#app {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 100dvh;
  height: 100dvh;
  overflow: hidden;
}

#main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100dvh;
  overflow: hidden;
}

#header-mount {
  flex-shrink: 0;
}

#page-container {
  flex: 1 1 0%;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 16px 24px;
}

/* ── Scale padding on wider viewports (above 1080p) ──────────────────── */
@media (min-width: 2000px) {
  #page-container {
    padding: 12px 28px 52px;
  }
}

@media (min-width: 2560px) {
  #page-container {
    padding: 16px 36px 64px;
  }
}

.page {
  animation: page-in var(--t-med) var(--ease);
}

@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-title-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 16px;
}

.page-title-row h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-title-row .page-subtitle {
  color: var(--muted);
  font-size: 12px;
}

/* ── Relics page: split sections ─────────────────────────────────────────── */
.relic-section {
  margin-bottom: 24px;
}

.relic-section-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.relic-section-empty {
  color: var(--muted);
  font-size: 12px;
  padding: 8px 0 4px;
}

/* ── Sidebar Mobile Backdrop ────────────────────────────────────────────── */
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s var(--ease), visibility 0.25s var(--ease);
}

.sidebar-backdrop.open {
  opacity: 1;
  visibility: visible;
}

/* ── Responsive Layout (< 1100px) ───────────────────────────────────────────── */
@media (max-width: 1100px) {
  #app {
    display: flex !important;
    flex-direction: column !important;
    width: 100vw !important;
    height: 100dvh !important;
    overflow: hidden !important;
  }

  #main {
    width: 100vw !important;
    height: 100dvh !important;
    flex: 1 !important;
    min-width: 0 !important;
    overflow: hidden !important;
  }

  #header-mount {
    flex-shrink: 0 !important;
  }

  #page-container {
    padding: 10px 14px 32px !important;
    overflow-y: auto !important;
  }
}