:root {
  --ink: #070b09;
  --ink-2: #0c1210;
  --paper: #eef1eb;
  --text: #e9efea;
  --muted: #93a19a;
  --orange: #ef6635;
  --orange-soft: #ff8a5c;
  --mint: #3ed0a5;
  --line: rgba(233, 239, 234, 0.12);
  color-scheme: dark;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--text); }
a { color: inherit; text-decoration: none; }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  height: 72px; padding: 0 48px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(7, 11, 9, 0.55);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 9px; font-size: 18px; font-weight: 800; }
.brand img { width: 30px; height: 30px; }
.brand span span { color: var(--orange); }
.nav-links { display: flex; align-items: center; gap: 30px; color: var(--muted); font-size: 13px; font-weight: 650; }
.nav-links > a:not(.nav-cta):hover { color: var(--text); }
.nav-cta {
  padding: 10px 18px; color: #fff; font-weight: 750;
  background: linear-gradient(135deg, var(--orange), #d84f22);
  border-radius: 999px;
  box-shadow: 0 0 0 1px rgba(255, 138, 92, 0.4), 0 6px 24px rgba(239, 102, 53, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 0 0 1px rgba(255, 138, 92, 0.6), 0 10px 32px rgba(239, 102, 53, 0.5); }

/* ---------- shared type ---------- */
.eyebrow, .section-label {
  margin: 0; font-size: 11px; font-weight: 800; letter-spacing: 0.16em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--mint); }
.eyebrow span { width: 26px; height: 1px; background: var(--orange); box-shadow: 0 0 8px var(--orange); }
.hero h1, .anatomy-copy h2, .training-heading h2, .nutrition-title-block h2 {
  margin: 26px 0 24px;
  font-size: clamp(44px, 5.2vw, 78px);
  line-height: 1.05; letter-spacing: -0.01em; font-weight: 780;
}

/* ---------- 01 hero / DNA ---------- */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center;
  overflow: hidden;
  background:
    radial-gradient(900px 520px at 82% 18%, rgba(239, 102, 53, 0.14), transparent 62%),
    radial-gradient(760px 620px at 68% 88%, rgba(62, 208, 165, 0.1), transparent 60%),
    linear-gradient(rgba(233, 239, 234, 0.033) 1px, transparent 1px) 0 0 / 100% 88px,
    linear-gradient(90deg, rgba(233, 239, 234, 0.033) 1px, transparent 1px) 0 0 / 88px 100%,
    var(--ink);
}
#dna-canvas {
  position: absolute; top: 0; right: 0; z-index: 0;
  width: 62%; height: 100%;
  mask-image: linear-gradient(90deg, transparent, #000 22%);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 22%);
}
.hero-inner { position: relative; z-index: 1; width: 100%; max-width: 1440px; margin: 0 auto; padding: 120px 48px 96px; }
.hero h1 { max-width: 640px; margin-bottom: 0; }
.hero h1 em {
  font-style: normal; color: var(--orange);
  text-shadow: 0 0 34px rgba(239, 102, 53, 0.55);
}
.hero-sub { max-width: 430px; margin: 26px 0 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 18px; margin-top: 44px; }
.btn-primary {
  padding: 15px 30px; border-radius: 999px;
  color: #fff; font-size: 14px; font-weight: 800;
  background: linear-gradient(135deg, var(--orange), #d84f22);
  box-shadow: 0 0 0 1px rgba(255, 138, 92, 0.45), 0 10px 34px rgba(239, 102, 53, 0.4);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(255, 138, 92, 0.7), 0 16px 44px rgba(239, 102, 53, 0.55); }
.btn-ghost {
  padding: 14px 26px; border-radius: 999px;
  color: var(--text); font-size: 14px; font-weight: 700;
  border: 1px solid var(--line);
  transition: border-color 0.25s ease, background 0.25s ease;
}
.btn-ghost:hover { border-color: rgba(233, 239, 234, 0.4); background: rgba(233, 239, 234, 0.05); }
.hero-scroll {
  position: absolute; z-index: 1; right: 48px; bottom: 36px;
  display: flex; align-items: center; gap: 10px; margin: 0;
  color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: 0.28em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.hero-scroll span {
  display: block; width: 1px; height: 44px;
  background: linear-gradient(var(--orange), transparent);
  animation: scroll-pulse 1.8s ease-in-out infinite;
}
@keyframes scroll-pulse { 0%, 100% { transform: scaleY(0.35); opacity: 0.4; } 50% { transform: scaleY(1); opacity: 1; } }

/* ---------- 02 anatomy / video ---------- */
.anatomy-section {
  position: relative; overflow: hidden;
  min-height: 640px; padding: 90px 48px;
  display: grid; grid-template-columns: minmax(300px, 0.9fr) minmax(420px, 1.1fr); gap: 60px; align-items: center;
  max-width: 1440px; margin: 0 auto;
  background: linear-gradient(160deg, #f4f6f1, #edf1ea);
  color: #182420;
  border-radius: 28px;
}
.anatomy-ghost {
  position: absolute; left: -18px; bottom: -52px; z-index: 0;
  font-size: 200px; font-weight: 800; letter-spacing: 0.02em; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px rgba(24, 36, 32, 0.1);
  pointer-events: none; user-select: none;
}
.anatomy-copy { position: relative; z-index: 1; }
.anatomy-copy .section-label { color: #4d6a75; }
.anatomy-copy > p { max-width: 420px; color: #485c66; font-size: 16px; line-height: 1.9; }
.anatomy-list { margin: 42px 0 0; border-top: 1px solid #c3d3da; }
.anatomy-list div { display: grid; grid-template-columns: 70px 1fr; gap: 20px; padding: 13px 0; border-bottom: 1px solid #c3d3da; }
.anatomy-list dt { font-weight: 800; }
.anatomy-list dd { margin: 0; color: #627681; font-size: 13px; }
.anatomy-media {
  position: relative; z-index: 1; justify-self: center;
  width: 360px; height: 620px;
  /* White-background video dissolves into the section background.
     Blend must live on the wrapper — on <video> itself it does not composite. */
  mix-blend-mode: multiply;
}
.anatomy-media video {
  display: block; width: 100%; height: 100%; object-fit: contain;
  filter: contrast(1.06) saturate(1.08);
}
.anatomy-media p {
  position: absolute; right: 6px; bottom: -30px; margin: 0;
  color: #8fa0a8; font-size: 10px; font-weight: 800; letter-spacing: 0.14em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

/* ---------- 03 training ---------- */
.training-section {
  position: relative; overflow: hidden;
  padding: 130px 48px;
  background:
    radial-gradient(880px 480px at 12% 0%, rgba(62, 208, 165, 0.08), transparent 60%),
    linear-gradient(rgba(233, 239, 234, 0.03) 1px, transparent 1px) 0 0 / 100% 88px,
    linear-gradient(90deg, rgba(233, 239, 234, 0.03) 1px, transparent 1px) 0 0 / 88px 100%,
    var(--ink-2);
}
.training-heading, .training-grid { max-width: 1344px; margin: 0 auto; }
.training-heading {
  display: grid; grid-template-columns: 1fr 1.05fr; gap: 22px 80px;
  padding-bottom: 66px; border-bottom: 1px solid var(--line);
}
.training-heading .section-label { grid-column: 1 / -1; color: var(--mint); }
.training-heading h2 { margin: 0; font-size: clamp(38px, 4vw, 56px); }
.training-heading > p { align-self: end; max-width: 380px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.button-light {
  width: fit-content; padding: 14px 0;
  color: var(--orange-soft); font-size: 14px; font-weight: 800;
  border-bottom: 1px solid var(--orange);
}
.button-light:hover { color: #ffb596; }
.training-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 56px; }
.training-grid article {
  position: relative; min-height: 260px; padding: 30px 28px;
  border: 1px solid var(--line); border-radius: 16px;
  background: linear-gradient(160deg, rgba(233, 239, 234, 0.045), rgba(233, 239, 234, 0.012));
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.training-grid article:hover {
  transform: translateY(-6px);
  border-color: rgba(239, 102, 53, 0.55);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45), 0 0 40px rgba(239, 102, 53, 0.12) inset;
}
.training-grid span {
  color: var(--orange); font-size: 12px; font-weight: 800; letter-spacing: 0.12em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.training-grid h3 { margin: 64px 0 12px; font-size: 24px; }
.training-grid p { max-width: 270px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.training-grid i {
  position: absolute; top: 26px; right: 26px; font-style: normal;
  color: var(--orange); opacity: 0; transform: translateX(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.training-grid article:hover i { opacity: 1; transform: translateX(0); }

/* ---------- 04 nutrition ---------- */
.nutrition-section {
  position: relative; overflow: hidden;
  min-height: 640px; padding: 120px 48px 90px;
  background:
    radial-gradient(900px 520px at 88% 110%, rgba(255, 196, 158, 0.35), transparent 60%),
    linear-gradient(150deg, #f0723f, #d8562a 55%, #b8431d);
  color: #fff;
}
.nutrition-ghost {
  position: absolute; right: -30px; top: -58px; z-index: 0;
  font-size: 260px; font-weight: 800; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px rgba(255, 255, 255, 0.22);
  pointer-events: none; user-select: none;
}
.nutrition-title-block, .nutrition-cards, .nutrition-link { max-width: 1344px; margin-left: auto; margin-right: auto; }
.nutrition-title-block { position: relative; z-index: 1; }
.nutrition-title-block .section-label { color: #ffe0d3; }
.nutrition-title-block h2 { margin: 18px 0 0; }
.nutrition-cards {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(3, 1fr);
  margin-top: 64px; border-top: 1px solid rgba(255, 255, 255, 0.45);
}
.nutrition-cards article { min-height: 170px; padding: 26px 26px 12px 0; border-right: 1px solid rgba(255, 255, 255, 0.45); }
.nutrition-cards article + article { padding-left: 26px; }
.nutrition-cards article:last-child { border: 0; }
.nutrition-cards span {
  display: block; color: #ffe0d3; font-size: 10px; font-weight: 800; letter-spacing: 0.12em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.nutrition-cards strong { display: block; margin-top: 36px; font-size: 24px; }
.nutrition-cards p { max-width: 250px; margin: 10px 0 0; color: #fff0ea; font-size: 13px; line-height: 1.75; }
.nutrition-link {
  position: relative; z-index: 1; display: block; width: fit-content;
  margin-top: 60px; padding-bottom: 5px;
  border-bottom: 1px solid #fff; font-size: 14px; font-weight: 800;
}

/* ---------- footer ---------- */
footer {
  padding: 26px 48px; display: flex; align-items: center; gap: 22px;
  background: var(--ink); border-top: 1px solid var(--line);
  color: var(--muted); font-size: 12px;
}
footer strong { color: var(--text); letter-spacing: 0.08em; }
footer span { margin-right: auto; }
footer a { color: var(--orange-soft); font-weight: 800; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .nav { height: 64px; padding: 0 20px; }
  .nav-links > a:not(.nav-cta) { display: none; }
  #dna-canvas { width: 100%; opacity: 0.55; mask-image: none; -webkit-mask-image: none; }
  .hero-inner { padding: 110px 20px 90px; }
  .hero h1, .anatomy-copy h2, .training-heading h2, .nutrition-title-block h2 { font-size: 42px; }
  .hero-scroll { display: none; }
  .anatomy-section {
    min-height: 0; padding: 70px 20px 84px; margin: 0 12px;
    grid-template-columns: 1fr; gap: 20px; border-radius: 20px;
  }
  .anatomy-ghost { font-size: 120px; bottom: auto; top: -24px; left: 4px; }
  .anatomy-media { width: 270px; height: 465px; }
  .training-section { padding: 80px 20px; }
  .training-heading { display: block; padding-bottom: 42px; }
  .training-heading h2 { margin-top: 20px; }
  .training-heading > p { margin-top: 24px; }
  .button-light { display: inline-block; margin-top: 22px; }
  .training-grid { grid-template-columns: 1fr; margin-top: 40px; }
  .training-grid article { min-height: 0; }
  .training-grid h3 { margin-top: 28px; }
  .nutrition-section { min-height: 0; padding: 76px 20px; }
  .nutrition-ghost { font-size: 150px; top: -30px; }
  .nutrition-cards { grid-template-columns: 1fr; margin-top: 42px; }
  .nutrition-cards article, .nutrition-cards article + article {
    min-height: 0; padding: 22px 0; border-right: 0; border-bottom: 1px solid rgba(255, 255, 255, 0.45);
  }
  .nutrition-cards article:last-child { border-bottom: 0; }
  .nutrition-cards strong { margin-top: 14px; }
  .nutrition-link { margin-top: 38px; }
  footer { padding: 22px 20px; }
  footer span { display: none; }
}