/* ═══════════════════════════════════════
   LAYOUT.CSS — 페이지 구조
═══════════════════════════════════════ */

body {
  background: var(--bg);
  color: var(--ink);
  /* font-family: 'Libre Baskerville', 'Noto Serif KR', Georgia, serif; */
  font-family: 'Noto Sans KR', 'Noto Sans', sans-serif;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

/* ── MAX WIDTH WRAPPER ── */
.site-wrap {
  width: 100%;
  max-width: 120rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── MAIN CONTENT ── */
.main-content {
  flex: 1;
}

/* 종이 질감 오버레이 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.88' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* ── HEADER ── */
.site-header {
  background: var(--nav-bg);
  color: var(--nav-color);
  padding: 0 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.25rem;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background var(--transition);
  border-bottom: 1px solid var(--accent);
}

.site-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.375rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--nav-color);
  text-decoration: none;
  transition: color var(--transition);
}

.site-logo span {
  color: var(--accent);
  transition: color var(--transition);
}

nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

nav a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  font-size: 0.594rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.375rem 0.75rem;
  border-radius: 2px;
  transition: color 0.2s, background 0.2s;
}
nav a:hover { color: var(--nav-color); background: rgba(255,255,255,0.07); }

.theme-toggle {
  width: 2.375rem;
  height: 2.375rem;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  transition: all 0.2s;
  color: var(--nav-color);
  margin-left: 0.5rem;
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--accent);
}

/* ── HERO ── */
.hero-strip {
  padding: 2.25rem 1.75rem 1.75rem;
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition);
  position: relative;
  z-index: 1;
}

.hero-strip .kicker {
  font-size: 0.5625rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: 0.625rem;
  transition: color var(--transition);
}

.hero-headline {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.75rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.08;
  color: var(--ink);
  max-width: 43.75rem;
  transition: color var(--transition);
}

.hero-headline em {
  font-style: italic;
  color: var(--accent);
  transition: color var(--transition);
}

.hero-sub {
  font-size: 0.8125rem;
  color: var(--ink3);
  margin-top: 0.875rem;
  max-width: 32.5rem;
  line-height: 1.7;
  transition: color var(--transition);
}

/* ── SECTION LABEL ── */
.section-label {
  padding: 1.25rem 1.75rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  z-index: 1;
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border2);
  transition: background var(--transition);
}
.section-label span {
  font-size: 0.5625rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
  transition: color var(--transition);
}

/* ── MASONRY ── */
.masonry-wrap {
  padding: 0 1.25rem 2.5rem;
  position: relative;
  z-index: 1;
}

.masonry {
  column-count: 3;
  column-gap: 1rem;
}

/* ── FOOTER ── */
.site-footer {
  background: var(--nav-bg);
  color: rgba(255,255,255,0.3);
  padding: 1rem 1.75rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.5625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border-top: 1px solid var(--accent);
  transition: background var(--transition);
  position: relative;
  z-index: 1;
}

/* ── 하단 탭바 (모바일 전용, 기본 숨김) ── */
.bottom-tab {
  display: none;
}

/* ── RESPONSIVE ── */
@media (max-width: 56.25rem) {
  .masonry { column-count: 2; }
}

@media (max-width: 37.5rem) {
  nav { display: none; }
  .site-header { padding: 0 1rem; }
  .masonry { columns: 1; }
  .hero-strip { padding: 1.5rem 1rem 1.25rem; }
  .masonry-wrap { padding: 0 0.75rem 2rem; }
  .section-label { padding: 1rem 1rem 0.625rem; }
  body { padding-bottom: calc(3.5rem + env(safe-area-inset-bottom)); }

  .site-footer {
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    text-align: center;
  }

  /* 하단 탭바 활성화 */
  .bottom-tab {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3.5rem;
    background: var(--nav-bg);
    z-index: 100;
    justify-content: space-around;
    align-items: stretch;
    transition: background var(--transition);
  }

  .tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.1875rem;
    color: rgba(255,255,255,0.4);
    text-decoration: none;
    font-size: 0.53125rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    transition: color 0.2s;
    padding-bottom: env(safe-area-inset-bottom);
  }

  .tab-item svg {
    width: 1.25rem;
    height: 1.25rem;
    stroke: currentColor;
  }

  .tab-item:hover,
  .tab-item.active {
    color: var(--accent);
  }
}