/* ── RESET & TOKENS ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --purple: #a855f7;
  --indigo: #6366f1;
  --pink:   #ec4899;
  --bg:     #09090f;
  --bg2:    #0f0f1a;
  --card:   #12121f;
  --border: rgba(255,255,255,0.08);
  --text:   #f1f1ff;
  --muted:  #8888aa;
  --grad: linear-gradient(135deg, var(--purple), var(--indigo));
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }

/* ── UTILITIES ──────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.accent { color: var(--purple); }
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── BUTTONS ────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--grad);
  color: #fff;
  border: none; border-radius: 12px;
  padding: 12px 28px; font-size: 15px; font-weight: 600;
  cursor: pointer; transition: opacity .2s, transform .2s;
}
.btn-primary:hover { opacity: .85; transform: translateY(-2px); }
.btn-lg { padding: 16px 36px; font-size: 16px; border-radius: 14px; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
  border-radius: 12px; padding: 12px 28px;
  font-size: 15px; font-weight: 500;
  cursor: pointer; transition: border-color .2s, background .2s, transform .2s;
}
.btn-ghost:hover { border-color: var(--purple); background: rgba(168,85,247,.08); transform: translateY(-2px); }
.btn-lg.btn-ghost { padding: 16px 36px; font-size: 16px; border-radius: 14px; }
.btn-icon {
  background: rgba(255,255,255,.06); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 8px 12px;
  cursor: pointer; font-size: 16px; transition: background .2s;
}
.btn-icon:hover { background: rgba(168,85,247,.2); }

/* ── NAVBAR ─────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 0;
  background: rgba(9,9,15,.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: padding .3s;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 32px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px; font-weight: 700;
}
.logo-icon { font-size: 24px; }
.nav-links {
  display: flex; gap: 28px; list-style: none;
  margin-left: auto;
}
.nav-links a {
  color: var(--muted); font-size: 14px; font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta { margin-left: 16px; padding: 10px 22px; font-size: 14px; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; }

/* ── HERO ───────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: 60px;
  padding: 120px 60px 80px;
  position: relative; overflow: hidden;
  max-width: 1200px; margin: 0 auto;
}
.hero-bg {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
}
.orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .35;
}
.orb-1 { width: 500px; height: 500px; background: var(--purple); top: -100px; left: -100px; }
.orb-2 { width: 400px; height: 400px; background: var(--indigo); bottom: -50px; right: -80px; }
.orb-3 { width: 300px; height: 300px; background: var(--pink); top: 40%; left: 40%; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-content { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(168,85,247,.12);
  border: 1px solid rgba(168,85,247,.3);
  border-radius: 999px; padding: 8px 18px;
  font-size: 13px; color: var(--purple); font-weight: 500;
  margin-bottom: 28px;
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--purple);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(1.3)} }
.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800; line-height: 1.1;
  margin-bottom: 20px;
}
.hero-sub {
  color: var(--muted); font-size: 17px; line-height: 1.7;
  margin-bottom: 36px; max-width: 520px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 32px; font-weight: 800; color: var(--text);
}
.stat-unit { font-size: 20px; color: var(--purple); font-weight: 700; }
.stat-label { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

/* ── CAMERA FRAME ───────────────────────────────── */
.hero-visual { position: relative; z-index: 1; }
.camera-frame {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px; overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,.5), 0 0 0 1px rgba(168,85,247,.1);
}
.cam-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,.04);
  border-bottom: 1px solid var(--border);
}
.cam-dot { width: 12px; height: 12px; border-radius: 50%; }
.cam-dot.red { background: #ff5f57; }
.cam-dot.yellow { background: #febc2e; }
.cam-dot.green { background: #28c840; }
.cam-label { margin-left: 8px; font-size: 13px; color: var(--muted); }
.cam-body {
  position: relative; height: 320px;
  background: #060610;
  overflow: hidden;
}
.cam-overlay-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(168,85,247,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168,85,247,.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hand-silhouette {
  position: absolute; bottom: 10px; left: 50%;
  transform: translateX(-50%);
  width: 160px; height: 200px;
  animation: float 3s ease-in-out infinite;
  transition: opacity .25s;
  filter: drop-shadow(0 0 24px rgba(168,85,247,.45));
}
.hand-silhouette svg { width: 100%; height: 100%; }
@keyframes float { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(-12px)} }
.prediction-badge {
  position: absolute; top: 12px; left: 12px;
  background: rgba(0,0,0,.7); backdrop-filter: blur(8px);
  border: 1px solid rgba(168,85,247,.4);
  border-radius: 12px; padding: 8px 14px;
  display: flex; flex-direction: column; align-items: center;
}
.pred-letter {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 36px; font-weight: 800; color: var(--purple);
  line-height: 1;
}
.pred-conf { font-size: 11px; color: var(--muted); }
.scan-line {
  position: absolute; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--purple), transparent);
  animation: scan 2.5s ease-in-out infinite;
  top: 0;
}
@keyframes scan { 0%{top:0;opacity:0} 10%{opacity:1} 90%{opacity:1} 100%{top:100%;opacity:0} }
.cam-footer {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 16px;
  background: rgba(255,255,255,.03);
  border-top: 1px solid var(--border);
  font-size: 12px; color: var(--muted);
}
.cam-status { display: flex; align-items: center; gap: 8px; }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--muted);
}
.status-dot.active { background: #22c55e; animation: pulse 2s infinite; }

/* ── SCROLL INDICATOR ───────────────────────────── */
.scroll-indicator {
  position: absolute; bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--muted); font-size: 12px; z-index: 1;
}
.scroll-arrow { animation: bounce 1.5s infinite; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(6px)} }

/* ── SECTIONS ───────────────────────────────────── */
.section { padding: 100px 0; }
.section-dark { background: var(--bg2); }
.section-tag {
  display: inline-block;
  background: rgba(168,85,247,.12);
  border: 1px solid rgba(168,85,247,.25);
  color: var(--purple); font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1.5px;
  border-radius: 999px; padding: 6px 16px;
  margin-bottom: 20px;
}
.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(28px, 4vw, 48px); font-weight: 800;
  line-height: 1.2; margin-bottom: 16px;
}
.section-sub {
  color: var(--muted); font-size: 17px; line-height: 1.7;
  max-width: 640px; margin-bottom: 60px;
}

/* ── FEATURE GRID ───────────────────────────────── */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px;
  transition: border-color .3s, transform .3s;
}
.feature-card:hover {
  border-color: rgba(168,85,247,.4); transform: translateY(-4px);
}
.feat-icon { font-size: 32px; margin-bottom: 16px; }
.feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 14px; line-height: 1.6; }

/* ── DEMO LAYOUT ────────────────────────────────── */
.demo-layout {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 32px; align-items: start;
}
.demo-frame .cam-body.demo-cam-body { height: 380px; }
/* Demo hand SVG */
.demo-hand {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 8px;
}
.demo-hand-svg {
  width: 170px; height: 204px;
  animation: float 3s ease-in-out infinite;
  filter: drop-shadow(0 0 20px rgba(168,85,247,.6));
  transition: opacity .25s;
}
.demo-hand-svg svg { width: 100%; height: 100%; }
.demo-letter-badge {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 38px; font-weight: 900;
  background: var(--grad);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  filter: drop-shadow(0 0 12px rgba(168,85,247,.6));
  user-select: none;
}
.confidence-bar-wrap {
  position: absolute; bottom: 12px; left: 12px; right: 12px;
  display: flex; align-items: center; gap: 10px;
}
.conf-label { font-size: 11px; color: var(--muted); white-space: nowrap; }
.confidence-bar {
  flex: 1; height: 6px; background: rgba(255,255,255,.08);
  border-radius: 999px; overflow: hidden;
}
.conf-fill {
  height: 100%; border-radius: 999px;
  background: var(--grad);
  transition: width .4s ease;
}
.conf-pct { font-size: 11px; color: var(--purple); font-weight: 600; white-space: nowrap; }

/* Output box */
.output-box {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 20px; margin-bottom: 20px;
}
.output-label { font-size: 12px; color: var(--muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 1px; }
.output-text {
  min-height: 64px; font-size: 28px; font-weight: 700;
  font-family: 'Space Grotesk', sans-serif;
  word-break: break-all; color: var(--text);
  line-height: 1.4; margin-bottom: 12px;
}
.cursor-blink { animation: blink 1s step-end infinite; color: var(--purple); }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
.output-actions { display: flex; gap: 8px; }

/* Keyboard */
.keyboard-panel { margin-bottom: 20px; }
.keyboard-label { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.asl-keyboard {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.key-btn {
  width: 42px; height: 42px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text);
  font-size: 16px; font-weight: 700;
  cursor: pointer; transition: background .15s, border-color .15s, transform .1s;
  font-family: 'Space Grotesk', sans-serif;
}
.key-btn:hover { background: rgba(168,85,247,.2); border-color: var(--purple); transform: scale(1.1); }
.key-btn.active { background: var(--purple); border-color: var(--purple); color: #fff; }

/* Demo buttons */
.demo-buttons { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.demo-buttons .btn-primary, .demo-buttons .btn-ghost { padding: 10px 18px; font-size: 13px; border-radius: 10px; }

/* Toggle */
.toggle-row {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 16px;
  cursor: pointer; font-size: 14px; color: var(--muted);
}
.toggle { position: relative; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; cursor: pointer; inset: 0;
  background: rgba(255,255,255,.1); border-radius: 999px;
  transition: .3s;
}
.toggle-slider::before {
  content: ''; position: absolute;
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff; left: 3px; top: 3px; transition: .3s;
}
.toggle input:checked + .toggle-slider { background: var(--purple); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ── PIPELINE ───────────────────────────────────── */
.pipeline {
  display: flex; align-items: stretch; gap: 0; flex-wrap: wrap;
  margin-bottom: 40px;
}
.pipeline-step {
  flex: 1; min-width: 160px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px 20px;
  text-align: center;
  transition: border-color .3s, transform .3s;
}
.pipeline-step:hover { border-color: rgba(168,85,247,.4); transform: translateY(-4px); }
.pipeline-arrow {
  display: flex; align-items: center; justify-content: center;
  color: var(--purple); font-size: 22px; padding: 0 8px;
  align-self: center;
}
.step-num {
  font-size: 11px; font-weight: 700; color: var(--purple);
  letter-spacing: 2px; margin-bottom: 8px;
}
.step-icon { font-size: 28px; margin-bottom: 10px; }
.pipeline-step h3 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.pipeline-step p { font-size: 13px; color: var(--muted); line-height: 1.5; }
.callout {
  display: flex; gap: 20px; align-items: flex-start;
  background: rgba(168,85,247,.08);
  border: 1px solid rgba(168,85,247,.25);
  border-radius: 16px; padding: 24px;
}
.callout-icon { font-size: 28px; flex-shrink: 0; }
.callout h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.callout p { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* ── METRICS ────────────────────────────────────── */
.metrics-grid {
  display: grid; grid-template-columns: auto 1fr; gap: 48px;
  align-items: center; margin-bottom: 48px;
}
.main-metric { text-align: center; }
.metric-ring { position: relative; width: 160px; height: 160px; margin: 0 auto 16px; }
.ring-svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: rgba(255,255,255,.06); stroke-width: 8; }
.ring-fill {
  fill: none; stroke: url(#ringGrad); stroke-width: 8;
  stroke-linecap: round; transition: stroke-dashoffset 1.5s ease;
}
.ring-center {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.ring-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 40px; font-weight: 900; color: var(--text);
}
.ring-pct { font-size: 20px; color: var(--purple); font-weight: 700; }
.main-metric h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.main-metric p { font-size: 13px; color: var(--muted); }
.perf-bars { display: flex; flex-direction: column; gap: 16px; }
.perf-row { display: flex; align-items: center; gap: 14px; }
.perf-label { width: 220px; font-size: 14px; color: var(--muted); flex-shrink: 0; }
.perf-bar-track {
  flex: 1; height: 8px; background: rgba(255,255,255,.06);
  border-radius: 999px; overflow: hidden;
}
.perf-bar-fill {
  height: 100%; border-radius: 999px;
  background: var(--grad);
  transition: width 1.2s ease;
}
.perf-val { width: 48px; text-align: right; font-size: 14px; font-weight: 700; color: var(--purple); }

/* Tech stack */
.tech-stack { border-top: 1px solid var(--border); padding-top: 36px; }
.tech-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 14px; }
.tech-pills { display: flex; flex-wrap: wrap; gap: 10px; }
.tech-pill {
  background: rgba(255,255,255,.05); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 16px;
  font-size: 13px; color: var(--muted);
  transition: border-color .2s, color .2s;
}
.tech-pill:hover { border-color: var(--purple); color: var(--purple); }

/* ── ALPHABET GRID ──────────────────────────────── */
.alphabet-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 12px;
}
.alpha-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 16px 10px;
  text-align: center; cursor: default;
  transition: border-color .25s, transform .25s, background .25s;
}
.alpha-card:hover {
  border-color: var(--purple); transform: translateY(-4px) scale(1.04);
  background: rgba(168,85,247,.1);
}
.alpha-letter {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px; font-weight: 900;
  background: var(--grad);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.alpha-desc { font-size: 10px; color: var(--muted); margin-top: 6px; line-height: 1.3; }

/* ── FOOTER ─────────────────────────────────────── */
.footer {
  background: var(--bg2); border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}
.footer-top {
  display: flex; flex-direction: column; gap: 16px;
  margin-bottom: 40px;
}
.footer-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px; font-weight: 700;
}
.footer-name .accent { color: var(--purple); }
.footer-desc { color: var(--muted); font-size: 15px; max-width: 480px; line-height: 1.7; }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap;
  gap: 12px; border-top: 1px solid var(--border); padding-top: 24px;
  font-size: 13px; color: var(--muted);
}

/* ── MINDMAP ────────────────────────────────────── */
.mindmap-container {
  margin: 48px 0;
  padding: 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}
.mindmap-title {
  text-align: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 32px;
  color: var(--text);
}
.mindmap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.mm-node {
  background: rgba(168,85,247,.08);
  border: 1px solid rgba(168,85,247,.3);
  padding: 14px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  color: #e9d5ff;
  position: relative;
  z-index: 2;
  text-align: center;
  min-width: 120px;
  animation: pulse-node 3s infinite;
}
.mm-node:nth-child(3) { animation-delay: 0.5s; }
.mm-node:nth-child(5) { animation-delay: 1s; }
.mm-node:nth-child(7) { animation-delay: 1.5s; }
.mm-node:nth-child(9) { animation-delay: 2s; }

.mm-arrow {
  color: var(--purple);
  font-size: 20px;
  animation: slide-arrow 2s infinite ease-in-out;
}

@keyframes pulse-node {
  0% { box-shadow: 0 0 0 0 rgba(168,85,247,0.3); }
  70% { box-shadow: 0 0 0 12px rgba(168,85,247,0); }
  100% { box-shadow: 0 0 0 0 rgba(168,85,247,0); }
}
@keyframes slide-arrow {
  0%, 100% { transform: translateX(-4px); opacity: 0.5; }
  50% { transform: translateX(4px); opacity: 1; }
}

@media (max-width: 900px) {
  .mindmap { flex-direction: column; gap: 8px; }
  .mm-arrow { transform: rotate(90deg); animation: slide-arrow-down 2s infinite ease-in-out; }
}
@keyframes slide-arrow-down {
  0%, 100% { transform: translateY(-4px) rotate(90deg); opacity: 0.5; }
  50% { transform: translateY(4px) rotate(90deg); opacity: 1; }
}

/* ── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 100px 24px 80px; text-align: center; }
  .hero-visual { display: none; }
  .hero-stats { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-sub { margin: 0 auto 36px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .demo-layout { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr; }
  .pipeline { flex-direction: column; }
  .pipeline-arrow { transform: rotate(90deg); }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; margin-left: auto; }
  .perf-label { width: 160px; font-size: 12px; }
}
@media (max-width: 600px) {
  .feature-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 14px; }
  .stat-divider { display: none; }
}

/* ── REVEAL ANIMATIONS ──────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* SVG gradient for ring */
svg defs { position: absolute; }