/* ═══════════════════════════════════════════
   Bash Special Vars Reference — style.css
   Terminal dark theme + light mode variant
   ═══════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-card-hover: #1c2330;
  --bg-controls: #0d1117;
  --border: #30363d;
  --border-light: #21262d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #39d353;
  --accent-hover: #56e06d;
  --header-bg: #010409;

  /* Category badge colours */
  --cat-positional-bg: #1a2a1a;
  --cat-positional-text: #3fb950;
  --cat-special-bg: #1a1a3d;
  --cat-special-text: #79c0ff;
  --cat-expansion-bg: #2a1a3d;
  --cat-expansion-text: #d2a8ff;
  --cat-env-bg: #3d2a1a;
  --cat-env-text: #ffa657;
  --cat-array-bg: #3d1a1a;
  --cat-array-text: #ff7b72;
  --cat-process-bg: #1a2a3d;
  --cat-process-text: #58a6ff;

  --chip-bg: #21262d;
  --chip-bg-active: #1f6feb;
  --chip-text: #8b949e;
  --chip-text-active: #ffffff;

  --input-bg: #0d1117;
  --input-border: #30363d;
  --input-text: #e6edf3;

  --modal-overlay: rgba(1, 4, 9, 0.85);
  --modal-bg: #161b22;
  --modal-border: #30363d;

  --code-bg: #010409;
  --code-text: #39d353;
  --code-output-text: #8b949e;

  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans JP', sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-card: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-modal: 0 8px 32px rgba(0,0,0,0.6);

  --transition: 0.15s ease;
}

[data-theme="light"] {
  --bg: #f6f8fa;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f4f8;
  --bg-controls: #f6f8fa;
  --border: #d0d7de;
  --border-light: #e8ecf0;
  --text-primary: #1f2328;
  --text-secondary: #57606a;
  --text-muted: #848d97;
  --accent: #196127;
  --accent-hover: #22863a;
  --header-bg: #f0f4f8;

  --cat-positional-bg: #eafbea;
  --cat-positional-text: #196327;
  --cat-special-bg: #e8f1ff;
  --cat-special-text: #0550ae;
  --cat-expansion-bg: #f5eeff;
  --cat-expansion-text: #6e3dc0;
  --cat-env-bg: #fff4e6;
  --cat-env-text: #b35900;
  --cat-array-bg: #fff0ef;
  --cat-array-text: #c93c3c;
  --cat-process-bg: #e6f3ff;
  --cat-process-text: #0969da;

  --chip-bg: #eaeef2;
  --chip-bg-active: #0969da;
  --chip-text: #57606a;
  --chip-text-active: #ffffff;

  --input-bg: #ffffff;
  --input-border: #d0d7de;
  --input-text: #1f2328;

  --modal-overlay: rgba(31, 35, 40, 0.7);
  --modal-bg: #ffffff;
  --modal-border: #d0d7de;

  --code-bg: #f6f8fa;
  --code-text: #196127;
  --code-output-text: #57606a;

  --shadow-card: 0 1px 3px rgba(31,35,40,0.12);
  --shadow-modal: 0 8px 32px rgba(31,35,40,0.2);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* ── Header ── */
.site-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-title h1 {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent);
}

.subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.header-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.icon-btn {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.icon-btn:hover {
  background: var(--chip-bg-active);
  color: var(--chip-text-active);
  border-color: var(--chip-bg-active);
}

.icon-btn svg { width: 16px; height: 16px; }

[data-theme="dark"]  .icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="dark"]  .icon-sun  { display: block; }
[data-theme="light"] .icon-moon { display: block; }

/* ── Controls bar ── */
.controls-bar {
  background: var(--bg-controls);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 57px;
  z-index: 90;
}

.controls-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* ── Search ── */
.search-wrap {
  position: relative;
  flex: 1;
  min-width: 220px;
  max-width: 420px;
}

.search-icon {
  position: absolute;
  left: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: 0.45rem 0.75rem 0.45rem 2.2rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  color: var(--input-text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--transition);
}

#search-input:focus { border-color: var(--accent); }
#search-input::placeholder { color: var(--text-muted); }

/* ── Filter chips ── */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.filter-chip {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--chip-text);
  border-radius: 20px;
  padding: 0.25rem 0.75rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.filter-chip:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.filter-chip.active {
  background: var(--chip-bg-active);
  border-color: var(--chip-bg-active);
  color: var(--chip-text-active);
  font-weight: 600;
}

.result-count {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-left: auto;
  font-family: var(--font-mono);
}

/* ── Grid ── */
.main-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem;
}

.var-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-muted);
  padding: 3rem;
  font-size: 1rem;
}

/* ── Var card ── */
.var-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.var-card:hover,
.var-card:focus {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  outline: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.syntax-badge {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--code-bg);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.cat-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  white-space: nowrap;
}

.cat-positional { background: var(--cat-positional-bg); color: var(--cat-positional-text); }
.cat-special    { background: var(--cat-special-bg);    color: var(--cat-special-text);    }
.cat-expansion  { background: var(--cat-expansion-bg);  color: var(--cat-expansion-text);  }
.cat-env        { background: var(--cat-env-bg);        color: var(--cat-env-text);        }
.cat-array      { background: var(--cat-array-bg);      color: var(--cat-array-text);      }
.cat-process    { background: var(--cat-process-bg);    color: var(--cat-process-text);    }

.card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.card-example {
  background: var(--code-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.65rem;
  overflow-x: auto;
  font-size: 0;
}

.card-example code {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--code-text);
  white-space: pre;
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: var(--modal-bg);
  border: 1px solid var(--modal-border);
  border-radius: var(--radius-lg);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-modal);
  transform: scale(0.95) translateY(10px);
  transition: transform 0.2s ease;
}

.modal-overlay.open .modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--modal-bg);
  z-index: 1;
}

.modal-title-text {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

.modal-close {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 1.3rem;
  line-height: 1;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover { background: var(--chip-bg); color: var(--text-primary); }

.modal-body {
  padding: 1.25rem;
}

/* ── Detail list (dl) ── */
.detail-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem 1rem;
  font-size: 0.875rem;
}

.detail-list dt {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-top: 0.1rem;
  white-space: nowrap;
}

.detail-list dd {
  color: var(--text-secondary);
  line-height: 1.55;
}

.notes-text {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--text-muted);
}

/* ── Code blocks in modal ── */
.code-block-wrap {
  position: relative;
}

.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--code-text);
  white-space: pre;
}

.output-block code { color: var(--code-output-text); }

.copy-btn {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.copy-btn:hover {
  background: var(--chip-bg-active);
  color: var(--chip-text-active);
  border-color: var(--chip-bg-active);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .header-inner   { padding: 0.75rem 1rem; }
  .controls-inner { padding: 0.6rem 1rem; }
  .main-content   { padding: 1rem; }
  .var-grid       { grid-template-columns: 1fr; }
  .modal-dialog   { max-height: 95vh; }
  .header-title h1 { font-size: 1rem; }
  .subtitle       { display: none; }
  .detail-list    { grid-template-columns: 1fr; }
  .detail-list dt { padding-bottom: 0; }
}

/* ── Scrollbar ── */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }