/* PetVora — Warm Organic (Palette B) | NINA visual-spec v1.0 */

:root {
  --void:        #0d0b09;
  --deep:        #131009;
  --panel:       #1c1710;
  --panel-hover: #241f16;
  --edge:        #2e2618;
  --edge-hover:  #46391f;

  --ink:         #ede5d8;
  --ink-soft:    #9e8e78;
  --ink-faint:   #5a4e3c;

  --amber:       #f59e0b;
  --sage:        #86efac;
  --terra:       #e07056;
  --cream:       #fde68a;
  --moss:        #4ade80;

  --r-sm:   8px;
  --r-md:   14px;
  --r-lg:   20px;
  --r-pill: 100px;

  --container-reading: 820px;
  --container-wide:    1120px;

  --spring: cubic-bezier(0.16, 1, 0.3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', system-ui, sans-serif;
  font-weight: 400;
  color: var(--ink);
  background: var(--void);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--amber); text-decoration: none; transition: color 180ms var(--spring); }
a:hover { color: var(--cream); }

.serif {
  font-family: 'Source Serif 4', Georgia, serif;
  font-optical-sizing: auto;
  font-style: italic;
}

.mono { font-family: 'JetBrains Mono', monospace; font-variant-numeric: tabular-nums; }

/* ---------- nav ---------- */
nav.sticky {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13, 11, 9, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--edge);
}
.nav-inner {
  max-width: var(--container-wide); margin: 0 auto;
  padding: 16px 28px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: 1.15rem; letter-spacing: 0.3px; }
.brand .paw { font-size: 1.4rem; filter: saturate(1.1); }
.brand b { color: var(--ink); font-weight: 600; }
.nav-links { display: flex; gap: 26px; font-size: 0.92rem; }
.nav-links a { color: var(--ink-soft); }
.nav-links a:hover { color: var(--cream); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse 50% 40% at 50% 32%, rgba(245,158,11,0.10) 0%, transparent 70%),
    radial-gradient(ellipse 42% 32% at 78% 22%, rgba(224,112,86,0.07) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 22% 80%, rgba(134,239,172,0.04) 0%, transparent 70%),
    var(--void);
  padding: 120px 28px 96px;
  text-align: center;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(245,158,11,0.025) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 0%, transparent 75%);
}
.hero-inner { position: relative; max-width: 760px; margin: 0 auto; }
.eyebrow {
  display: inline-block;
  font-size: 0.72rem; letter-spacing: 3px; text-transform: uppercase;
  color: var(--amber); padding: 7px 16px;
  border: 1px solid var(--edge-hover); border-radius: var(--r-pill);
  background: rgba(245,158,11,0.05);
  margin-bottom: 28px;
}
h1.hero-title {
  font-family: 'Source Serif 4', Georgia, serif;
  font-style: italic; font-optical-sizing: auto;
  font-weight: 500;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1.12; letter-spacing: -0.5px;
  color: var(--ink);
  margin-bottom: 22px;
}
h1.hero-title .accent { color: var(--cream); }
.hero-sub {
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  color: var(--ink-soft); line-height: 1.7;
  max-width: 540px; margin: 0 auto 38px;
}
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: var(--r-pill);
  font-size: 0.95rem; font-weight: 500;
  transition: all 200ms var(--spring); cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--amber); color: #1a1206; }
.btn-primary:hover { background: var(--cream); color: #1a1206; transform: translateY(-2px); box-shadow: 0 10px 30px rgba(245,158,11,0.25); }
.btn-ghost { border-color: var(--edge-hover); color: var(--ink); }
.btn-ghost:hover { border-color: var(--amber); color: var(--cream); transform: translateY(-2px); }

/* ---------- sections ---------- */
section.block { padding: 84px 28px; }
.wrap { max-width: var(--container-wide); margin: 0 auto; }
.wrap-read { max-width: var(--container-reading); margin: 0 auto; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .kicker { font-size: 0.72rem; letter-spacing: 3px; text-transform: uppercase; color: var(--terra); }
.section-head h2 {
  font-family: 'Source Serif 4', Georgia, serif; font-style: italic;
  font-weight: 500; font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  color: var(--ink); margin-top: 10px;
}
.section-head p { color: var(--ink-soft); max-width: 520px; margin: 14px auto 0; }

/* ---------- pillar cards ---------- */
.pillar-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px;
}
.pillar {
  background: var(--panel); border: 1px solid var(--edge);
  border-radius: var(--r-lg); padding: 32px 26px;
  transition: all 240ms var(--spring);
}
.pillar:hover { background: var(--panel-hover); border-color: var(--edge-hover); transform: translateY(-4px); box-shadow: 0 14px 40px rgba(0,0,0,0.35); }
.pillar .ic {
  width: 52px; height: 52px; border-radius: var(--r-md);
  display: grid; place-items: center; font-size: 1.5rem;
  background: rgba(245,158,11,0.08); border: 1px solid var(--edge-hover);
  margin-bottom: 20px;
}
.pillar h3 { font-size: 1.18rem; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.pillar .zh { font-size: 0.82rem; color: var(--amber); letter-spacing: 1px; margin-bottom: 12px; }
.pillar p { font-size: 0.93rem; color: var(--ink-soft); line-height: 1.65; }

/* ---------- stats ---------- */
.stat-band { background: var(--deep); border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 24px; text-align: center; }
.metric-val { font-family: 'JetBrains Mono', monospace; font-size: 2rem; font-weight: 700; color: var(--cream); }
.metric-label { font-size: 0.72rem; letter-spacing: 2px; text-transform: uppercase; color: var(--ink-soft); margin-top: 6px; }

/* ---------- reading content (about/privacy) ---------- */
.doc h1.doc-title {
  font-family: 'Source Serif 4', Georgia, serif; font-style: italic;
  font-weight: 500; font-size: clamp(2rem, 4.5vw, 2.8rem);
  color: var(--ink); margin-bottom: 10px;
}
.doc .updated { color: var(--ink-faint); font-size: 0.85rem; margin-bottom: 40px; }
.doc h2 {
  font-size: 1.3rem; font-weight: 600; color: var(--cream);
  margin: 40px 0 14px; padding-top: 8px;
}
.doc h3 { font-size: 1.05rem; font-weight: 600; color: var(--ink); margin: 26px 0 10px; }
.doc p { color: var(--ink-soft); margin-bottom: 16px; }
.doc ul { color: var(--ink-soft); margin: 0 0 18px 22px; }
.doc li { margin-bottom: 8px; }
.doc strong { color: var(--ink); font-weight: 600; }
.insight-box {
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 18px 22px; background: rgba(245,158,11,0.05);
  margin: 26px 0; color: var(--ink-soft);
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--edge); padding: 44px 28px;
  background: var(--deep);
}
.foot-inner {
  max-width: var(--container-wide); margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 20px;
  align-items: center; justify-content: space-between;
}
.foot-links { display: flex; gap: 22px; font-size: 0.9rem; }
.foot-links a { color: var(--ink-soft); }
.foot-links a:hover { color: var(--cream); }
.foot-meta { font-size: 0.82rem; color: var(--ink-faint); }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s var(--spring), transform 0.7s var(--spring); }
.reveal.in { opacity: 1; transform: translateY(0); }

@media (max-width: 640px) {
  .nav-links { gap: 16px; font-size: 0.85rem; }
  .hero { padding: 84px 22px 70px; }
  section.block { padding: 60px 22px; }
}