:root {
  --bg: #09090b;
  --panel: #131315;
  --line: rgba(255, 255, 255, 0.08);
  --text: #ececee;
  --muted: #9b9ba3;
  --green: #a7dbad;
  --vivid: #34d97b;
  --red: #e7998b;
  --radius: 20px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 50% -200px, rgba(52, 217, 123, 0.10), transparent 70%),
    var(--bg);
  color: var(--text);
  font: 17px/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1200px, 100% - 48px); margin-inline: auto; }

h1, h2, h3 { margin: 0; letter-spacing: -0.035em; line-height: 1.05; font-weight: 650; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 6.4vw, 5rem); }
h2 { font-size: clamp(2rem, 4.2vw, 3.2rem); }
h3 { font-size: 1.15rem; letter-spacing: -0.01em; }
p { margin: 0; }
.grad {
  background: linear-gradient(90deg, var(--green), var(--vivid) 60%, #b8f0c9);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.eyebrow {
  color: var(--green);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  background: var(--green);
  color: #0b1a10;
  font-weight: 600;
  font-size: 0.98rem;
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 0 0 1px rgba(167, 219, 173, 0.4), 0 10px 30px -10px rgba(52, 217, 123, 0.6);
}
.btn:hover { transform: translateY(-1px); background: #bfe8c4; }
.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--line);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); }
.btn-small { padding: 8px 16px; font-size: 0.88rem; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  background: rgba(9, 9, 11, 0.7);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.02em; font-size: 1.1rem; }
.brand em { font-style: normal; color: var(--green); }
.nav-links { display: flex; gap: 28px; font-size: 0.92rem; color: var(--muted); }
.nav-links a:hover { color: var(--text); }

/* Hero */
.hero { position: relative; padding: 96px 0 40px; text-align: center; }
.hero-glow {
  position: absolute;
  inset: 300px 0 auto;
  height: 700px;
  background: url(img/ambient.webp) center / cover;
  filter: blur(90px) saturate(1.3);
  opacity: 0.35;
  pointer-events: none;
  mask-image: radial-gradient(closest-side, #000, transparent);
  -webkit-mask-image: radial-gradient(closest-side, #000, transparent);
}
.hero-copy { position: relative; display: grid; justify-items: center; gap: 26px; margin-bottom: 64px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 0.85rem;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--vivid); box-shadow: 0 0 12px var(--vivid); }
.lead { max-width: 620px; color: var(--muted); font-size: 1.2rem; }

/* App window frame */
.window {
  position: relative;
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  background: #0f0f10;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 50px 120px -30px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(0, 0, 0, 0.6);
}
.window-bar { display: flex; gap: 8px; padding: 12px 14px; background: #1a1a1c; border-bottom: 1px solid rgba(0, 0, 0, 0.5); }
.window-bar i { width: 12px; height: 12px; border-radius: 50%; background: #ff5f57; }
.window-bar i:nth-child(2) { background: #febc2e; }
.window-bar i:nth-child(3) { background: #28c840; }
/* Linked magnifier loupes */
.loupe-stage { --size: 24; --zoom: 2; cursor: crosshair; }
.loupe {
  position: absolute;
  left: calc(var(--x) * 1%);
  top: calc(var(--y) * 1%);
  width: calc(var(--size) * 1%);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  overflow: hidden;
  pointer-events: none;
  background: #0f0f10;
  border: 3px solid var(--ring);
  box-shadow: 0 18px 40px -10px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(0, 0, 0, 0.5);
  transition: left 0.4s ease, top 0.4s ease;
}
.pane-scores { position: relative; height: 2.6em; margin-top: 14px; }
.pane-scores b.score {
  position: absolute;
  top: 0;
  left: 25.54%;
  transform: translateX(-50%);
  padding: 4px 16px;
  border-radius: 999px;
  font-size: clamp(0.95rem, 2vw, 1.5rem);
}
.pane-scores b.score + b.score { left: 74.46%; }
.loupe.good { --ring: var(--vivid); }
.loupe.bad { --ring: var(--red); }
.loupe img {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(var(--zoom) * 10000% / var(--size));
  max-width: none;
  transform: translate(calc(var(--x) * -1%), calc(var(--y) * -1%));
  transition: transform 0.4s ease;
}
.loupe-stage.tracking .loupe, .loupe-stage.tracking .loupe img { transition: none; }
.hero-shot { box-shadow: 0 60px 160px -40px rgba(52, 217, 123, 0.25), 0 50px 120px -30px rgba(0, 0, 0, 0.9); }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 72px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
}
.stats div { padding: 26px 28px; display: grid; gap: 6px; }
.stats div + div { border-left: 1px solid var(--line); }
.stats strong { font-size: 2.1rem; letter-spacing: -0.04em; line-height: 1; font-weight: 650; }
.stats span { color: var(--muted); font-size: 0.92rem; line-height: 1.4; }

/* Feature sections */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr);
  gap: 56px;
  align-items: center;
  padding-top: 140px;
}
.feature-flip { grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr); }
.feature-flip > .feature-copy { order: 2; }
.feature-copy { display: grid; gap: 18px; }
.feature-copy > p:not(.eyebrow) { color: var(--muted); font-size: 1.08rem; }
.feature-copy .eyebrow { margin-bottom: -4px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 4px 0 0; list-style: none; }
.chips li {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.86rem;
}
.ticks { display: grid; gap: 10px; padding: 0; margin: 4px 0 0; list-style: none; font-size: 0.98rem; }
.ticks li { display: flex; gap: 10px; align-items: baseline; }
.ticks li::before { content: "✓"; color: var(--vivid); font-weight: 700; }

.score {
  display: inline-grid;
  place-items: center;
  min-width: 2.2em;
  padding: 2px 8px;
  border-radius: 8px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
}
.score.good { background: rgba(52, 217, 123, 0.16); color: #8ff0b4; }
.score.bad { background: rgba(231, 153, 139, 0.16); color: var(--red); }

/* Detection cards */
.detect-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.detect { margin: 0; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: var(--panel); }
.detect-frame { position: relative; }
.detect figcaption { display: flex; justify-content: space-between; align-items: center; padding: 12px 14px; font-size: 0.9rem; color: var(--muted); }
.det-box {
  position: absolute;
  border: 2px solid var(--vivid);
  border-radius: 6px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.35), 0 0 24px rgba(52, 217, 123, 0.35);
}
.det-box b {
  position: absolute;
  left: -2px;
  bottom: 100%;
  margin-bottom: 4px;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--vivid);
  color: #04140a;
  font-size: 0.7rem;
  white-space: nowrap;
}
.det-kp, .det-eye { position: absolute; transform: translate(-50%, -50%); border-radius: 50%; }
.det-kp { width: 7px; height: 7px; background: #fff; box-shadow: 0 0 0 2px rgba(52, 217, 123, 0.9); }
.det-eye { width: 22px; height: 22px; border: 2px solid #ff6fb5; box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4), 0 0 14px rgba(255, 111, 181, 0.6); }
.det-eye-small { width: 16px; height: 16px; }

/* Draw-in animation for overlays */
.js .detect-grid .det-box { opacity: 0; scale: 1.12; transition: opacity 0.6s ease 0.3s, scale 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) 0.3s; }
.js .detect-grid .det-kp, .js .detect-grid .det-eye { opacity: 0; scale: 0.4; transition: opacity 0.4s ease 0.9s, scale 0.4s ease 0.9s; }
.js .detect-grid .det-eye { transition-delay: 1.2s; }
.js .detect-grid.in .det-box, .js .detect-grid.in .det-kp, .js .detect-grid.in .det-eye { opacity: 1; scale: 1; }

/* Subject photo gallery */
.subject-showcase { grid-column: 1 / -1; padding-top: 16px; }
.subject-showcase .section-head { margin-bottom: 28px; }
.subject-filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.subject-filters button {
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font: 500 0.88rem var(--font);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.subject-filters button:hover { color: var(--text); border-color: rgba(167, 219, 173, 0.4); }
.subject-filters button[aria-pressed="true"] { background: var(--green); color: #0b1a10; border-color: var(--green); }
.subject-filters button:focus-visible, .subject-overlay-toggle:focus-visible {
  outline: 2px solid var(--vivid);
  outline-offset: 4px;
}
.subject-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 24px; margin: 20px 0 16px; }
.subject-count { text-align: center; color: var(--muted); font-size: 0.82rem; }
.subject-overlay-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  background: var(--panel);
  color: var(--muted);
  font: 500 0.78rem var(--font);
  cursor: pointer;
}
.subject-overlay-toggle::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.subject-overlay-toggle[aria-pressed="true"] { border-color: rgba(52, 217, 123, 0.35); color: var(--green); }
.subject-overlay-toggle[aria-pressed="true"]::before { background: var(--vivid); }
.subject-legend { display: flex; justify-content: center; gap: 24px; padding: 0; margin: 0 0 26px; list-style: none; color: var(--muted); font-size: 0.76rem; }
.subject-legend li { display: flex; align-items: center; gap: 7px; }
.legend-box { width: 12px; height: 10px; border: 1.5px solid var(--vivid); border-radius: 2px; }
.legend-pose { width: 15px; height: 3px; background: var(--vivid); position: relative; }
.legend-pose::before, .legend-pose::after { content: ""; position: absolute; top: -2px; width: 6px; height: 6px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 1px var(--vivid); }
.legend-pose::after { right: 0; }
.legend-eye { width: 12px; height: 12px; border: 1.5px solid #ff6fb5; border-radius: 50%; }
.subject-photos { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.subject-card { min-width: 0; margin: 0; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: var(--panel); }
.subject-filters[hidden], .subject-card[hidden], .subject-overlay-toggle[hidden] { display: none; }
.subject-photo { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #1a1a1c; }
.subject-photo img { width: 100%; height: 100%; object-fit: var(--subject-fit, cover); object-position: var(--subject-position, 50% 50%); }
.subject-photo .subject-overlay { position: absolute; inset: 0; object-fit: fill; object-position: 50% 50%; pointer-events: none; }
.overlays-hidden .subject-overlay { visibility: hidden; }
.subject-card figcaption { display: grid; gap: 10px; padding: 16px; }
.subject-card strong { font-size: 0.98rem; font-weight: 600; }
.subject-note { margin-top: 24px; color: var(--muted); font-size: 0.82rem; text-align: center; }

/* Before / after slider */
.compare-slider {
  position: relative;
  margin: 0;
  border-radius: 16px;
  border: 1px solid var(--line);
  aspect-ratio: 1120 / 700;
  user-select: none;
}
.compare-slider > img, .slider-top { border-radius: 16px; }
.compare-slider > img { width: 100%; height: 100%; object-fit: cover; }
.slider-top { position: absolute; inset: 0; overflow: hidden; clip-path: inset(0 calc(100% - var(--pos)) 0 0); }
.slider-top img { width: 100%; height: 100%; object-fit: cover; }
.slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--pos);
  width: 2px;
  margin-left: -1px;
  background: #fff;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}
.slider-handle::after {
  content: "‹ ›";
  position: absolute;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #fff;
  color: #111;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 2px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
}
.compare-slider input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
}
.compare-slider input:focus-visible ~ .slider-handle,
.compare-slider:has(input:focus-visible) .slider-handle { outline: 2px solid var(--vivid); outline-offset: 2px; }
.slider-tag {
  position: absolute;
  top: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px 6px 6px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 0.85rem;
  font-weight: 600;
  pointer-events: none;
}
.slider-tag.left { left: 14px; }
.slider-tag.right { right: 14px; }
.under { position: absolute; top: calc(100% + 12px); left: 0; color: var(--muted); font-size: 0.88rem; }

/* Wide screenshot + caption */
.wide-shot { padding-top: 110px; }
.caption { color: var(--muted); text-align: center; margin-top: 22px; font-size: 0.98rem; }
.caption b:not(.score) { color: var(--text); font-weight: 600; }

/* Intelligent grouping */
.grouping { padding-top: 88px; }
.subhead { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.section-head .sub { max-width: 620px; margin: 18px auto 0; color: var(--muted); font-size: 1.08rem; }
.pose-row { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 20px; align-items: end; margin-bottom: 48px; }
.pose-group {
  padding: 14px;
  border-radius: 22px;
  background: rgba(209, 209, 209, 0.9); /* the app's stack backdrop */
  color: #1a1e20;
}
.pose-single { padding: 14px; border-radius: 22px; border: 1px dashed rgba(255, 255, 255, 0.18); }
.pose-label { display: flex; gap: 10px; align-items: baseline; margin: 2px 4px 12px; font-size: 0.92rem; color: var(--muted); }
.pose-group .pose-label { color: #3c4144; }
.pose-label b { font-weight: 650; color: var(--text); }
.pose-group .pose-label b { color: #10301b; }
.pose-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pose-card { margin: 0; border-radius: 14px; overflow: hidden; background: var(--panel); border: 1px solid var(--line); }
.pose-frame { position: relative; }
.pose-frame svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.pose-frame line { stroke: var(--vivid); stroke-width: 2; stroke-linecap: round; vector-effect: non-scaling-stroke; opacity: 0.9; }
.pose-frame circle { fill: #fff; stroke: var(--vivid); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.pose-frame circle.eye { fill: none; stroke: #ff6fb5; stroke-width: 2; }
.pose-card figcaption { display: flex; justify-content: space-between; align-items: center; padding: 10px 12px; font-size: 0.86rem; color: var(--muted); }
.js .pose-frame svg { opacity: 0; transition: opacity 0.6s ease 0.5s; }
.js .pose-row.in .pose-frame svg { opacity: 1; }

/* Workflow bento */
.workflow { padding-top: 140px; }
.section-head { text-align: center; margin-bottom: 44px; }
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
}
.card p { color: var(--muted); font-size: 0.95rem; }
.card:first-child { grid-row: span 2; }
.card-wide { grid-column: 1 / -1; }
.keys { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; margin-top: 14px; font-size: 0.88rem; color: var(--muted); }
.keys span { display: flex; align-items: center; gap: 6px; }
kbd {
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  border-radius: 8px;
  background: linear-gradient(#2a2a2e, #1d1d20);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.6);
  color: var(--text);
  font: 600 0.85rem var(--font);
}
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }
.seg { display: inline-flex; padding: 3px; border-radius: 999px; background: rgba(255, 255, 255, 0.06); border: 1px solid var(--line); }
.seg button {
  border: 0;
  padding: 7px 16px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: 500 0.88rem var(--font);
  cursor: pointer;
}
.seg button[aria-selected="true"] { background: var(--text); color: #111; }
.theme-stage { display: grid; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); }
.theme-stage img { grid-area: 1 / 1; opacity: 0; transition: opacity 0.35s ease; }
.theme-stage img.active { opacity: 1; }

/* Download */
.final { display: grid; justify-items: center; gap: 22px; text-align: center; padding: 160px 0 120px; }
.final img { width: 96px; filter: drop-shadow(0 20px 40px rgba(52, 217, 123, 0.25)); }
.final p { color: var(--muted); }

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

/* Reveal on scroll */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1); }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .loupe, .loupe img { transition: none; }
  .js .reveal, .js .detect-grid .det-box, .js .detect-grid .det-kp, .js .detect-grid .det-eye {
    opacity: 1; transform: none; scale: 1; transition: none;
  }
}

/* Responsive */
@media (max-width: 980px) {
  .nav-links { display: none; }
  .feature, .feature-flip { grid-template-columns: 1fr; gap: 36px; padding-top: 110px; }
  .feature-flip > .feature-copy { order: 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stats div:nth-child(3) { border-left: 0; }
  .stats div:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .bento { grid-template-columns: 1fr 1fr; }
  .subject-photos { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pose-row { grid-template-columns: 1fr; }
  .card:first-child { grid-row: auto; grid-column: 1 / -1; }
  .keys { grid-template-columns: repeat(3, auto); justify-content: start; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding-top: 64px; }
  .detect-grid, .bento, .pose-pair { grid-template-columns: 1fr; }
  .subject-photos { grid-template-columns: 1fr; gap: 16px; }
  .subject-filters button { padding: 10px 14px; }
  .keys { grid-template-columns: 1fr 1fr; }
  .stats div { padding: 20px; }
  .window-bar { padding: 8px 10px; }
  .window-bar i { width: 9px; height: 9px; }
  .det-eye { width: 16px; height: 16px; }
  .det-kp { width: 5px; height: 5px; }
}
@media (max-width: 360px) {
  .keys { grid-template-columns: 1fr; }
}