/* 主题变量与 JSON 工具保持一致，站内工具视觉统一 */
:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --topbar-h: 56px;

  --bg: #f8f7fa;
  --card: #fff;
  --text: #6f6b7d;
  --heading: #5d596c;
  --muted: #a5a3ae;
  --border: #dbdade;
  --field: #fff;
  --field-readonly: #f8f7fa;
  --hover: rgba(75, 70, 92, 0.06);
  --primary: #7367f0;
  --primary-hover: #675dd8;
  --primary-soft: rgba(115, 103, 240, 0.12);
  --success: #28c76f;
  --danger: #ea5455;
  --danger-soft: rgba(234, 84, 85, 0.1);
  --warning: #c77700;
  --warning-soft: rgba(255, 159, 67, 0.16);
  --tooltip: #2f2b3d;
  --shadow: 0 0.25rem 1.125rem rgba(75, 70, 92, 0.1);

  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #141414;
  --card: #1d1d1d;
  --text: #c9c9c9;
  --heading: #ececec;
  --muted: #8a8a8a;
  --border: #303030;
  --field: #141414;
  --field-readonly: #191919;
  --hover: rgba(255, 255, 255, 0.06);
  --primary: #1f58d6;
  --primary-hover: #3a72e6;
  --primary-soft: rgba(31, 88, 214, 0.22);
  --success: #52c41a;
  --danger: #e04f4f;
  --danger-soft: rgba(224, 79, 79, 0.14);
  --warning: #f0a020;
  --warning-soft: rgba(240, 160, 32, 0.14);
  --tooltip: #303030;
  --shadow: none;

  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  font: 15px/1.5 var(--font);
  color: var(--text);
  background: var(--bg);
}

button,
input,
select,
textarea {
  font: inherit;
}

[hidden] {
  display: none !important;
}

.icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  background: var(--card);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--heading);
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
}

.brand-logo {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.home-link {
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
}

.home-link:hover {
  background: var(--hover);
  color: var(--heading);
}

.icon-btn {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.icon-btn .icon {
  width: 20px;
  height: 20px;
}

.icon-btn:hover {
  background: var(--hover);
  color: var(--heading);
}

.theme-icon {
  display: none;
}

[data-theme-pref="system"] .theme-icon--system,
[data-theme-pref="light"] .theme-icon--light,
[data-theme-pref="dark"] .theme-icon--dark {
  display: block;
}

[data-tip]:hover::after,
[data-tip]:focus-visible::after {
  content: attr(data-tip);
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: var(--tooltip);
  color: #fff;
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 30;
}

/* ---------- 布局 ---------- */

.page {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2rem;
}

.card {
  background: var(--card);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: 1.25rem;
}

.tool {
  padding: 1.25rem 1.5rem 1.5rem;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  height: 38px;
  padding: 0 0.9rem;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.btn:focus-visible,
.tab:focus-visible,
.stamp:focus-visible,
.icon-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.45;
  cursor: default;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-outline {
  border-color: var(--border);
  color: var(--heading);
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-ghost {
  color: var(--primary);
}

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

.btn-danger {
  border-color: rgba(234, 84, 85, 0.4);
  color: var(--danger);
}

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

.btn-sm {
  height: 30px;
  padding: 0 0.6rem;
  font-size: 13px;
}

.btn.is-copied {
  border-color: var(--success);
  color: var(--success);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ---------- 当前时间戳 ---------- */

.status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  background: var(--primary-soft);
}

.status-label {
  margin-bottom: 0.25rem;
  color: var(--muted);
  font-size: 12px;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.stamp {
  padding: 0;
  border: 0;
  background: none;
  color: var(--primary);
  font: 600 28px/1.2 var(--mono);
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}

.stamp:hover {
  text-decoration: underline dotted;
  text-underline-offset: 6px;
}

.badge {
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: var(--card);
  color: var(--heading);
  font-size: 12px;
}

.badge-warn {
  background: var(--warning-soft);
  color: var(--warning);
}

/* ---------- 标签页 ---------- */

.tabs {
  display: flex;
  gap: 0.25rem;
  margin: 1.25rem 0 0.5rem;
  border-bottom: 1px solid var(--border);
}

.tab {
  margin-bottom: -1px;
  padding: 0.6rem 1rem;
  border: 0;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--text);
  font-size: 15px;
  cursor: pointer;
}

.tab:hover {
  color: var(--heading);
}

.tab[aria-selected="true"] {
  border-bottom-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

/* ---------- 表单 ---------- */

.block {
  padding: 1rem 0 0.25rem;
}

.block-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  color: var(--heading);
  font-size: 16px;
}

.block-title .icon {
  color: var(--primary);
}

.divider {
  height: 1px;
  margin: 1rem 0 0.25rem;
  background: var(--border);
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  align-items: start;
  gap: 1rem;
}

.grid + .grid {
  margin-top: 0.75rem;
}

.field {
  min-width: 0;
}

.span-2 {
  grid-column: 1 / 3;
}

.label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--heading);
  font-size: 13px;
  font-weight: 500;
}

.actions {
  display: flex;
  gap: 0.5rem;
  padding-top: calc(13px * 1.5 + 0.35rem);
}

.input,
.select {
  height: 38px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--field);
  color: var(--heading);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.input {
  width: 100%;
  padding: 0 0.75rem;
  font-family: var(--mono);
  font-size: 14px;
}

.input::placeholder {
  color: var(--muted);
  font-family: var(--font);
}

.input:focus,
.select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.input[readonly] {
  background: var(--field-readonly);
}

.input.is-invalid {
  border-color: var(--danger);
}

.select {
  padding: 0 0.5rem;
  font-size: 14px;
  cursor: pointer;
}

.select-block {
  width: 100%;
}

.unit-row {
  display: flex;
}

.unit-row .input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.unit-row .select {
  flex-shrink: 0;
  margin-left: -1px;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

/* ---------- 时区下拉框 ---------- */

.combo {
  position: relative;
}

.combo .input {
  padding-right: 2.25rem;
}

.combo-arrow {
  position: absolute;
  top: 10px;
  right: 0.7rem;
  width: 16px;
  height: 16px;
  color: var(--muted);
  pointer-events: none;
  transition: transform 0.15s;
}

.combo .input[aria-expanded="true"] ~ .combo-arrow {
  color: var(--primary);
  transform: rotate(180deg);
}

.combo-list {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 15;
  max-height: 288px;
  margin: 0;
  padding: 0.3rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  list-style: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  box-shadow: 0 0.25rem 1rem rgba(75, 70, 92, 0.16);
}

.combo-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.45rem 0.6rem;
  border-radius: 4px;
  color: var(--heading);
  font-size: 14px;
  cursor: pointer;
}

.combo-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.combo-offset {
  flex-shrink: 0;
  color: var(--muted);
  font: 12px var(--mono);
  font-variant-numeric: tabular-nums;
}

.combo-item:hover,
.combo-item.is-active {
  background: var(--hover);
}

.combo-item.is-selected {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 500;
}

.combo-item.is-selected:hover,
.combo-item.is-selected.is-active {
  box-shadow: inset 0 0 0 1px var(--primary);
}

.combo-item.is-selected .combo-offset {
  color: var(--primary);
}

.combo-empty {
  padding: 0.6rem;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.error,
.hint,
.meta {
  margin: 0.35rem 0 0;
  font-size: 12px;
}

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

.hint {
  color: var(--warning);
}

.hint button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--primary);
  font-size: 12px;
  text-decoration: underline;
  cursor: pointer;
}

.meta {
  color: var(--muted);
}

.meta:empty {
  display: none;
}

/* ---------- 批量 ---------- */

.textarea {
  height: 140px;
  padding: 0.6rem 0.75rem;
  resize: vertical;
  line-height: 1.6;
}

.batch-row {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  margin: 0.75rem 0 1rem;
}

.batch-row .field {
  width: 150px;
}

.batch-row .grow {
  flex: 1;
  width: auto;
}

.result {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background: var(--hover);
  color: var(--muted);
  font-size: 12px;
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.result-table th,
.result-table td {
  padding: 0.55rem 1rem;
  border-top: 1px solid var(--border);
  text-align: left;
}

.result-table th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.result-table td {
  color: var(--heading);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.result-table td.is-error {
  color: var(--danger);
  font-family: var(--font);
}

/* ---------- 说明文档 ---------- */

.doc {
  padding: 1.25rem 1.5rem;
}

.doc h2 {
  margin: 0 0 0.75rem;
  color: var(--heading);
  font-size: 1.15rem;
}

.doc h3 {
  margin: 1.5rem 0 0.5rem;
  color: var(--heading);
  font-size: 1rem;
}

.doc p {
  margin: 0.5rem 0;
}

.doc ul {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.doc li + li {
  margin-top: 0.25rem;
}

.doc code {
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: var(--hover);
  color: var(--danger);
  font: 13px var(--mono);
}

.code-table {
  width: 100%;
  border-collapse: collapse;
}

.code-table th,
.code-table td {
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--border);
  vertical-align: top;
}

.code-table th {
  width: 130px;
  padding-top: 0.9rem;
  color: var(--heading);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
}

.code-table pre {
  position: relative;
  margin: 0;
  padding: 0.6rem 3.5rem 0.6rem 0.75rem;
  overflow-x: auto;
  border-radius: 6px;
  background: var(--hover);
}

.code-table pre + pre {
  margin-top: 0.5rem;
}

.code-table pre code {
  padding: 0;
  background: none;
  color: var(--heading);
}

.code-copy {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--card);
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}

.code-table pre:hover .code-copy,
.code-copy:focus-visible {
  opacity: 1;
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  top: 1rem;
  left: 50%;
  z-index: 200;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  background: var(--tooltip);
  color: #fff;
  font-size: 14px;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translate(-50%, -150%);
  transition: transform 0.2s, opacity 0.2s;
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- 暗色：控制台风格，细边框 + 小圆角 ---------- */

[data-theme="dark"] .topbar {
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .card,
[data-theme="dark"] .status,
[data-theme="dark"] .result {
  border: 1px solid var(--border);
}

[data-theme="dark"] .status {
  background: var(--card);
}

[data-theme="dark"] .stamp {
  color: #4a8af0;
}

[data-theme="dark"] :is(.card, .status, .result, .btn, .input, .select, .textarea, .stamp, .brand-logo, .icon-btn, .code-table, .toast, .combo-list, .combo-item) {
  border-radius: 2px;
}

[data-theme="dark"] .combo-list {
  background: #1f1f1f;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .combo-item.is-selected,
[data-theme="dark"] .combo-item.is-selected .combo-offset {
  color: #6ea1f5;
}

[data-theme="dark"] .result-table th,
[data-theme="dark"] .code-table th {
  background: #262626;
}

/* ---------- 移动端 ---------- */

@media (max-width: 768px) {
  .topbar {
    padding: 0 1rem;
  }

  .page {
    padding: 0.75rem;
  }

  .tool,
  .doc {
    padding: 1rem;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .grid > [aria-hidden="true"] {
    display: none;
  }

  .span-2 {
    grid-column: auto;
  }

  .actions {
    padding-top: 0;
  }

  .actions .btn {
    flex: 1;
  }

  .batch-row {
    flex-wrap: wrap;
  }

  .batch-row .field,
  .batch-row .btn {
    width: 100%;
  }

  .stamp {
    font-size: 24px;
  }

  .code-table th {
    width: 90px;
  }
}