(135deg, var(--bg-2) 0%, var(--bg-3) 100%);
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-lg);
    padding: 72px;
    text-align: center;
    box-shadow: var(--shadow-gold);
}
.vision-om {
    display: block;
    font-family: var(--font-serif);
    font-size: 4rem;
    color: var(--gold);
    margin-bottom: 24px;
    opacity: 0.7;
    animation: float 4s ease-in-out infinite;
}
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.vision-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    color: var(--white);
    font-weight: 300;
    line-height: 1.25;
    margin-bottom: 16px;
}
.vision-title em { color: var(--gold-light); font-style: normal; }
.vision-sub { font-size: 1.1rem; color: var(--text-2); margin-bottom: 32px; }
.vision-line { width: 60px; height: 1px; background: var(--gold); margin: 0 auto 32px; opacity: 0.5; }
.vision-body { font-size: 1rem; color: var(--text-2); line-height: 1.9; max-width: 640px; margin: 0 auto; }

/* ─── LAUNCH SECTION ─── */
.launch-section {
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(201,168,76,0.05) 0%, transparent 70%), var(--bg-2);
}
.launch-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.launch-title {
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 300;
    line-height: 1.15;
    color: var(--white);
    margin: 16px 0 20px;
}
.launch-desc { font-size: 1.05rem; color: var(--text-2); line-height: 1.85; margin-bottom: 40px; }
.launch-countdown { justify-content: center; margin-bottom: 40px; }
.launch-tagline {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-style: italic;
    color: var(--gold-light);
    opacity: 0.85;
}

/* ─── FOOTER ─── */
.footer {
    padding: 56px 0 0;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 32px;
    flex-wrap: wrap;
    padding-bottom: 40px;
}
.footer-tagline { font-size: 0.88rem; color: var(--text-3); margin-top: 12px; line-height: 1.7; }
.footer-right { text-align: right; }
.footer-email { font-size: 0.95rem; color: var(--gold); transition: color 0.2s; display: block; margin-bottom: 8px; }
.footer-email:hover { color: var(--gold-light); }
.footer-copy { font-size: 0.78rem; color: var(--text-3); }
.footer-citations {
    border-top: 1px solid var(--border);
    padding: 16px 24px;
}
.citation-note { font-size: 0.7rem; color: var(--text-3); line-height: 1.6; }

/* ═══════════ RESPONSIVE ═══════════ */

/* Tablet — 1024px */
@media (max-width: 1024px) {
    .layers-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .layer-arrow { display: none; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    /* Shift rings so they don't bleed right */
    .r1 { left: 80%; }
    .r2 { left: 80%; }
    .r3 { left: 80%; }
    /* Data tags — push inward */
    .dt1, .dt4 { right: 2%; }
    .dt2, .dt3 { right: 1%; }
}

/* Mobile landscape / large phone — 768px */
@media (max-width: 768px) {
    /* Layout */
    .container { padding: 0 20px; }
    .section { padding: 70px 0; }

    /* Hide all decorative hero elements that overflow on mobile */
    .hud-ring,
    .scan-line,
    .data-tag { display: none; }

    /* Navbar */
    .nav-links { display: none; }
    .hamburger { display: flex; }

    /* Hero */
    .hero {
        padding-top: 88px;
        padding-bottom: 60px;
        min-height: auto;
    }
    .hero-inner { max-width: 100%; }

    /* Sys badge — allow wrapping */
    .sys-badge {
        font-size: 0.62rem;
        letter-spacing: 0.04em;
        flex-wrap: wrap;
        gap: 6px;
        white-space: normal;
        line-height: 1.6;
    }
    .sys-text { word-break: break-word; }

    /* Typewriter headline */
    .ht-static,
    .ht-dynamic {
        font-size: clamp(2rem, 7vw, 2.8rem);
    }

    /* Terminal line — scroll horizontally, don't overflow page */
    .terminal-line {
        font-size: 0.72rem;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        max-width: 100%;
    }

    .hero-sub { font-size: 1rem; }
    .hero-question { font-size: 1.05rem; padding: 16px 18px; }

    /* Launch strip stack */
    .launch-strip {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .ls-div { display: none; }
    .ls-sub { font-size: 0.78rem; }

    /* Countdown — side by side, no separators */
    .countdown {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
        width: 100%;
    }
    .cd-sep { display: none; }
    .cd-unit {
        min-width: unset;
        width: 100%;
        padding: 12px 8px;
    }
    .cd-num { font-size: 1.6rem; }
    .cd-label { font-size: 0.6rem; }

    /* Grid collapses */
    .cols-2 { grid-template-columns: 1fr; gap: 36px; }
    .why-cols { gap: 36px; }

    /* Stats */
    .stats-inner {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    .stat-divider { display: none; }
    .stat-num { font-size: 1.8rem; }

    /* Products */
    .products-grid { grid-template-columns: 1fr; }

    /* Why cards — horizontal on tablet */
    .why-cards {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }

    /* Vision */
    .vision-frame { padding: 40px 24px; }
    .vision-title { font-size: clamp(1.5rem, 4.5vw, 2rem); }
    .vision-om { font-size: 3rem; }

    /* Diff banner */
    .diff-banner { padding: 28px 20px; }
    .diff-text { font-size: 1.2rem; }
    .diff-compare { flex-direction: column; text-align: center; gap: 20px; }

    /* Launch */
    .launch-countdown {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
        width: 100%;
        max-width: 340px;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 32px;
    }
    .launch-countdown .cd-sep { display: none; }
    .launch-countdown .cd-unit { width: 100%; min-width: unset; }
    .launch-tagline { font-size: 1.1rem; }

    /* Footer */
    .footer-right { text-align: left; }
    .build-step { grid-template-columns: 44px 1fr; gap: 18px; }
    .section-title { font-size: clamp(1.6rem, 4.5vw, 2.4rem); }
}

/* Small phones — 480px */
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .section { padding: 56px 0; }

    /* Hero */
    .hero { padding-top: 80px; padding-bottom: 48px; }
    .ht-static, .ht-dynamic { font-size: clamp(1.8rem, 8vw, 2.2rem); }
    .hero-sub { font-size: 0.95rem; margin-bottom: 20px; }
    .hero-question {
        font-size: 1rem;
        padding: 14px 16px;
        border-radius: 4px;
        margin-bottom: 24px;
    }
    .sys-badge { font-size: 0.58rem; padding: 5px 10px; margin-bottom: 20px; }

    /* Stats — single column */
    .stats-inner { grid-template-columns: 1fr; }
    .stat-num { font-size: 1.6rem; }

    /* Why cards — stack */
    .why-cards { grid-template-columns: 1fr; }
    .text-large { font-size: 1rem; }
    .highlight-quote { font-size: 1.05rem; }

    /* Section headers */
    .section-title { font-size: clamp(1.5rem, 6vw, 1.9rem); }
    .section-sub { font-size: 0.95rem; }
    .chip { font-size: 0.65rem; padding: 4px 11px; }

    /* Vision */
    .vision-frame { padding: 28px 16px; border-radius: 14px; }
    .vision-title { font-size: clamp(1.3rem, 5.5vw, 1.7rem); }
    .vision-sub { font-size: 0.95rem; }
    .vision-body { font-size: 0.92rem; }

    /* Launch */
    .launch-title { font-size: clamp(1.8rem, 7vw, 2.2rem); }
    .launch-desc { font-size: 0.95rem; }
    .launch-tagline { font-size: 1rem; }
    .launch-countdown { max-width: 100%; }

    /* Build steps */
    .build-step { grid-template-columns: 38px 1fr; gap: 14px; padding-bottom: 36px; }
    .bs-num { width: 34px; height: 34px; font-size: 0.8rem; }
    .bs-content h3 { font-size: 1.05rem; }
    .bs-content p { font-size: 0.9rem; }

    /* Diff */
    .diff-text { font-size: 1.1rem; }

    /* Layer cards */
    .layer-card { padding: 20px 18px; }
    .layer-desc { font-size: 0.85rem; }

    /* Product cards */
    .product-card { padding: 22px 18px; }
    .pc-icon { font-size: 1.6rem; }

    /* Footer */
    .footer-inner { flex-direction: column; gap: 24px; }
    .footer-right { text-align: left; }
    .footer-email { font-size: 0.9rem; }

    /* Countdown — consistent pill look */
    .cd-num { font-size: 1.4rem; }
    .cd-unit { padding: 10px 6px; }
    .cd-label { font-size: 0.55rem; letter-spacing: 0.08em; }

    /* Nav mobile overlay */
    .mobile-link { font-size: 1.6rem; }
}

/* Very small phones — 360px */
@media (max-width: 360px) {
    .ht-static, .ht-dynamic { font-size: 1.65rem; }
    .hero-question { font-size: 0.95rem; }
    .ls-badge { font-size: 0.75rem; }
    .ls-date { font-size: 0.82rem; }
    .cd-num { font-size: 1.25rem; }
    .vision-title { font-size: 1.25rem; }
    .launch-title { font-size: 1.65rem; }
}