/* ============================================
   COMPONENTS — Buttons, Modal, Forms, Toast, etc.
   ============================================ */

/* ---- Button ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  height: 36px;
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: inherit;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn svg {
  width: 16px;
  height: 16px;
}

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

.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-sm);
}

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

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

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 0 var(--space-2);
}

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

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

.btn--danger:hover {
  background: var(--danger-light);
}

.btn--icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn--sm {
  height: 28px;
  padding: 0 var(--space-3);
  font-size: 0.75rem;
}

/* ---- Badge ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge--urgent {
  background: var(--danger-light);
  color: var(--danger);
}

.badge--high {
  background: var(--warning-light);
  color: var(--warning);
}

.badge--medium {
  background: var(--accent-light);
  color: var(--accent);
}

.badge--low {
  background: var(--bg-hover);
  color: var(--text-tertiary);
}

/* ---- Modal ---- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal-backdrop.is-active {
  display: flex;
}

.modal__content {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
  width: 90%;
  max-width: 640px;
  max-height: 85vh;
  overflow-y: auto;
  animation: scaleIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--space-6) var(--space-6) var(--space-4);
  position: sticky;
  top: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  z-index: 1;
  border-bottom: 1px solid var(--border-secondary);
}

.modal__header-left {
  flex: 1;
  min-width: 0;
}

.modal__task-id {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.modal__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
}

.modal__title-input {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  background: transparent;
  border: none;
  width: 100%;
  padding: 2px 0;
  font-family: inherit;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-fast);
}

.modal__title-input:focus {
  outline: none;
  border-bottom-color: var(--accent);
}

.modal__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  margin-left: var(--space-3);
}

.modal__close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal__body {
  padding: var(--space-5) var(--space-6);
}

.modal__section {
  margin-bottom: var(--space-6);
}

.modal__section:last-child {
  margin-bottom: 0;
}

.modal__section-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

/* ---- Modal Fields Grid ---- */
.modal__fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.modal__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.modal__field-label {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.modal__field-value {
  font-size: 0.8125rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ---- Description ---- */
.modal__description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  white-space: pre-wrap;
}

.modal__description-empty {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  font-style: italic;
}

/* ---- Comments ---- */
.comment {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
}

.comment + .comment {
  border-top: 1px solid var(--border-secondary);
}

.comment__avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 600;
  color: white;
  flex-shrink: 0;
}

.comment__content {
  flex: 1;
  min-width: 0;
}

.comment__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.comment__author {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
}

.comment__time {
  font-size: 0.6875rem;
  color: var(--text-tertiary);
}

.comment__source {
  font-size: 0.625rem;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: var(--accent-muted);
  color: var(--accent);
  font-weight: 500;
}

.comment__body {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ---- Comment Input ---- */
.comment-form {
  display: flex;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-secondary);
}

.comment-form__input {
  flex: 1;
  min-height: 36px;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-family: inherit;
  resize: none;
  transition: all var(--transition-fast);
}

.comment-form__input:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--surface-primary);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

/* ---- Form Elements ---- */
.input,
.select {
  height: 36px;
  padding: 0 var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.input:focus,
.select:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--surface-primary);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

.select {
  appearance: none;
  cursor: pointer;
  padding-right: var(--space-8);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B7194' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.textarea {
  width: 100%;
  min-height: 80px;
  padding: var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-family: inherit;
  resize: vertical;
  transition: all var(--transition-fast);
}

.textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--surface-primary);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

/* ---- Toast ---- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-2);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--surface-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.8125rem;
  color: var(--text-primary);
  animation: toastIn 0.35s var(--transition-spring);
  min-width: 280px;
  max-width: 420px;
}

.toast.is-leaving {
  animation: toastOut 0.25s ease forwards;
}

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

.toast--success .toast__icon { color: var(--success); }
.toast--error .toast__icon { color: var(--danger); }
.toast--warning .toast__icon { color: var(--warning); }

/* ---- Filter Chip ---- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chip:hover {
  background: var(--bg-hover);
  border-color: var(--border-primary);
}

.chip.is-active {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.chip svg {
  width: 14px;
  height: 14px;
}

/* ---- Avatar ---- */
.avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 600;
  color: white;
  flex-shrink: 0;
}

.avatar--sm {
  width: 20px;
  height: 20px;
  font-size: 0.5625rem;
}

.avatar--lg {
  width: 36px;
  height: 36px;
  font-size: 0.8125rem;
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  padding: 2px;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.theme-toggle__thumb {
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: transform var(--transition-spring);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle__thumb svg {
  width: 11px;
  height: 11px;
  color: white;
}

[data-theme="dark"] .theme-toggle__thumb {
  transform: translateX(20px);
}

/* ---- Dropdown Menu ---- */
.dropdown {
  position: relative;
}

.dropdown__menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 180px;
  background: var(--surface-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-1);
  z-index: var(--z-dropdown);
  animation: slideDown 0.15s ease;
}

.dropdown.is-open .dropdown__menu {
  display: block;
}

.dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.dropdown__item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.dropdown__item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.dropdown__divider {
  height: 1px;
  background: var(--border-secondary);
  margin: var(--space-1) 0;
}

/* ---- Activity Log (in modal) ---- */
.activity-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.activity-item__dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--border-primary);
  margin-top: 6px;
  flex-shrink: 0;
}

.activity-item__time {
  font-size: 0.6875rem;
  color: var(--text-tertiary);
  margin-left: auto;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ---- Stats Bar (dashboard mini) ---- */
.stats-bar {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.stat {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.stat__value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
  .modal__content {
    width: 100%;
    max-width: 100%;
    max-height: 100vh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    margin-top: auto;
  }

  .modal__fields {
    grid-template-columns: 1fr;
  }

  .toast-container {
    bottom: var(--space-4);
    right: var(--space-4);
    left: var(--space-4);
  }

  .toast {
    min-width: auto;
    max-width: 100%;
  }
}