:root {
  --border: #333;
  --border-light: #ccc;
  --bg: #f4f5f7;
  --panel: #ffffff;
  --accent: #1a5fb4;
  --accent-hover: #164a8e;
  --text: #1c1c1c;
  --muted: #666;
  --font-cjk: "DFKai-SB", "BiauKai", "標楷體", "KaiTi", "PMingLiU", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-cjk), -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px;
}

/* ---------- site banner ---------- */
.site-banner {
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  padding: 14px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.version-tag {
  font-size: 13px;
  font-weight: 600;
  opacity: 0.85;
  vertical-align: middle;
}

/* ---------- toolbar ---------- */
.toolbar {
  background: var(--panel);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 16px;
  position: sticky;
  top: 8px;
  z-index: 10;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-row + .toolbar-row {
  margin-top: 10px;
}

.app-title {
  font-size: 20px;
  margin: 0;
  font-weight: 700;
}

.company-input {
  font-size: 15px;
  font-weight: 600;
  padding: 6px 10px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  min-width: 260px;
}

.sheet-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-direction: column;
  margin-bottom: 16px;
  text-align: center;
}

.sheet-title .company-input {
  text-align: center;
  border: none;
  border-bottom: 1px dashed var(--border-light);
  border-radius: 0;
  font-size: 16px;
  min-width: 320px;
}

.sheet-title .app-title {
  font-size: 22px;
}

.toolbar-actions {
  justify-content: flex-start;
}

.law-url-row {
  justify-content: stretch;
}

.law-url-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  font-family: inherit;
  font-size: 14px;
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.spacer { flex: 1; }

.category-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.category-tab {
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--border-light);
  background: #eef1f6;
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
}

.category-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn {
  padding: 7px 14px;
  border-radius: 6px;
  border: 1px solid var(--border-light);
  background: #eef1f6;
  cursor: pointer;
  font-size: 14px;
}

.btn:hover { background: #dfe4ec; }

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

.btn-outline {
  background: #fff;
}

.btn-ghost {
  background: transparent;
  border-style: dashed;
}

.btn-danger {
  background: #fff;
  color: #b23b3b;
  border-color: #e0a3a3;
}
.btn-danger:hover {
  background: #fbeaea;
}

.link-btn {
  border: none;
  background: none;
  color: #b23b3b;
  cursor: pointer;
  font-size: 13px;
  text-decoration: underline;
}

/* ---------- sheet ---------- */
.sheet {
  background: var(--panel);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 20px;
}

.sheet-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}
.sheet-meta[hidden] { display: none; }

.meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.meta-row label {
  font-weight: 600;
  white-space: nowrap;
}

.meta-row input[type="text"],
.meta-row input[type="date"] {
  padding: 6px 10px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  font-family: inherit;
  min-width: 240px;
}

.empty-state {
  padding: 60px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- table ---------- */
.reg-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.reg-table th, .reg-table td {
  border: 1px solid var(--border);
  padding: 8px;
  vertical-align: top;
  font-size: 14px;
  word-break: break-word;
}

.reg-table thead th {
  background: #e8ecf3;
  text-align: center;
  font-weight: 700;
  vertical-align: middle;
}

.col-law { width: 12%; }
.col-article { width: 6%; }
.col-req { width: 34%; }
.col-status { width: 18%; }
.col-comp { width: 10%; }
.col-trend { width: 16%; }
.col-op { width: 60px; }

.reg-table td[contenteditable="true"] {
  outline: none;
  min-height: 24px;
  white-space: pre-wrap;
}
.reg-table td[contenteditable="true"]:focus {
  background: #fffbe6;
}

.cell-article, .cell-compliance-wrap {
  text-align: center;
}

.compliance-select {
  width: 100%;
  padding: 4px;
  border: 1px solid var(--border-light);
  border-radius: 4px;
  text-align: center;
  font-family: inherit;
  font-size: 14px;
}

.row-delete-btn {
  border: none;
  background: none;
  color: #b23b3b;
  cursor: pointer;
  font-size: 16px;
}
.row-delete-btn:hover { color: #7a2323; }

.sheet-footer {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text);
}

.footer-row {
  display: flex;
  gap: 24px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.footer-input {
  border: none;
  border-bottom: 1px dashed var(--border-light);
  font-family: inherit;
  font-size: 13px;
  padding: 2px 4px;
  min-width: 90px;
}
.form-no-input { min-width: 160px; }

.save-indicator {
  position: fixed;
  bottom: 16px;
  right: 16px;
  background: #2f9e44;
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.save-indicator.show { opacity: 0.92; }

.toast-stack {
  position: fixed;
  bottom: 16px;
  left: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
}

.toast {
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 13px;
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.25s, transform 0.25s;
  max-width: 360px;
}

.toast.show { opacity: 0.96; transform: translateY(0); }
.toast-info { background: #364152; }
.toast-success { background: #2f9e44; }
.toast-error { background: #c92a2a; }

.toast-action {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 420px;
}
.toast-action .toast-msg { flex: 1; }
.toast-action-btn {
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}
.toast-action-btn:hover { background: rgba(255,255,255,0.24); }

.print-only { display: none; }

/* ---------- help modal ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}
.modal-backdrop[hidden] { display: none; }

.modal {
  background: #fff;
  border-radius: 10px;
  max-width: 640px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  background: #fff;
}

.modal-header h2 {
  margin: 0;
  font-size: 18px;
}

.modal-close {
  border: none;
  background: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--muted);
  padding: 4px 8px;
}
.modal-close:hover { color: var(--text); }

.modal-body {
  padding: 20px;
}

.help-steps {
  margin: 0 0 16px;
  padding-left: 20px;
  line-height: 1.8;
  font-size: 14px;
}

.help-steps code {
  background: #f1f3f6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  word-break: break-all;
}

.help-image {
  width: 100%;
  border: 1px solid var(--border-light);
  border-radius: 6px;
}

.changelog-title {
  margin: 20px 0 8px;
  font-size: 14px;
  color: var(--muted);
}

.changelog-list {
  margin: 0;
  padding-left: 20px;
  line-height: 1.8;
  font-size: 13px;
  color: var(--text);
}

/* ---------- print ---------- */
@media print {
  .no-print { display: none !important; }
  .print-only { display: inline; }
  .compliance-select { display: none !important; }
  body { background: #fff; }
  .app { max-width: none; padding: 0; margin: 0; }
  .sheet {
    border: none;
    padding: 0;
    border-radius: 0;
  }
  .sheet-meta input,
  .company-input,
  .footer-input {
    border: none !important;
    background: transparent !important;
  }
  .reg-table th, .reg-table td {
    font-size: 11px;
    padding: 5px;
  }
  .reg-table td[contenteditable="true"]:focus { background: transparent; }
  @page {
    size: A4 landscape;
    margin: 10mm;
  }
}