:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #e2e5ea;
  --color-text: #1f2430;
  --color-text-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-success: #16a34a;
  --color-success-bg: #dcfce7;
  --color-warning: #d97706;
  --color-warning-bg: #fef3c7;
  --color-danger: #dc2626;
  --color-danger-bg: #fee2e2;
  --color-muted-bg: #eef0f3;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.08);
  --font-display: "Space Grotesk", "Noto Sans TC", system-ui, sans-serif;
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans TC", "Segoe UI", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

[x-cloak] { display: none !important; }

.app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

/* ───────── Preview banner (full.html → 進階版預覽) ───────── */
.preview-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: #1f2430;
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  margin-bottom: 16px;
}
.preview-banner a { color: #93c5fd; font-weight: 500; }

/* ───────── Header ───────── */
.site-header {
  margin-bottom: 20px;
}
.site-header h1 {
  font-size: 1.65rem;
  margin: 0 0 4px;
}
.site-header .subtitle {
  color: var(--color-text-muted);
  margin: 0 0 14px;
  font-size: 0.95rem;
}
.header-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ───────── Buttons ───────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--color-muted-bg); }
.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-danger { color: var(--color-danger); border-color: var(--color-danger-bg); }
.btn-danger:hover { background: var(--color-danger-bg); }
.btn-sm { padding: 4px 10px; font-size: 0.78rem; }

/* ───────── Summary / Progress ───────── */
.summary-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
.summary-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}
.summary-percent {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
}
.summary-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.summary-stats strong { color: var(--color-text); }
.stat-issue strong { color: var(--color-danger); }

.progress-bar {
  width: 100%;
  height: 10px;
  background: var(--color-muted-bg);
  border-radius: 999px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), #60a5fa);
  border-radius: 999px;
  transition: width 0.25s ease;
}
.progress-bar.sm { height: 6px; margin-top: 6px; }

/* ───────── Filters ───────── */
.filter-bar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.filter-row .filter-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  width: 72px;
  flex-shrink: 0;
}
.search-input {
  flex: 1;
  min-width: 180px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}
.search-input:focus { outline: 2px solid var(--color-primary); outline-offset: -1px; }

.chip {
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all 0.12s;
  white-space: nowrap;
}
.chip:hover { border-color: var(--color-primary); color: var(--color-text); }
.chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.quick-filters { display: flex; gap: 8px; flex-wrap: wrap; }

/* ───────── Category ───────── */
.category {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  user-select: none;
}
.category-header:hover { background: var(--color-muted-bg); }
.category-title {
  font-size: 1.05rem;
  font-weight: 600;
  flex: 1;
}
.category-count {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.category-progress-mini {
  width: 100px;
}
.category-toggle-icon {
  width: 18px;
  text-align: center;
  color: var(--color-text-muted);
  transition: transform 0.15s;
}
.category-toggle-icon.open { transform: rotate(90deg); }
.category-body { padding: 4px 18px 16px; }
.category-actions {
  display: flex;
  gap: 6px;
  padding: 0 18px 12px;
  flex-wrap: wrap;
}

.group-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin: 14px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ───────── Item ───────── */
.item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 8px;
  background: var(--color-surface);
}
.item.is-issue { border-color: var(--color-danger); background: #fff8f8; }
.item.is-done { background: #f8fdf9; }
.item-top {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
}
.item-name {
  flex: 1;
  min-width: 220px;
  font-size: 0.92rem;
  font-weight: 500;
}
.badges {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}
.badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 500;
  white-space: nowrap;
}
.badge-tracking-client { background: #e0f2fe; color: #0369a1; }
.badge-tracking-server { background: #ede9fe; color: #6d28d9; }
.badge-tracking-both { background: #fae8ff; color: #a21caf; }
.badge-tracking-common { background: var(--color-muted-bg); color: var(--color-text-muted); }
.badge-platform { background: var(--color-muted-bg); color: var(--color-text-muted); }
.badge-priority-high { background: var(--color-danger-bg); color: var(--color-danger); }
.badge-priority-medium { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-priority-low { background: var(--color-muted-bg); color: var(--color-text-muted); }

.status-control {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.status-btn {
  padding: 4px 10px;
  font-size: 0.76rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
}
.status-btn:hover { border-color: var(--color-primary); }
.status-btn.active-not_started { background: var(--color-muted-bg); color: var(--color-text); border-color: var(--color-muted-bg); }
.status-btn.active-in_progress { background: #dbeafe; color: #1d4ed8; border-color: #dbeafe; }
.status-btn.active-done { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success-bg); }
.status-btn.active-issue { background: var(--color-danger-bg); color: var(--color-danger); border-color: var(--color-danger-bg); }
.status-btn.active-not_applicable { background: var(--color-muted-bg); color: var(--color-text-muted); border-color: var(--color-muted-bg); text-decoration: line-through; }

.item-toggle-detail {
  font-size: 0.78rem;
  color: var(--color-primary);
  cursor: pointer;
  margin-top: 6px;
  display: inline-block;
}
.item-detail {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--color-border);
  font-size: 0.85rem;
}
.item-detail dt {
  font-size: 0.74rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}
.item-detail dt:first-child { margin-top: 0; }
.item-detail dd { margin: 2px 0 0; }
.item-detail dd a { word-break: break-all; }

.user-note-input {
  width: 100%;
  margin-top: 8px;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: inherit;
  resize: vertical;
  min-height: 32px;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
}

/* ───────── Footer ───────── */
.site-footer {
  margin-top: 32px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ───────── Modal (export/import) ───────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}
.modal-box {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  max-width: 560px;
  width: 100%;
  max-height: 80vh;
  overflow: auto;
  box-shadow: var(--shadow-md);
}
.modal-box h3 { margin-top: 0; }
.modal-box textarea {
  width: 100%;
  min-height: 160px;
  font-family: monospace;
  font-size: 0.78rem;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

/* ───────── Responsive ───────── */
@media (max-width: 640px) {
  .app { padding: 16px 12px 60px; }
  .filter-row .filter-label { width: auto; }
  .item-name { min-width: 100%; }
  .category-progress-mini { display: none; }
}

/* ───────── Print ───────── */
@media print {
  body { background: #fff; }
  .filter-bar, .header-actions, .category-actions, .item-toggle-detail,
  .status-control, .btn, .modal-overlay { display: none !important; }
  .category { box-shadow: none; border: 1px solid #ccc; break-inside: avoid; }
  .item { break-inside: avoid; border: 1px solid #ccc; }
  .category-body { display: block !important; }
  .item.is-issue::after { content: " ⚠ 待修"; color: #b91c1c; font-weight: 600; }
  .item.is-done::after { content: " ✓ 已驗證"; color: #15803d; font-weight: 600; }
}