/* ============================================================
   todos.css — 待办提醒面板样式
   标签栏 / 工具栏 / 筛选栏 / 星级 / 分类标签 / 弹窗
   ============================================================ */

/* ---- Tab Bar ---- */
.todo-tab-bar {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
  background: var(--color-surface-hover);
  border-radius: var(--radius-md);
  padding: 3px;
  border: 1px solid var(--color-border);
}

.todo-tab-btn {
  flex: 1;
  padding: 8px 20px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.todo-tab-btn:hover {
  color: var(--color-text);
}

.todo-tab-active {
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 600;
  box-shadow: var(--color-card-shadow);
}

/* ---- Toolbar ---- */
.todo-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.todo-toolbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.todo-star-color-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.todo-star-color-picker {
  display: flex;
  align-items: center;
  gap: 4px;
}

.todo-star-color-swatch {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s ease;
  display: inline-block;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.todo-star-color-swatch:hover {
  transform: scale(1.2);
  border-color: var(--color-text-muted);
}

.todo-star-color-swatch.active {
  border-color: var(--color-text);
  transform: scale(1.15);
  box-shadow: 0 0 0 2px var(--color-primary-bg);
}

.todo-star-custom-input {
  width: 22px;
  height: 22px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  background: transparent;
  flex-shrink: 0;
}

.todo-star-custom-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.todo-star-custom-input::-webkit-color-swatch {
  border-radius: 50%;
  border: none;
}

/* ---- Filter Bar ---- */
.todo-filter-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.todo-filter-btn {
  padding: 5px 14px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.todo-filter-btn:hover { color: var(--color-text); }

.todo-filter-active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.todo-filter-count {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  border-radius: 10px;
  padding: 0 6px;
  font-size: 0.72rem;
  margin-left: 2px;
}

.todo-filter-active .todo-filter-count {
  background: rgba(255,255,255,0.3);
}

/* ---- Todo List ---- */
.todo-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.todo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.todo-item:hover {
  border-color: var(--color-primary-border);
  box-shadow: var(--color-card-shadow);
}

.todo-item-done {
  opacity: 0.55;
}

.todo-item-done .todo-item-title {
  text-decoration: line-through;
}

.todo-item-exam {
  border-left: 3px solid var(--color-danger);
  background: var(--color-danger-bg);
}

/* ---- Checkbox ---- */
.todo-checkbox {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border: none;
  background: transparent;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}

.todo-checkbox:hover { transform: scale(1.15); }

/* ---- Content ---- */
.todo-item-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.todo-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.todo-item-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-word;
}

.todo-item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* ---- Stars ---- */
.todo-stars {
  flex-shrink: 0;
  font-size: 0.78rem;
  letter-spacing: 1px;
  color: #f59e0b;
}

/* ---- Category Badge ---- */
.todo-cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 1px 8px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 500;
  white-space: nowrap;
}

.todo-cat-todo       { background: var(--color-primary-bg); color: var(--color-primary); }
.todo-cat-countdown  { background: var(--color-info-bg); color: var(--color-info); }
.todo-cat-homework   { background: var(--color-warning-bg); color: var(--color-warning); }
.todo-cat-custom     { background: var(--color-accent-violet-bg); color: var(--color-accent-violet); }

/* ---- Countdown ---- */
.todo-countdown {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-info);
}

.todo-countdown-urgent {
  color: var(--color-danger);
  font-weight: 600;
}

/* ---- Date ---- */
.todo-date {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.todo-date-overdue {
  color: var(--color-danger);
  font-weight: 500;
}

/* ---- Exam Badge ---- */
.todo-exam-badge {
  display: inline-block;
  background: var(--color-danger-bg);
  color: var(--color-danger);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.72rem;
  margin-right: 4px;
}

.todo-exam-countdown {
  font-size: 0.78rem;
  color: var(--color-warning);
  font-weight: 500;
}

.todo-exam-countdown-urgent {
  color: var(--color-danger);
  font-weight: 600;
}

/* ---- Delete Button ---- */
.todo-delete-btn {
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.todo-item:hover .todo-delete-btn,
.todo-item:focus-within .todo-delete-btn {
  opacity: 1;
}

@media (max-width: 767px) {
  .todo-delete-btn { opacity: 1; }
}

/* ---- Empty State ---- */
.todo-empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-muted);
}

.todo-empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* ---- Footer ---- */
.todo-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  margin-top: 12px;
  border-top: 1px solid var(--color-border);
}

.todo-footer-stats {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ---- Category Selector (in modal) ---- */
.todo-cat-selector {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.todo-cat-btn {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.todo-cat-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.todo-cat-btn-active {
  background: var(--color-primary-bg);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}

/* ---- Stars Selector (in modal) ---- */
.todo-stars-selector {
  display: flex;
  gap: 2px;
}

.todo-star-btn {
  font-size: 1.8rem;
  cursor: pointer;
  transition: transform var(--transition);
  user-select: none;
}

.todo-star-btn:hover {
  transform: scale(1.2);
}

/* Dark mode adjustments */
[data-theme="dark"] .todo-cat-btn { background: var(--color-bg); }
[data-theme="dark"] .todo-cat-btn-active { background: var(--color-primary-bg); }

/* ---- Timer Placeholder ---- */
.todo-timer-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  text-align: center;
  background: var(--color-surface);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 300px;
}

.todo-timer-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.5;
  animation: timerPulse 2s ease-in-out infinite;
}

@keyframes timerPulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.05); }
}

.todo-timer-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.todo-timer-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.todo-timer-desc-sub {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 767px) {
  .todo-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .todo-toolbar-left {
    justify-content: center;
  }

  .todo-tab-btn {
    padding: 7px 14px;
    font-size: 0.85rem;
  }

  .todo-star-color-label {
    font-size: 0.7rem;
  }

  .todo-star-color-swatch {
    width: 18px;
    height: 18px;
  }

  .todo-timer-placeholder {
    padding: 60px 16px;
    min-height: 240px;
  }

  .todo-timer-icon {
    font-size: 3rem;
  }

  .todo-stars {
    font-size: 0.72rem;
  }
}