/* Cards */
.card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 20px;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: var(--surface-hover);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  box-shadow: 0 4px 10px rgba(74, 222, 128, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 14px rgba(74, 222, 128, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

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

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

.btn-danger:hover {
  background: #DC2626;
}

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

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

.btn-icon {
  padding: 10px;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.badge-streak {
  background: linear-gradient(135deg, #10B981, #059669);
  color: white;
}

.badge-coins {
  background: linear-gradient(135deg, var(--radiant-gold), var(--accent-warm));
  color: white;
}

.badge-immortal {
  background: var(--immortal-purple);
  color: white;
  box-shadow: 0 0 10px var(--immortal-glow);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--surface);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 90%;
  overflow: hidden;
  animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Inputs */
.input, .select, .textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font-family);
  transition: all var(--transition-fast);
}

.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.2);
}

.textarea {
  resize: vertical;
  min-height: 100px;
}

/* Checkbox */
.checkbox {
  appearance: none;
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
}

.checkbox:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.checkbox:checked::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 8px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* Toggle */
.toggle {
  appearance: none;
  width: 48px;
  height: 24px;
  background: var(--bg-tertiary);
  border-radius: 12px;
  position: relative;
  cursor: pointer;
  outline: none;
  transition: all var(--transition-fast);
}

.toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.toggle:checked {
  background: var(--accent);
}

.toggle:checked::after {
  transform: translateX(24px);
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--bg-tertiary);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  border-radius: 999px;
  transition: width var(--transition-normal);
}

/* Progress Ring */
.progress-ring {
  transform: rotate(-90deg);
}

.progress-ring-circle {
  transition: stroke-dashoffset 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Chip */
.chip {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
  color: var(--text-tertiary);
}

/* Toast */
.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Tooltip */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip-text {
  visibility: hidden;
  width: max-content;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  text-align: center;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s;
  font-size: 0.75rem;
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* Avatar */
.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  border: 2px solid var(--surface);
  box-shadow: var(--shadow-sm);
}

/* Divider */
.divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

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

/* specific gamified components */
.coin-display {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--coin-gold);
  background: var(--surface);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px var(--coin-glow);
}

.streak-fire {
  display: flex;
  align-items: center;
  gap: 4px;
  color: #F97316;
  font-weight: 700;
}

.fab {
  position: fixed;
  bottom: 88px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  z-index: 100;
}

.fab:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 24px rgba(74, 222, 128, 0.4);
}

.fab:active {
  transform: translateY(0) scale(0.95);
}

.dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  z-index: 500;
  display: none;
}

.tab-bar {
  display: flex;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.tab-item {
  padding: 12px 16px;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.tab-item:hover {
  color: var(--text-primary);
}

.tab-item.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.search-bar {
  position: relative;
  width: 100%;
}

.search-bar input {
  padding-left: 40px;
}

.search-bar .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}

.list-item {
  display: flex;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-fast);
}

.list-item:hover {
  background: var(--surface-hover);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 1.25rem;
}