/* ═══════════════════════════════════════
   LatexCraft v4.0 — components.css
   Buttons, inputs, badges, tooltips, cards, tabs
   ═══════════════════════════════════════ */

/* ─── BUTTONS ─── */
.btn {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: var(--accent-text);
  font: 650 13px/1 var(--font-ui);
  padding: 8px 18px;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--t-fast) var(--ease-snap);
  white-space: nowrap;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.18) inset,
    0 -1px 0 rgba(0,0,0,0.10) inset,
    0 2px 8px var(--accent-glow);
  letter-spacing: -0.005em;
}
.btn:hover {
  background: linear-gradient(180deg, var(--accent-hover) 0%, var(--accent) 100%);
  transform: translateY(-1px);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.25) inset,
    0 -1px 0 rgba(0,0,0,0.10) inset,
    0 8px 24px var(--accent-glow);
}
.btn:active {
  transform: scale(0.97) translateY(0);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.10) inset,
    0 -1px 0 rgba(0,0,0,0.15) inset,
    0 1px 3px var(--accent-glow);
}
.btn:disabled {
  opacity: 0.5; cursor: not-allowed;
  transform: none;
}

.btn-ghost {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--r-md);
  font: 500 13px/1.2 var(--font-ui);
  cursor: pointer;
  transition: all var(--t-fast) var(--ease-snap);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  letter-spacing: -0.005em;
}
.btn-ghost:hover {
  background: var(--bg-hover);
  border-color: var(--border-strong);
  color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-xs);
}
.btn-ghost:active { transform: scale(0.97); box-shadow: none; }
.btn-ghost.danger:hover {
  background: rgba(248,113,113,0.10);
  border-color: var(--color-error);
  color: var(--color-error);
}

.btn-icon {
  width: 34px; height: 34px;
  border-radius: var(--r-md);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 100ms var(--ease-snap);
  padding: 0;
  font: 600 13px/1 var(--font-ui);
}
.btn-icon:hover {
  background: var(--bg-hover);
  border-color: var(--border-subtle);
  color: var(--text-primary);
  transform: translateY(-1px);
}
.btn-icon:active { transform: scale(0.92) translateY(0); }
.btn-icon.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.btn-icon.has-error {
  background: rgba(248,113,113,0.10);
  border-color: rgba(248,113,113,0.4);
  color: var(--color-error);
}
.btn-icon.has-warn {
  background: rgba(251,146,60,0.10);
  border-color: rgba(251,146,60,0.4);
  color: var(--color-warning);
}

/* Toolbar tag button (the primary insertion buttons) */
.tag-btn {
  height: 30px;
  min-width: 30px;
  padding: 0 10px;
  font: 600 11px/1 var(--font-editor);
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all 100ms var(--ease-snap);
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.tag-btn:hover {
  color: var(--accent);
  background: var(--bg-hover);
  border-color: var(--border-default);
  box-shadow:
    inset 0 1px 0 rgba(245,158,11,0.20),
    0 1px 3px rgba(0,0,0,0.18);
  transform: translateY(-1px);
}
.tag-btn:active { transform: scale(0.92) translateY(0); }

/* Group tab (toolbar row 1) */
.group-tab {
  font: 500 12px/1 var(--font-ui);
  padding: 5px 14px;
  border-radius: 20px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 150ms var(--ease-snap);
  white-space: nowrap;
  letter-spacing: -0.005em;
}
.group-tab:hover {
  color: var(--text-secondary);
  background: var(--bg-hover);
  border-color: var(--border-subtle);
}
.group-tab.active {
  color: var(--text-primary);
  background: linear-gradient(180deg, var(--bg-active), var(--bg-hover));
  border-color: var(--border-strong);
  box-shadow:
    var(--shadow-xs),
    inset 0 1px 0 rgba(255,255,255,0.04);
}

/* Inputs */
.input {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--r-sm);
  padding: 7px 12px;
  font: 400 13px/1.4 var(--font-ui);
  color: var(--text-primary);
  transition: border var(--t-fast), box-shadow var(--t-fast);
  width: 100%;
}
.input::placeholder { color: var(--text-muted); }
.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.input.input-mono { font-family: var(--font-editor); font-size: 12px; }

.select {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  border-radius: var(--r-sm);
  padding: 7px 10px;
  font: 400 13px/1 var(--font-ui);
  cursor: pointer;
  width: 100%;
}
.select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* Toggle switch */
.toggle {
  width: 36px; height: 20px;
  background: var(--bg-active);
  border-radius: 10px;
  position: relative;
  cursor: pointer;
  transition: background var(--t-fast);
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.toggle::after {
  content: '';
  position: absolute;
  top: 1px; left: 1px;
  width: 16px; height: 16px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: transform var(--t-fast) var(--ease-snap), background var(--t-fast);
}
.toggle.on {
  background: var(--accent);
  border-color: var(--accent);
}
.toggle.on::after {
  transform: translateX(16px);
  background: var(--accent-text);
}

/* KBD badge */
kbd, .kbd {
  display: inline-block;
  background: var(--bg-active);
  border: 1px solid var(--border-strong);
  border-bottom: 2px solid var(--border-strong);
  border-radius: var(--r-xs);
  padding: 1px 5px;
  font: 600 10px/1.3 var(--font-editor);
  color: var(--text-secondary);
}

/* Tooltip (data-tooltip on any element) */
[data-tooltip] {
  position: relative;
}
[data-tooltip]::before, [data-tooltip]::after {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms 500ms;
  z-index: 1000;
}
[data-tooltip]::before {
  content: attr(data-tooltip);
  background: var(--bg-overlay);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 5px 10px;
  border-radius: var(--r-sm);
  font: 400 11px/1.3 var(--font-ui);
  white-space: nowrap;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  box-shadow: var(--shadow-sm);
}
[data-tooltip]::after {
  content: '';
  bottom: calc(100% + 3px);
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--border-strong);
}
[data-tooltip]:hover::before, [data-tooltip]:hover::after {
  opacity: 1;
}

/* Badge */
.badge {
  display: inline-block;
  font: 600 9px/1.4 var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 6px;
  border-radius: var(--r-xs);
  background: var(--bg-active);
  color: var(--text-secondary);
}
.badge.amber { background: var(--accent); color: var(--accent-text); }
.badge.success { background: var(--color-success); color: #052e16; }
.badge.error { background: var(--color-error); color: #450a0a; }

/* Card (used by export grid, snapshots) */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 14px;
  transition: all var(--t-fast);
  cursor: pointer;
}
.card:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.card.selected {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 0 1px var(--accent);
}

/* Section title (used in modals, panels) */
.section-title {
  font: 700 10px/1.2 var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin: 18px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}
.section-title:first-child { margin-top: 0; }

/* Theme swatch */
.theme-swatch {
  width: 28px; height: 28px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--t-fast) var(--ease-snap);
  position: relative;
}
.theme-swatch:hover { transform: scale(1.1); }
.theme-swatch.active {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.theme-swatch[data-theme-id="dark"]      { background: linear-gradient(135deg, #11111a, #f59e0b); }
.theme-swatch[data-theme-id="light"]     { background: linear-gradient(135deg, #ffffff, #d97706); }
.theme-swatch[data-theme-id="solarized"] { background: linear-gradient(135deg, #073642, #b58900); }
.theme-swatch[data-theme-id="ocean"]     { background: linear-gradient(135deg, #04111f, #06b6d4); }
.theme-swatch[data-theme-id="parchment"] { background: linear-gradient(135deg, #faf5e8, #c0392b); }

/* Animations */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes slideDown { from { transform: translateY(-12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes confetti-fall {
  0% { transform: translateY(-100vh) rotate(0); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}