/* ============================================================================
   Samples-app shell — menu bar (Sim/View/Render/Samples/Help), category→sample
   tree, and registry-derived home grid. Menu bar uses the C gui.cpp theme:
   steel-blue accent on charcoal.
   ============================================================================ */

:root {
  --menubar-h: 34px;
  /* gui.cpp palette (ImVec4 → hex). */
  --sh-menubar-bg: #212429;
  --sh-popup-bg: #1a1b1d;
  --sh-frame-bg: #2e3036;
  --sh-header: #30363d;
  --sh-accent: #477aa8;
  --sh-accent-hi: #6199cc;
  --sh-accent-lo: #385c80;
  --sh-text: #e5e8ed;
  --sh-muted: #8b93a1;
  --sh-border: #343b46;
}

/* --- Menu bar ------------------------------------------------------------- */

.menubar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--menubar-h);
  z-index: 300;
  display: flex;
  align-items: stretch;
  background: var(--sh-menubar-bg);
  border-bottom: 1px solid #000;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
  font-family: var(--font);
  user-select: none;
}

.menubar-brand {
  display: flex;
  align-items: center;
  padding: 0 14px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: -0.2px;
  color: var(--sh-accent-hi);
  text-decoration: none;
  border-right: 1px solid #000;
}

.menu {
  position: relative;
  display: flex;
}

.menu-button {
  background: transparent;
  border: none;
  color: var(--sh-text);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  padding: 0 14px;
  cursor: pointer;
  height: 100%;
}

.menu-button:hover,
.menu.open .menu-button {
  background: var(--sh-accent-lo);
  color: #fff;
}

.menu-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  max-height: calc(100vh - var(--menubar-h) - 8px);
  overflow-y: auto;
  background: var(--sh-popup-bg);
  border: 1px solid var(--sh-border);
  border-radius: 0 0 4px 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  padding: 4px;
  z-index: 320;
}

.menu-panel.wide {
  min-width: 300px;
}

.menu.open .menu-panel {
  display: block;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--sh-text);
  font-family: var(--font);
  font-size: 12.5px;
  text-align: left;
  text-decoration: none;
  padding: 5px 8px;
  border-radius: 3px;
  cursor: pointer;
  white-space: nowrap;
}

.menu-item:hover {
  background: var(--sh-accent-lo);
  color: #fff;
}

.menu-item > span:nth-child(2),
.menu-sample > span:first-child {
  flex: 1;
}

.menu-tick {
  display: inline-block;
  width: 12px;
  text-align: center;
  color: var(--sh-accent-hi);
  font-size: 11px;
}

.menu-shortcut {
  color: var(--sh-muted);
  font-size: 11px;
  font-family: var(--font-mono);
  margin-left: 12px;
}

.menu-sep {
  height: 1px;
  background: var(--sh-border);
  margin: 4px 2px;
}

.menu-sublabel {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--sh-muted);
  padding: 6px 8px 2px;
}

.menu-slider {
  padding: 4px 8px 8px;
}

.menu-slider-head {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--sh-text);
  margin-bottom: 4px;
}

.menu-slider-val {
  color: var(--sh-accent-hi);
  font-family: var(--font-mono);
  font-size: 11px;
}

.menu-slider input[type="range"] {
  width: 100%;
  accent-color: var(--sh-accent);
}

/* Samples submenu (nested categories inside the Samples dropdown). */
.menu-cat-head {
  font-weight: 600;
}

.menu-cat-head::before {
  content: "▸";
  color: var(--sh-muted);
  font-size: 10px;
  margin-right: 2px;
}

.menu-cat.open .menu-cat-head::before {
  content: "▾";
}

.menu-cat-body {
  display: none;
  padding-left: 12px;
}

.menu-cat.open .menu-cat-body {
  display: block;
}

.menu-sample .s-tag {
  margin-left: auto;
}

.menu-sample.planned {
  color: var(--sh-muted);
  cursor: default;
}

.menu-sample.planned:hover {
  background: transparent;
}

.help-table {
  border-collapse: collapse;
  font-size: 12px;
  color: var(--sh-text);
  padding: 2px 8px;
}

.help-table td {
  padding: 2px 8px;
  vertical-align: top;
}

.help-table td:first-child {
  color: var(--sh-accent-hi);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.menu-about {
  font-size: 12px;
  line-height: 1.5;
  color: var(--sh-muted);
  padding: 4px 8px 8px;
  max-width: 320px;
  white-space: normal;
}

/* --- Layout offsets for the fixed menu bar -------------------------------- */

#sidebar {
  top: var(--menubar-h);
  height: calc(100vh - var(--menubar-h));
  min-height: 0;
}

#main-content {
  margin-top: var(--menubar-h);
  min-height: calc(100vh - var(--menubar-h));
}

.demo-page {
  height: calc(100vh - var(--menubar-h));
}

.logo-link {
  text-decoration: none;
}

/* --- Sidebar category→sample tree ----------------------------------------- */

.sample-tree {
  flex: 1;
  overflow-y: auto;
  padding: 8px 8px 16px;
}

.tree-home {
  display: block;
  padding: 8px 10px;
  margin-bottom: 6px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
}

.tree-home:hover {
  background: var(--surface-alt);
  color: var(--text);
}

.tree-home.active {
  background: var(--accent-light);
  color: var(--accent);
}

.tree-cat {
  margin-bottom: 1px;
}

.tree-cat-head {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  background: transparent;
  border: none;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text);
}

.tree-cat-head:hover {
  background: var(--surface-alt);
}

.tree-chevron {
  font-size: 10px;
  color: var(--text-muted);
  transition: transform 120ms ease;
  display: inline-block;
  transform: rotate(-90deg);
}

.tree-cat.open .tree-chevron {
  transform: rotate(0deg);
}

.tree-cat-name {
  flex: 1;
  text-align: left;
}

.tree-cat-count {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: 500;
}

.tree-cat-count.has-live {
  color: #15803d;
}

.tree-cat-body {
  display: none;
  padding: 2px 0 4px 8px;
}

.tree-cat.open .tree-cat-body {
  display: block;
}

.tree-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
}

.tree-item-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

a.tree-item:hover {
  background: var(--surface-alt);
  color: var(--text);
}

a.tree-item.active {
  background: var(--accent-light);
  color: var(--accent);
}

.tree-item.planned {
  color: var(--text-muted);
  opacity: 0.7;
  cursor: default;
}

/* Status tags (tree + menu). */
.s-tag {
  font-size: 8.5px;
  font-weight: 800;
  letter-spacing: 0.4px;
  border-radius: 8px;
  padding: 1px 5px;
  flex-shrink: 0;
}

.s-live {
  color: #15803d;
  border: 1px solid #15803d;
}

.s-partial {
  color: #b45309;
  border: 1px solid #d19a4c;
}

.s-planned {
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* --- Home category grid --------------------------------------------------- */

.badge-partial {
  font-size: 0.7rem;
  font-weight: 700;
  color: #b45309;
  border: 1px solid #d19a4c;
  border-radius: 10px;
  padding: 1px 8px;
  vertical-align: middle;
  letter-spacing: 0.4px;
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.cat-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: all var(--transition);
}

a.cat-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.cat-card.disabled {
  opacity: 0.72;
}

.cat-card .card-badge {
  position: absolute;
  top: 14px;
  right: 14px;
}

.cat-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
}

.cat-meter {
  height: 5px;
  border-radius: 3px;
  background: var(--surface-alt);
  overflow: hidden;
  margin-bottom: 6px;
}

.cat-meter-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #15803d, #2e8b57);
  border-radius: 3px;
}

.cat-count {
  font-size: 12px;
  color: var(--text-secondary);
}

/* --- Mobile --------------------------------------------------------------- */

@media (max-width: 768px) {
  .menu-toggle {
    top: 2px;
    left: 6px;
    width: 30px;
    height: 30px;
    z-index: 320;
    padding: 6px 6px;
    background: transparent;
    border-color: transparent;
    box-shadow: none;
  }

  .menu-toggle span {
    background: var(--sh-text);
  }

  .menubar {
    padding-left: 40px;
    overflow-x: auto;
  }

  .menubar-brand {
    display: none;
  }

  #sidebar {
    top: var(--menubar-h);
    height: calc(100vh - var(--menubar-h));
  }

  #main-content {
    margin-left: 0;
  }
}