/* ============================================================
   Aive — tokens.css
   디자인 토큰 · 리셋 · 공통 타이포그래피 헬퍼
   모든 페이지에서 가장 먼저 로드.
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  /* Background */
  --bg: #0a0a0b;
  --bg-elev: #111114;
  --bg-card: #16161a;
  --bg-card-2: #1c1c22;

  /* Borders */
  --line: #26262c;
  --line-soft: #1e1e24;

  /* Text */
  --text: #f4f4f2;
  --text-sub: #a0a0a8;
  --text-mute: #6c6c74;

  /* Accent */
  --accent: #d4ff3a;       /* Lime Yellow */
  --accent-soft: #2e3a0c;  /* Dark Lime */
  --warn: #ff6b3d;
  --ok: #6ee7a0;

  /* Typography */
  --font-display: "Fraunces", "Pretendard Variable", serif;
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Radius */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-btn: 10px;
  --radius-pill: 100px;

  /* Layout */
  --container-max: 1240px;
  --container-pad: 32px;
  --section-pad: 140px;
  --nav-height: 72px;

  /* Color Scheme — 네이티브 폼 컨트롤(<select>, <option>, scrollbar 등)을 다크 모드로 렌더링 */
  /* Firefox에서 <option> 팝업이 다크로 그려지도록. Chrome·Edge는 app.css의 option 직접 스타일과 함께 작동 */
  color-scheme: dark;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
img, svg { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

/* ---------- Container ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ---------- Section ---------- */
.section {
  padding: var(--section-pad) 0;
  position: relative;
}
.section-head { margin-bottom: 72px; }
.section-head .eyebrow { margin-bottom: 20px; }
.section-head h2 { font-size: clamp(36px, 4vw, 56px); margin: 0 0 20px; }

/* ---------- Typography Helpers ---------- */
.h-display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--text);
}
.h-kor {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.sub-copy {
  color: var(--text-sub);
  font-size: 17px;
  line-height: 1.7;
  max-width: 620px;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
.eyebrow-mute {
  color: var(--text-mute);
}
.eyebrow-mute::before { display: none; }
.divider-num {
  font-family: var(--font-mono);
  color: var(--text-mute);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---------- Utility ---------- */
.text-accent { color: var(--accent); }
.text-warn { color: var(--warn); }
.text-ok { color: var(--ok); }
.text-mute { color: var(--text-mute); }
.text-sub { color: var(--text-sub); }
.center { text-align: center; }

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Mobile Container Adjust ---------- */
@media (max-width: 640px) {
  :root {
    --container-pad: 20px;
    --section-pad: 100px;
  }
}