/* =========================================================
   공통 규칙 — 토큰만 참조합니다. 색 값을 직접 쓰지 않습니다.
   ========================================================= */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
}
body::before {
  content: ""; position: fixed; inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg);
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
@media (min-width: 720px) {
  .wrap { padding-left: max(32px, env(safe-area-inset-left, 0px)); padding-right: max(32px, env(safe-area-inset-right, 0px)); }
}

h1, h2, h3 { margin: 0; text-wrap: balance; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* 채워 넣을 자리 표시 */
.ph {
  font-family: var(--font-mono);
  color: var(--caution);
  border-bottom: 1px dashed currentColor;
  padding: 0 2px;
}

/* 버튼 */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 0 18px;
  border-radius: var(--r-sm);
  font: 600 var(--fs-small)/1 var(--font-sans);
  text-decoration: none; cursor: pointer;
  border: 1px solid transparent;
  transition: background-color .15s, border-color .15s, color .15s;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-text); }
.btn-ghost { border-color: var(--line-strong); color: var(--fg); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-text); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--r-sm); }

/* 섹션 머리말: 측정 눈금 + 라벨 */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: var(--fs-caption); font-weight: 600;
  color: var(--accent-text); letter-spacing: 0.04em;
}
.eyebrow::before {
  content: ""; width: 22px; height: 10px;
  background:
    linear-gradient(var(--accent), var(--accent)) 0 100% / 2px 10px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 10px 100% / 2px 6px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 20px 100% / 2px 10px no-repeat;
}

.section { padding-block: clamp(64px, 9vw, 120px); border-top: 1px solid var(--line); }
.section-head { display: grid; gap: 14px; max-width: 46rem; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head h2 { font-size: var(--fs-h2); line-height: 1.25; font-weight: 700; }
.section-head p { color: var(--muted); max-width: 40rem; }

/* 머리글 */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.logo { font-family: var(--font-logo); font-weight: 700; font-size: 1.2rem; letter-spacing: 0; text-decoration: none; }
.logo b { color: var(--accent-text); font-weight: 700; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { font-size: var(--fs-small); color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--fg); }
.nav .soon { color: var(--faint); font-size: var(--fs-small); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.theme-btn {
  width: 40px; height: 40px; border-radius: var(--r-sm);
  border: 1px solid var(--line-strong); background: transparent; color: var(--muted);
  font: 500 var(--fs-caption)/1 var(--font-sans); cursor: pointer;
}
.theme-btn:hover { color: var(--fg); }
@media (max-width: 760px) {
  .nav { display: none; }
  .header-actions { margin-left: auto; }
  .site-header .btn { padding: 0 12px; }
}

.site-footer { border-top: 1px solid var(--line); padding-block: 40px; color: var(--faint); font-size: var(--fs-caption); }