/* ============================================================
   components.css — Premium Component Library
   Built on design tokens from design-system.css
   ============================================================ */

/* ————————————————————————————————————————————————————————————
   KEYFRAME ANIMATIONS
   ———————————————————————————————————————————————————————————— */

@keyframes spin {
  to { transform: rotate(360deg); }
}

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


/* ════════════════════════════════════════════════════════════
   1. BUTTONS  (.btn)
   ════════════════════════════════════════════════════════════ */

.btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: inherit;
  font-size: var(--font-size-sm);
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-decoration: none;
  line-height: 1.4;
  -webkit-user-select: none;
  user-select: none;
}

/* Primary */
.btn--primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-hover));
  color: var(--text-inverse);
}
.btn--primary:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

/* Secondary (outline) */
.btn--secondary {
  background: transparent;
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
}
.btn--secondary:hover {
  background: var(--accent-primary);
  color: var(--text-inverse);
}

/* Danger */
.btn--danger {
  background: var(--danger);
  color: #fff;
}
.btn--danger:hover {
  filter: brightness(1.1);
}

/* Ghost */
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn--ghost:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

/* Sizes */
.btn--sm {
  padding: 6px 12px;
  font-size: var(--font-size-xs);
}
.btn--lg {
  padding: 14px 28px;
  font-size: var(--font-size-base);
}
.btn--full {
  width: 100%;
}

/* Loading state */
.btn--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}
.btn--loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin-top: -8px;
  margin-left: -8px;
  border: 2px solid transparent;
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Icon-only button */
.btn--icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-full);
}


/* ════════════════════════════════════════════════════════════
   2. GLASS CARD  (.glass-card)
   ════════════════════════════════════════════════════════════ */

.glass-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  overflow: hidden;
}
.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.glass-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--accent-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.glass-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.glass-card__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.glass-card__badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
}

.glass-card__footer {
  border-top: 1px solid var(--border);
  padding-top: var(--space-4);
  margin-top: var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.glass-card__actions {
  display: flex;
  gap: var(--space-2);
}


/* ════════════════════════════════════════════════════════════
   3. FORMS  (.form-*)
   ════════════════════════════════════════════════════════════ */

.form-container {
  max-width: 480px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-input {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: all var(--transition-normal);
  outline: none;
  width: 100%;
  box-sizing: border-box;
}
.form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}
.form-input::placeholder {
  color: var(--text-tertiary);
}

.form-input--error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-light);
}

/* Select */
.form-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  padding-right: 40px;
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: all var(--transition-normal);
  outline: none;
  width: 100%;
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M2.22 4.47a.75.75 0 0 1 1.06 0L6 7.19l2.72-2.72a.75.75 0 1 1 1.06 1.06L6.53 8.78a.75.75 0 0 1-1.06 0L2.22 5.53a.75.75 0 0 1 0-1.06z'/%3E%3C/svg%3E");
  background-position: right 12px center;
  background-repeat: no-repeat;
  background-size: 12px;
}
.form-select:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

/* Error text */
.form-error {
  font-size: var(--font-size-xs);
  color: var(--danger);
  margin-top: var(--space-1);
}

/* Custom checkbox */
.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  -webkit-user-select: none;
  user-select: none;
}
.form-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.form-checkbox__mark {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  transition: all var(--transition-fast);
}
.form-checkbox__mark::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 6px;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.form-checkbox input[type="checkbox"]:checked ~ .form-checkbox__mark {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}
.form-checkbox input[type="checkbox"]:checked ~ .form-checkbox__mark::after {
  opacity: 1;
}
.form-checkbox input[type="checkbox"]:focus-visible ~ .form-checkbox__mark {
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}


/* ════════════════════════════════════════════════════════════
   4. NAVBAR  (.navbar)
   ════════════════════════════════════════════════════════════ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.navbar__logo {
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--accent-primary);
  letter-spacing: -0.5px;
  text-decoration: none;
}

.navbar__links {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

.navbar__link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: var(--space-2) 0;
}
.navbar__link:hover {
  color: var(--text-primary);
}
.navbar__link--active {
  color: var(--text-primary);
}
.navbar__link--active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px;
}

.navbar__user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  position: relative;
}

.navbar__avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--accent-primary);
  color: var(--text-inverse);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
}

.navbar__dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  min-width: 200px;
  z-index: 1001;
  display: none;
  overflow: hidden;
}
.navbar__dropdown--active {
  display: block;
}

.navbar__dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  text-decoration: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.navbar__dropdown-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}


/* ════════════════════════════════════════════════════════════
   5. SIDEBAR  (.sidebar)
   ════════════════════════════════════════════════════════════ */

.sidebar {
  position: fixed;
  left: 0;
  top: var(--navbar-height);
  width: var(--sidebar-width);
  height: calc(100vh - var(--navbar-height));
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  transition: width var(--transition-normal);
  z-index: 999;
  display: flex;
  flex-direction: column;
}

/* Collapsed */
.sidebar--collapsed {
  width: var(--sidebar-collapsed);
}
.sidebar--collapsed .sidebar__label,
.sidebar--collapsed .sidebar__title {
  display: none;
}

/* Hidden (mobile) */
.sidebar--hidden {
  transform: translateX(-100%);
}

.sidebar__section {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.sidebar__title {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
  padding: 0 var(--space-4);
}

.sidebar__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  position: relative;
  text-decoration: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  font-size: inherit;
}
.sidebar__item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar__item--active {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  border-left: 3px solid var(--accent-primary);
}

.sidebar__item--completed {
  opacity: 0.8;
}
.sidebar__item--completed .sidebar__check {
  display: inline-flex;
}

.sidebar__item--locked {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.sidebar__icon {
  width: 20px;
  height: 20px;
  color: inherit;
  flex-shrink: 0;
}

.sidebar__label {
  font-size: var(--font-size-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__check {
  color: var(--success);
  display: none;
  margin-left: auto;
}

.sidebar__progress {
  height: 3px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  margin-top: var(--space-2);
  overflow: hidden;
}
.sidebar__progress span {
  display: block;
  height: 100%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}


/* ════════════════════════════════════════════════════════════
   6. MODAL  (.modal-*)
   ════════════════════════════════════════════════════════════ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}
.modal-overlay--active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  max-width: 500px;
  width: 90%;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}
.modal-overlay--active .modal-content {
  transform: scale(1);
}

.modal__header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.modal__close {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-size: 18px;
}
.modal__close:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.modal__body {
  padding: var(--space-6);
}

.modal__footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}


/* ════════════════════════════════════════════════════════════
   7. TOAST  (.toast-*)
   ════════════════════════════════════════════════════════════ */

.toast-container {
  position: fixed;
  top: calc(var(--space-8) + var(--navbar-height));
  right: var(--space-8);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 320px;
  max-width: 420px;
  transform: translateX(120%);
  transition: transform 0.3s ease;
  background: var(--bg-secondary);
  pointer-events: auto;
}
.toast--visible {
  transform: translateX(0);
}

.toast--success {
  border-left: 4px solid var(--success);
  background: var(--success-light);
}
.toast--error {
  border-left: 4px solid var(--danger);
  background: var(--danger-light);
}
.toast--warning {
  border-left: 4px solid var(--warning);
  background: var(--warning-light);
}
.toast--info {
  border-left: 4px solid var(--info);
  background: var(--info-light);
}

.toast__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.toast__message {
  font-size: var(--font-size-sm);
  flex: 1;
  color: var(--text-primary);
}

.toast__close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--space-1);
  font-size: 18px;
  line-height: 1;
  transition: color var(--transition-fast);
}
.toast__close:hover {
  color: var(--text-primary);
}


/* ════════════════════════════════════════════════════════════
   8. PROGRESS RING  (.progress-ring)
   ════════════════════════════════════════════════════════════ */

.progress-ring {
  position: relative;
  display: inline-flex;
}

.progress-ring__circle--bg {
  stroke: var(--border);
  fill: none;
}

.progress-ring__circle--fill {
  stroke: var(--accent-primary);
  fill: none;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.5s ease;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
}

.progress-ring__text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-weight: 700;
  color: var(--text-primary);
  font-size: var(--font-size-lg);
}


/* ════════════════════════════════════════════════════════════
   9. BADGE  (.badge)
   ════════════════════════════════════════════════════════════ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  line-height: 1;
}

.badge--success {
  background: var(--success-light);
  color: var(--success);
}
.badge--warning {
  background: var(--warning-light);
  color: var(--warning);
}
.badge--danger {
  background: var(--danger-light);
  color: var(--danger);
}
.badge--info {
  background: var(--info-light);
  color: var(--info);
}
.badge--neutral {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}


/* ════════════════════════════════════════════════════════════
   10. DATA TABLE  (.data-table)
   ════════════════════════════════════════════════════════════ */

.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.data-table th {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  position: sticky;
  top: 0;
}
.data-table th:first-child {
  border-radius: var(--radius-md) 0 0 0;
}
.data-table th:last-child {
  border-radius: 0 var(--radius-md) 0 0;
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.data-table tr:hover td {
  background: var(--bg-card-hover);
}


/* ════════════════════════════════════════════════════════════
   11. TABS  (.tabs)
   ════════════════════════════════════════════════════════════ */

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  gap: var(--space-1);
}

.tabs__tab {
  padding: 12px 20px;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  font-weight: 500;
  font-size: var(--font-size-sm);
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: inherit;
}
.tabs__tab:hover {
  color: var(--text-primary);
}
.tabs__tab--active {
  color: var(--text-primary);
  border-bottom-color: var(--accent-primary);
}


/* ════════════════════════════════════════════════════════════
   12. LOADING STATES  (.loading-*)
   ════════════════════════════════════════════════════════════ */

.loading-spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent-primary);
  animation: spin 0.8s linear infinite;
}

.loading-skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-card-hover) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-md);
  animation: shimmer 1.5s infinite;
}


/* ════════════════════════════════════════════════════════════
   13. TOOLTIP  (.tooltip)
   ════════════════════════════════════════════════════════════ */

.tooltip {
  position: relative;
}
.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 9999;
}
.tooltip:hover::after {
  opacity: 1;
}