/* ==========================================================================
   Studio Component Library — CSS
   Btn, Card, Badge, Toast, Skeleton, ProgressBar
   All colors/spacing via var() tokens from variables.css
   All animations use only transform + opacity (D-12)
   ========================================================================== */

/* -- Btn Spinner Keyframe ------------------------------------------------ */
@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* -- Skeleton Shimmer Keyframe ------------------------------------------- */
@keyframes skeleton-shimmer {
  100% { transform: translateX(100%); }
}

/* ==========================================================================
   1. Btn
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--duration-fast), opacity var(--duration-fast);
  user-select: none;
  background: none;
  color: inherit;
  line-height: 1.4;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn.loading {
  opacity: 0.7;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
  flex-shrink: 0;
}

/* -- Btn Variants -------------------------------------------------------- */

.btn-primary {
  background: var(--color-accent);
  color: #000;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-tertiary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.btn-danger {
  background: var(--color-btn-danger-bg);
  color: var(--color-error);
  border-color: var(--color-btn-danger-border);
}

.btn-danger:hover {
  opacity: 0.9;
}

.btn-icon {
  padding: var(--spacing-xs);
  aspect-ratio: 1;
  justify-content: center;
}

/* ==========================================================================
   2. Card
   ========================================================================== */

.card {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: transform var(--duration-fast), opacity var(--duration-fast);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  transform: translateY(-1px);
  border-color: var(--color-border-strong);
}

.card-selected {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent-muted);
}

/* ==========================================================================
   3. Badge
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2xs);
  padding: 2px var(--spacing-sm);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 500;
  font-family: var(--font-ui);
}

/* -- Phase color variants ------------------------------------------------ */
.badge-sources  { background: rgba(59,130,246,0.15);  color: #3b82f6; }
.badge-scenes   { background: rgba(139,92,246,0.15);  color: #8b5cf6; }
.badge-content  { background: rgba(16,185,129,0.15);  color: #10b981; }
.badge-outputs  { background: rgba(245,158,11,0.15);  color: #f59e0b; }
.badge-publish  { background: var(--color-accent-muted); color: var(--color-accent); }

/* -- Tool color variants ------------------------------------------------- */
.badge-image    { background: rgba(236,72,153,0.15);  color: #ec4899; }
.badge-video    { background: rgba(139,92,246,0.15);  color: #8b5cf6; }
.badge-audio    { background: rgba(6,182,212,0.15);   color: #06b6d4; }
.badge-pdf      { background: rgba(249,115,22,0.15);  color: #f97316; }
.badge-studio   { background: var(--color-accent-muted); color: var(--color-accent); }

/* -- Status variants ----------------------------------------------------- */
.badge-success  { background: rgba(63,185,80,0.15);   color: var(--color-success); }
.badge-error    { background: rgba(248,81,73,0.15);   color: var(--color-error); }
.badge-warning  { background: rgba(210,153,34,0.15);  color: var(--color-warning); }
.badge-info     { background: var(--color-accent-muted); color: var(--color-accent); }

/* ==========================================================================
   4. Toast
   ========================================================================== */

.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-lg);
  min-width: 280px;
  max-width: 420px;
  transform: translateX(0);
  opacity: 1;
  transition: transform var(--duration-normal), opacity var(--duration-normal);
  pointer-events: auto;
}

.toast.entering {
  transform: translateX(100%);
  opacity: 0;
}

.toast.exiting {
  transform: translateX(100%);
  opacity: 0;
}

/* -- Toast variants ------------------------------------------------------ */
.toast-success { background: var(--color-panel); border-left: 3px solid var(--color-success); }
.toast-error   { background: var(--color-panel); border-left: 3px solid var(--color-error); }
.toast-warning { background: var(--color-panel); border-left: 3px solid var(--color-warning); }
.toast-info    { background: var(--color-panel); border-left: 3px solid var(--color-accent); }

.toast-icon {
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
  color: var(--color-text);
}

.toast-close {
  margin-left: auto;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--duration-fast);
  color: var(--color-text-muted);
  font-size: var(--text-md);
  line-height: 1;
}

.toast-close:hover {
  opacity: 1;
}

/* ==========================================================================
   5. Skeleton
   ========================================================================== */

.skeleton {
  background: var(--skeleton-base);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, var(--skeleton-shine), transparent);
  animation: skeleton-shimmer var(--skeleton-duration) ease-in-out infinite;
}

.skeleton-text {
  height: 14px;
  width: 80%;
}

.skeleton-title {
  height: 20px;
  width: 60%;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.skeleton-card {
  height: 120px;
  width: 100%;
}

/* ==========================================================================
   6. ProgressBar
   ========================================================================== */

.progress {
  width: 100%;
  height: 6px;
  background: var(--color-surface);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-pill);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--duration-normal);
}

.progress-sm { height: 4px; }
.progress-lg { height: 10px; }