/* 글로벌 네비게이션 + 푸터 + 컨테이너 */
.g-nav {
  position: sticky; top: var(--space-3);
  z-index: var(--z-nav);
  margin: var(--space-3) auto 0;
  max-width: calc(var(--container) - 16px);
  padding: 10px 14px;
  display: flex; align-items: center; gap: var(--space-3);
}
.g-nav__inner {
  display: flex; align-items: center; gap: var(--space-4);
  width: 100%;
}
.g-logo {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none !important; color: var(--ink);
  flex-shrink: 0;
}
.g-logo__mark {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand-indigo), var(--brand-copper));
  color: #FFFFFF;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 14px;
  display: grid; place-items: center;
  letter-spacing: -0.02em;
}
.g-logo__text {
  font-weight: 700;
  font-size: var(--fz-15);
  letter-spacing: -0.01em;
}
.g-logo__sub {
  color: var(--ink-mute);
  font-size: var(--fz-12);
  font-weight: 500;
  margin-left: 6px;
}
.g-nav__links {
  display: flex; align-items: center; gap: 4px;
  flex: 1;
  margin-left: var(--space-4);
}
.g-nav__links a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  color: var(--ink-mute);
  font-size: var(--fz-14);
  font-weight: 500;
  text-decoration: none !important;
  transition: background var(--dur-2), color var(--dur-2);
}
.g-nav__links a:hover { color: var(--ink); background: var(--surface-glass-2); }
.g-nav__links a.is-active { color: var(--accent); background: rgba(31,58,138,0.08); }
:root[data-theme="dark"] .g-nav__links a.is-active { background: rgba(138,180,248,0.14); }
.g-nav__links a[aria-disabled="true"] {
  color: var(--ink-faint);
  cursor: not-allowed;
  pointer-events: none;
}
.g-nav__links a[aria-disabled="true"] .badge { margin-left: 6px; }

.g-nav__actions {
  display: flex; align-items: center; gap: var(--space-2);
  flex-shrink: 0;
}

.g-nav__menu-btn {
  display: none;
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  background: var(--surface-glass-2);
  border: 1px solid var(--line);
  align-items: center; justify-content: center;
  cursor: pointer;
}
.g-nav__menu-btn svg { width: 20px; height: 20px; }

@media (max-width: 980px) {
  .g-nav__links {
    position: absolute; top: calc(100% + 8px); left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: var(--surface-glass-2);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass-strong);
    padding: var(--space-2);
    margin-left: 0;
    display: none;
  }
  .g-nav__links.is-open { display: flex; }
  .g-nav__links a { padding: 12px 14px; border-radius: var(--radius-md); }
  .g-nav__menu-btn { display: inline-flex; }
  .g-nav { position: relative; }
}

/* Theme toggle */
.theme-toggle {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 10px 6px 8px;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--ink);
  cursor: pointer;
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  transition: background var(--dur-2), border-color var(--dur-2);
}
.theme-toggle:hover { border-color: var(--line-strong); }
.theme-toggle__track {
  position: relative; width: 38px; height: 20px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--brand-indigo), var(--brand-copper));
  display: inline-flex; align-items: center; justify-content: space-between;
  padding: 0 4px; color: #FFFFFF;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.18);
}
.theme-toggle__thumb {
  position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px;
  background: #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0,0,0,0.30);
  transition: transform var(--dur-3) var(--easing-emphasis);
}
:root[data-theme="dark"] .theme-toggle__thumb { transform: translateX(18px); }
.theme-toggle__sun, .theme-toggle__moon {
  width: 12px; height: 12px;
}
.theme-toggle__sun  { opacity: 1; }
.theme-toggle__moon { opacity: 0.55; }
:root[data-theme="dark"] .theme-toggle__sun  { opacity: 0.55; }
:root[data-theme="dark"] .theme-toggle__moon { opacity: 1; }
.theme-toggle__label {
  font-size: var(--fz-12);
  font-weight: 500;
  color: var(--ink-mute);
  min-width: 16px;
}

/* Model picker dropdown */
.mpick { position: relative; }
.mpick__btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 12px 7px 10px;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--ink);
  font-size: var(--fz-13);
  font-weight: 500;
  cursor: pointer;
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  transition: border-color var(--dur-2), background var(--dur-2);
}
.mpick__btn:hover { border-color: var(--line-strong); }
.mpick__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-indigo), var(--brand-copper));
  flex-shrink: 0;
}
.mpick__caret { width: 12px; height: 12px; opacity: 0.6; }
.mpick__btn.is-pulse { animation: mpickPulse 1.4s var(--easing-emphasis) 3; }
@keyframes mpickPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(31,58,138,0.0); }
  50% { box-shadow: 0 0 0 6px rgba(31,58,138,0.18); }
}

.mpick__menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  min-width: 280px;
  /* WHY: 솔리드 — 옵션 가독성 우선 */
  background: var(--bg-elev);
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 6px;
  z-index: var(--z-popover);
  display: none;
}
:root[data-theme="dark"] .mpick__menu {
  background: #000000;
  border-color: var(--line-strong);
}
.mpick.is-open .mpick__menu { display: block; animation: popIn var(--dur-3) var(--easing-emphasis); }
@keyframes popIn { from { opacity: 0; transform: translateY(-4px);} to { opacity: 1; transform: none; } }

.mpick__opt {
  display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center;
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  text-align: left;
  cursor: pointer;
  color: var(--ink);
  transition: background var(--dur-2);
}
.mpick__opt:hover { background: var(--surface-glass); }
.mpick__opt.is-selected { background: rgba(31,58,138,0.08); border-color: var(--line); }
:root[data-theme="dark"] .mpick__opt.is-selected { background: rgba(138,180,248,0.12); }

.mpick__opt-name { font-weight: 600; font-size: var(--fz-14); }
.mpick__opt-vendor { color: var(--ink-mute); font-size: var(--fz-12); margin-left: 6px; }
.mpick__opt-tag { color: var(--ink-mute); font-size: var(--fz-12); margin-top: 2px; line-height: 1.4; }
.mpick__opt-badge { font-size: var(--fz-11); padding: 2px 8px; border-radius: var(--radius-pill); background: var(--surface); border: 1px solid var(--line); color: var(--ink-mute); }

/* Footer */
.g-foot {
  margin-top: var(--space-16);
  padding: var(--space-10) 0 var(--space-8);
  border-top: 1px solid var(--line);
  background: var(--surface-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.g-foot__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: var(--space-8);
}
.g-foot__brand .g-logo { margin-bottom: var(--space-3); }
.g-foot__slogan { color: var(--ink-mute); font-size: var(--fz-13); line-height: 1.7; max-width: 36ch; }
.g-foot__col h4 { font-size: var(--fz-13); margin: 0 0 var(--space-3); color: var(--ink); letter-spacing: 0.02em; }
.g-foot__col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.g-foot__col a { color: var(--ink-mute); font-size: var(--fz-13); text-decoration: none; transition: color var(--dur-2); }
.g-foot__col a:hover { color: var(--accent); text-decoration: none; }
.g-foot__bottom {
  max-width: var(--container);
  margin: var(--space-8) auto 0;
  padding: var(--space-5) var(--space-6) 0;
  border-top: 1px dashed var(--line);
  display: flex; flex-wrap: wrap; gap: var(--space-3);
  justify-content: space-between;
  color: var(--ink-mute);
  font-size: var(--fz-12);
}

@media (max-width: 720px) {
  .g-foot__inner { grid-template-columns: 1fr; gap: var(--space-6); }
}

/* Section */
.section { padding: var(--space-12) 0; }
.section--tight { padding: var(--space-8) 0; }
.section__head { text-align: center; max-width: 720px; margin: 0 auto var(--space-8); }
.section__eye { color: var(--copper); font-size: var(--fz-13); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
:root[data-theme="dark"] .section__eye { color: var(--accent-soft); }
.section__title { margin: var(--space-2) 0 var(--space-3); }
.section__lede { color: var(--ink-soft); font-size: var(--fz-16); line-height: 1.7; }