/* layout.css — 컨테이너·헤더·푸터·그리드 */

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

@media (max-width: 640px) {
  .container { padding: 0 var(--sp-4); }
}

/* Top navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  height: var(--header-h);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 600;
  font-size: var(--fs-body-lg);
  color: var(--color-ink);
}
.site-header__brand:hover { text-decoration: none; }

.site-header__brand-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--r-md);
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--fs-sm);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.site-header__nav a {
  color: var(--color-charcoal);
  font-size: var(--fs-sm);
  font-weight: 500;
}
.site-header__nav a:hover { text-decoration: none; color: var(--color-ink); }
.site-header__nav a.is-active { color: var(--color-ink); }

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

@media (max-width: 640px) {
  .site-header__nav a { display: none; }
  .site-header__nav .nav-mobile-only { display: inline-flex; }
}

/* Page main */
.page {
  padding-block: var(--sp-12);
  min-height: calc(100vh - var(--header-h));
}

.page--narrow .container { max-width: 760px; }

.page-header {
  margin-bottom: var(--sp-8);
}
.page-header__title {
  margin: 0 0 var(--sp-2);
}
.page-header__subtitle {
  color: var(--color-steel);
  font-size: var(--fs-body-lg);
}

.section {
  margin-bottom: var(--sp-12);
}
.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--sp-4);
  gap: var(--sp-3);
}
.section__title {
  font-size: var(--fs-h4);
  font-weight: 600;
}
.section__hint {
  color: var(--color-steel);
  font-size: var(--fs-sm);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--sp-4);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.stack--lg { gap: var(--sp-6); }
.row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.row--between { justify-content: space-between; }
.row--wrap { flex-wrap: wrap; }
.spacer { flex: 1; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-hairline);
  padding-block: var(--sp-8);
  color: var(--color-steel);
  font-size: var(--fs-sm);
}
.site-footer .row { justify-content: space-between; }