/* ============================================================
   components.css — Reusable UI Components
   ============================================================ */

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-6);
  height: 50px;
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: var(--font-semi);
  letter-spacing: 0.01em;
  transition: all var(--transition-base);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  border: none;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}

.btn:active::after {
  background: rgba(255,255,255,0.15);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn--primary:hover { background: var(--color-primary-light); }
.btn--primary:active { transform: scale(0.98); }

.btn--secondary {
  background: var(--color-surface-2);
  color: var(--color-text-primary);
}
.btn--secondary:hover { background: var(--color-border); }

.btn--outline {
  background: transparent;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
}
.btn--outline:hover { background: rgba(var(--color-primary-rgb), 0.06); }

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

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  height: 40px;
  padding: 0 var(--space-4);
}

.btn--sm {
  height: 36px;
  padding: 0 var(--space-4);
  font-size: var(--text-sm);
}

.btn--lg {
  height: 56px;
  font-size: var(--text-lg);
}

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

.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn--loading {
  color: transparent !important;
  pointer-events: none;
}
.btn--loading::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  padding-left: var(--space-1);
}

.form-input {
  width: 100%;
  height: 52px;
  padding: 0 var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.12);
}

.form-input.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.10);
}

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

.form-input-wrap {
  position: relative;
}

.form-input-wrap .form-input {
  padding-left: var(--space-10);
}

.form-input-wrap .input-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.form-input-wrap .input-toggle {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger);
  padding-left: var(--space-1);
  display: none;
}

.form-error.visible { display: block; }

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding-left: var(--space-1);
}

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:active { transform: scale(0.985); }

.card--glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

.card--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border: none;
}

.card__body { padding: var(--space-5); }
.card__header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card__footer {
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border-light);
}

/* ── Stat Cards ───────────────────────────────────────────── */
.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 80px; height: 80px;
  border-radius: 50%;
  opacity: 0.08;
  transform: translate(20px, -20px);
  transition: transform var(--transition-slow);
}

.stat-card:active { transform: scale(0.96); }
.stat-card:active::before { transform: translate(10px, -10px) scale(1.3); }

.stat-card--primary::before  { background: var(--color-primary); }
.stat-card--secondary::before{ background: var(--color-secondary); }
.stat-card--success::before  { background: var(--color-success); }
.stat-card--warning::before  { background: var(--color-warning); }
.stat-card--accent::before   { background: var(--color-accent); }

.stat-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-card--primary  .stat-card__icon { background: rgba(var(--color-primary-rgb), 0.12); color: var(--color-primary); }
.stat-card--secondary .stat-card__icon { background: rgba(var(--color-secondary-rgb), 0.12); color: var(--color-secondary); }
.stat-card--success  .stat-card__icon { background: rgba(0,196,140, 0.12); color: var(--color-success); }
.stat-card--warning  .stat-card__icon { background: rgba(255,176,32, 0.12); color: var(--color-warning); }
.stat-card--accent   .stat-card__icon { background: rgba(var(--color-accent-rgb), 0.12); color: var(--color-accent); }
.stat-card--neutral  .stat-card__icon { background: var(--color-surface-2); color: var(--color-text-secondary); }

.stat-card__value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.stat-card__label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-card__subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ── Badge ────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: var(--font-bold);
  line-height: 1;
}

.badge--primary  { background: var(--color-primary); color: #fff; }
.badge--danger   { background: var(--color-danger);  color: #fff; }
.badge--success  { background: var(--color-success); color: #fff; }
.badge--warning  { background: var(--color-warning); color: #fff; }
.badge--neutral  { background: var(--color-surface-2); color: var(--color-text-secondary); }

/* ── Avatar ───────────────────────────────────────────────── */
.avatar {
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-surface-2);
}

.avatar--sm  { width: 32px;  height: 32px; }
.avatar--md  { width: 44px;  height: 44px; }
.avatar--lg  { width: 64px;  height: 64px; }
.avatar--xl  { width: 88px;  height: 88px; }
.avatar--2xl { width: 110px; height: 110px; }

.avatar-placeholder {
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  font-weight: var(--font-bold);
  flex-shrink: 0;
}

/* ── List Items ───────────────────────────────────────────── */
.list-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  cursor: pointer;
  transition: background var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.list-item:active { background: var(--color-surface-2); }

.list-item__icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
}

.list-item__icon--primary { background: rgba(var(--color-primary-rgb), 0.1); color: var(--color-primary); }

.list-item__content { flex: 1; min-width: 0; }
.list-item__title {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}
.list-item__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: 2px;
}
.list-item__right {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* ── Toggle Switch ────────────────────────────────────────── */
.toggle {
  position: relative;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }

.toggle__track {
  position: absolute;
  inset: 0;
  background: var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.toggle__thumb {
  position: absolute;
  top: 3px; left: 3px;
  width: 20px; height: 20px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition-fast);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  pointer-events: none;
}

.toggle input:checked ~ .toggle__track { background: var(--color-primary); }
.toggle input:checked ~ .toggle__thumb { transform: translateX(22px); }

/* ── Notification Item ────────────────────────────────────── */
.notif-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  transition: background var(--transition-fast);
  border-bottom: 1px solid var(--color-border-light);
}

.notif-item:last-child { border-bottom: none; }
.notif-item:active { background: var(--color-surface-2); }
.notif-item.unread { background: rgba(var(--color-primary-rgb), 0.03); }

.notif-item__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
  margin-top: 6px;
  opacity: 0;
}
.notif-item.unread .notif-item__dot { opacity: 1; }

.notif-item__content { flex: 1; }
.notif-item__title {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
}
.notif-item__body {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: 3px;
  line-height: var(--leading-relaxed);
}
.notif-item__time {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ── Progress Bar ─────────────────────────────────────────── */
.progress {
  height: 6px;
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Chip / Tag ───────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
}

.chip--primary { background: rgba(var(--color-primary-rgb), 0.1); color: var(--color-primary); }
.chip--success { background: rgba(0,196,140, 0.1); color: var(--color-success); }
.chip--warning { background: rgba(255,176,32, 0.1); color: var(--color-warning); }
.chip--danger  { background: rgba(255,77,79, 0.1);  color: var(--color-danger); }

/* ── Icon Button ──────────────────────────────────────────── */
.icon-btn {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all var(--transition-fast);
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  position: relative;
}

.icon-btn:hover  { background: var(--color-surface-2); }
.icon-btn:active { transform: scale(0.92); }

/* ── Divider with Label ───────────────────────────────────── */
.divider-label {
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.divider-label::before,
.divider-label::after {
  content: ''; flex: 1;
  height: 1px; background: var(--color-border);
}

/* ── Skeleton Loader ──────────────────────────────────────── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-2) 25%,
    var(--color-border) 50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-wave 1.4s ease infinite;
  border-radius: var(--radius-md);
}

.skeleton--text  { height: 14px; border-radius: 4px; margin-bottom: 8px; }
.skeleton--title { height: 20px; border-radius: 4px; margin-bottom: 12px; width: 60%; }
.skeleton--card  { height: 100px; border-radius: var(--radius-xl); }
.skeleton--avatar{ border-radius: 50%; width: 44px; height: 44px; }

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

/* ── Alert ────────────────────────────────────────────────── */
.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  display: flex; align-items: flex-start; gap: var(--space-3);
  line-height: var(--leading-relaxed);
}

.alert--error   { background: rgba(255,77,79,0.08);   color: var(--color-danger);  border: 1px solid rgba(255,77,79,0.20); }
.alert--success { background: rgba(0,196,140,0.08);   color: var(--color-success); border: 1px solid rgba(0,196,140,0.20); }
.alert--warning { background: rgba(255,176,32,0.08);  color: var(--color-warning); border: 1px solid rgba(255,176,32,0.20); }
.alert--info    { background: rgba(24,144,255,0.08);  color: var(--color-info);    border: 1px solid rgba(24,144,255,0.20); }