*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --surface: #f1f5f9;
  --bg: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --success: #16a34a;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--surface);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

#app {
  max-width: 680px;
  margin: 0 auto;
  padding: 16px;
}

/* Header */
.header {
  text-align: center;
  padding: 20px 0 24px;
}

.header h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Progress */
.progress-container {
  margin-top: 14px;
}

.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.3s ease, background-color 0.3s ease;
  min-width: 0;
}

.progress-fill.complete {
  background: var(--success);
}

.progress-text {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--text-secondary);
}

.progress-text.complete {
  color: var(--success);
  font-weight: 600;
}

/* Templates */
.templates-section {
  margin-bottom: 24px;
}

.templates-section h2 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 2px;
}

.section-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}

.template-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
  user-select: none;
}

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

.template-card:active {
  transform: scale(0.98);
}

.template-name {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 2px;
}

.template-count {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Add Item */
.add-item-section {
  margin-bottom: 16px;
}

.add-item-form {
  display: flex;
  gap: 8px;
}

.add-item-form input[type="text"] {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
  background: var(--bg);
}

.add-item-form input[type="text"]:focus {
  border-color: var(--primary);
}

.add-item-form select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--bg);
  outline: none;
  cursor: pointer;
}

.add-item-form select:focus {
  border-color: var(--primary);
}

/* Buttons */
.btn {
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}

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

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

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

.btn-secondary:hover {
  background: #cbd5e1;
}

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

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

/* Actions */
.actions-section {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* Items */
.empty-state {
  text-align: center;
  padding: 48px 16px;
}

.empty-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.empty-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Category Group */
.category-group {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 16px;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
  border-radius: var(--radius);
}

.category-header:hover {
  background: var(--surface);
}

.category-title {
  font-weight: 600;
  font-size: 14px;
}

.category-count {
  font-size: 13px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.category-items {
  border-top: 1px solid var(--border);
}

.category-items.collapsed {
  display: none;
}

/* Item Row */
.item-row {
  display: flex;
  align-items: center;
  padding: 9px 16px;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

.item-row:last-child {
  border-bottom: none;
}

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

.item-row.packed {
  background: #f0fdf4;
}

.item-row.packed:hover {
  background: #dcfce7;
}

.item-row.later {
  background: #fffbeb;
}

.item-row.later:hover {
  background: #fef3c7;
}

.item-row.later .item-name {
  color: var(--text-secondary);
  font-style: italic;
}

.item-checkbox {
  width: 18px;
  height: 18px;
  min-width: 18px;
  margin-right: 12px;
  cursor: pointer;
  accent-color: var(--success);
}

.item-name {
  flex: 1;
  font-size: 14px;
  transition: color 0.15s;
}

.item-row.packed .item-name {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.item-later-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  margin-right: 4px;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  line-height: 1.4;
  white-space: nowrap;
}

.item-later-toggle:hover {
  color: #b45309;
  background: #fffbeb;
  border-color: #fbbf24;
}

.item-later-toggle.active {
  color: #b45309;
  background: #fef3c7;
  border-color: #fbbf24;
}

.item-later-toggle.active:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}

.item-delete {
  background: none;
  border: none;
  color: #cbd5e1;
  cursor: pointer;
  font-size: 20px;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
  line-height: 1;
}

.item-delete:hover {
  color: var(--danger);
  background: #fef2f2;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  opacity: 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
  z-index: 1000;
  pointer-events: none;
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive */
@media (max-width: 500px) {
  .add-item-form {
    flex-wrap: wrap;
  }

  .add-item-form input[type="text"] {
    width: 100%;
  }

  .add-item-form select,
  .add-item-form .btn {
    flex: 1;
  }

  .template-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .actions-section .btn {
    flex: 1;
    text-align: center;
  }
}