/* =============================================
   COMPONENT LIBRARY
   Reusable UI components built on design-system.css
   ============================================= */

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
  min-width: 44px;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn--primary {
  background-color: var(--color-accent-teal);
  color: var(--color-bg-dark);
}

.btn--primary:hover {
  background-color: #3db891;
  box-shadow: var(--shadow-glow-teal);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-accent-gold);
  border: 1.5px solid var(--color-accent-gold);
}

.btn--secondary:hover {
  background-color: rgba(200, 168, 130, 0.08);
  box-shadow: var(--shadow-glow-gold);
}

.btn--ghost {
  background-color: rgba(255, 255, 255, 0.06);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.btn--danger {
  background-color: var(--color-danger);
  color: #fff;
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-small);
  min-height: 36px;
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-h3);
  min-height: 52px;
}

.btn--full {
  width: 100%;
}

.btn--icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* --- Cards --- */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.card--elevated {
  background-color: var(--color-bg-elevated);
  box-shadow: var(--shadow-md);
}

.card--interactive {
  cursor: pointer;
}

.card--interactive:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card--interactive:active {
  transform: translateY(0);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.card__title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.card__subtitle {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* --- Inputs --- */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.input-label {
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
}

.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-elevated);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 48px;
  transition: border-color var(--transition-fast);
  outline: none;
}

.input:focus {
  border-color: var(--color-accent-teal);
  box-shadow: 0 0 0 3px rgba(78, 204, 163, 0.12);
}

.input::placeholder {
  color: var(--color-text-muted);
}

.input--error {
  border-color: var(--color-danger);
}

.input-error-msg {
  font-size: var(--font-size-small);
  color: var(--color-danger);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-label);
  text-transform: uppercase;
}

.badge--success {
  background-color: rgba(78, 204, 163, 0.15);
  color: var(--color-success);
}

.badge--warning {
  background-color: rgba(255, 193, 7, 0.15);
  color: var(--color-warning);
}

.badge--danger {
  background-color: rgba(255, 107, 107, 0.15);
  color: var(--color-danger);
}

.badge--info {
  background-color: rgba(93, 173, 226, 0.15);
  color: var(--color-info);
}

.badge--gold {
  background-color: rgba(200, 168, 130, 0.15);
  color: var(--color-accent-gold);
}

/* --- Progress Ring (SVG-based) --- */
.progress-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.progress-ring__svg {
  transform: rotate(-90deg);
}

.progress-ring__track {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 4;
}

.progress-ring__fill {
  fill: none;
  stroke: var(--color-accent-teal);
  stroke-width: 4;
  stroke-linecap: round;
  transition: stroke-dashoffset var(--transition-slow);
}

.progress-ring__fill--gold {
  stroke: var(--color-accent-gold);
}

.progress-ring__label {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.progress-ring__value {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1;
}

.progress-ring__unit {
  font-size: var(--font-size-label);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* --- Toggle Switch --- */
.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  min-height: 44px;
  gap: var(--space-3);
}

.toggle__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle__track {
  width: 48px;
  height: 28px;
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  flex-shrink: 0;
}

.toggle__track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background-color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: all var(--transition-bounce);
}

.toggle__input:checked + .toggle__track {
  background-color: rgba(78, 204, 163, 0.2);
  border-color: var(--color-accent-teal);
}

.toggle__input:checked + .toggle__track::after {
  transform: translateX(20px);
  background-color: var(--color-accent-teal);
}

/* --- Divider --- */
.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-4) 0;
}

/* --- Avatar --- */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-elevated);
  border: 2px solid var(--color-accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-small);
  color: var(--color-accent-gold);
  flex-shrink: 0;
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- Loading Skeleton --- */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-card) 25%, var(--color-bg-elevated) 50%, var(--color-bg-card) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}