:root {
  --ink: #543c7d;
  --ink-soft: #efeaf7;
  --text: #1d1b22;
  --muted: #6b6676;
  --line: #ddd8e6;
  --bg: #f6f4f9;
  --panel: #fff;
  --error: #b3261e;
  --ok: #1e6b3a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.app {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px;
}

.top {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.logo {
  width: 64px;
}

.brand {
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  margin-right: auto;
}

.brand small {
  display: block;
  color: var(--muted);
  font-weight: 400;
  font-size: 14px;
}

.tabs {
  display: flex;
  gap: 4px;
}

.tabs[hidden] {
  display: none;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: var(--ink);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
  font-weight: 700;
}

.tab.active {
  background: var(--ink-soft);
  border-color: var(--ink);
  color: var(--ink);
  font-weight: 700;
}

.tab.subtle {
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
}

.panel.narrow {
  max-width: 360px;
  margin: 48px auto;
  display: grid;
  gap: 12px;
}

h1 {
  margin: 0 0 12px;
  font-size: 22px;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

input[type="password"],
input[type="date"],
input[type="search"],
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  font-weight: 400;
}

textarea {
  resize: vertical;
  font-size: 18px;
  line-height: 1.6;
}

input:focus,
textarea:focus {
  outline: 2px solid var(--ink);
  outline-offset: 1px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 700px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0 4px;
}

.hint {
  color: var(--muted);
  font-size: 14px;
  margin: 6px 0 0;
}

.print-tip {
  font-size: 13px;
}

.error {
  color: var(--error);
  margin: 0;
}

.status {
  position: sticky;
  top: 8px;
  z-index: 5;
  margin: 0 0 12px;
  padding: 10px 14px;
  border-radius: 8px;
  background: #e8f3ec;
  color: var(--ok);
}

.status.error {
  background: #fbe9e8;
  color: var(--error);
}

.preview-title {
  font-size: 16px;
  color: var(--muted);
  margin: 24px 0 8px;
}

/* A4 sheets are 210mm wide; scroll sideways on small screens instead of squashing them. */
.preview {
  overflow-x: auto;
  padding-bottom: 8px;
}

.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.toolbar input[type="search"] {
  flex: 1;
  min-width: 200px;
}

label.check {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

th,
td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-weight: 700;
}

button.danger {
  color: var(--error);
}

button.danger:hover:not(:disabled) {
  border-color: var(--error);
}

.next-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

button.small {
  padding: 2px 10px;
  font-size: 13px;
}

.row-actions button {
  padding: 4px 10px;
  font-size: 14px;
}

.print-root {
  display: none;
}

@media print {
  body {
    background: #fff;
  }
  .no-print {
    display: none !important;
  }
  .print-root {
    display: block;
  }
  .sheet {
    margin: 0;
    box-shadow: none;
  }
}

.lifetime-check {
  margin-top: 10px;
}