:root {
  --bg: #f6f7f9;
  --bg-card: #ffffff;
  --fg: #1c2430;
  --fg-muted: #5b6673;
  --border: #dfe3e8;
  --accent: #2563eb;
  --accent-soft: #eaf1fe;
  --danger: #d33;
  --ok: #0a7d33;
  --warn: #b45309;
  --radius: 12px;
  --shadow: 0 1px 3px rgb(16 24 40 / 0.07), 0 1px 2px rgb(16 24 40 / 0.04);
}

[data-theme="dark"] {
  --bg: #10151c;
  --bg-card: #1a222c;
  --fg: #e7ecf2;
  --fg-muted: #9aa7b5;
  --border: #2b3644;
  --accent: #5b9bff;
  --accent-soft: #1d2a3d;
  --danger: #ff7b72;
  --ok: #56d364;
  --warn: #f0b429;
  --shadow: 0 1px 3px rgb(0 0 0 / 0.4);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* 全局滚动条与数字等宽 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; border: 2px solid var(--bg); }
::-webkit-scrollbar-track { background: transparent; }
html { scrollbar-color: var(--border) transparent; scrollbar-width: thin; }
.msg, #tsNow, .stat-box b, .kv code, .pw-display, .jwt-pre { font-variant-numeric: tabular-nums; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  transition: background 0.25s ease, color 0.25s ease;
}

::selection { background: var(--accent); color: #fff; }

kbd {
  background: var(--accent-soft); border: 1px solid var(--border);
  border-radius: 5px; padding: 1px 5px; font-size: 0.82em; font-family: inherit;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
code { background: var(--accent-soft); padding: 2px 6px; border-radius: 6px; font-size: 0.9em; }

/* 跳转链接（无障碍） */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: 8px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s ease;
}
.site-header.scrolled { box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; gap: 10px; padding: 10px 16px; row-gap: 6px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.05rem; color: var(--fg); text-decoration: none; white-space: nowrap; }

.tool-nav { display: flex; gap: 3px 2px; flex-wrap: wrap; flex: 1; align-items: center; }
.tool-btn {
  border: 1px solid transparent;
  background: transparent; color: var(--fg-muted);
  padding: 5px 10px; border-radius: 999px;
  cursor: pointer; font-size: 0.88rem; white-space: nowrap;
  min-height: 32px;
  transition: background 0.15s ease, color 0.15s ease;
}
.tool-btn:hover { color: var(--fg); background: var(--accent-soft); }
.tool-btn.active { background: var(--accent); color: #fff; box-shadow: 0 1px 4px rgb(37 99 235 / 0.35); }
.nav-sep { width: 1px; height: 20px; background: var(--border); margin: 0 5px; flex: none; }

#toolSearch {
  width: 120px; padding: 5px 10px; font-size: 0.85rem;
  border-radius: 999px; margin: 0; flex: none;
  transition: width 0.2s ease, border-color 0.15s ease;
}
#toolSearch:focus { width: 170px; }
.tool-btn.nav-hidden { display: none; }

.icon-btn {
  border: 1px solid var(--border); background: var(--bg-card);
  border-radius: 8px; padding: 5px 10px; cursor: pointer; font-size: 1rem;
  transition: transform 0.2s ease;
}
.icon-btn:hover { transform: rotate(15deg); }

/* ---------- 主体 ---------- */
main { padding: 24px 16px 48px; }
.tool-panel { display: none; }
.tool-panel.active { display: block; animation: fadeIn 0.25s ease; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
h2 { margin: 0 0 4px; font-size: 1.35rem; }
h3 { margin: 0 0 10px; font-size: 1rem; }
.hint { color: var(--fg-muted); font-size: 0.9rem; margin-top: 0; }

textarea, input[type="text"], input[type="datetime-local"], select {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); color: var(--fg);
  font: inherit; margin-bottom: 12px;
}
select { width: auto; margin-bottom: 0; }
textarea { resize: vertical; font-family: ui-monospace, Consolas, monospace; font-size: 0.92rem; }
textarea:focus, input:focus, select:focus, .btn:focus-visible, .tool-btn:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0; align-items: center; }
.btn {
  border: 1px solid var(--border); background: var(--bg-card); color: var(--fg);
  padding: 8px 16px; border-radius: 10px; cursor: pointer;
  font: inherit; font-size: 0.92rem; text-decoration: none; display: inline-block;
  transition: border-color 0.15s ease, color 0.15s ease, filter 0.15s ease, transform 0.05s ease;
}
.btn:active { transform: scale(0.97); }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); color: #fff; }
.btn.ghost { background: transparent; }
.btn.mini { padding: 3px 10px; font-size: 0.82rem; border-radius: 8px; }
.btn.copied { border-color: var(--ok); color: var(--ok); }

.msg { min-height: 1.5em; font-size: 0.9rem; white-space: pre-wrap; word-break: break-all; }
.msg.ok { color: var(--ok); }
.msg.err { color: var(--danger); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow);
}
.opt-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 12px; }
.opt { display: flex; align-items: center; gap: 8px; margin: 8px 0; }
.opt input[type="range"] { flex: 1; margin-bottom: 0; }
.opt-group { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 8px; }

/* 二维码 */
.qr-box { display: flex; align-items: center; justify-content: center; }
#qrCanvas {
  border: 1px dashed var(--border); border-radius: var(--radius);
  background: var(--bg-card); max-width: 100%; height: auto;
}

/* 密码 */
.pw-row { display: flex; gap: 8px; align-items: stretch; margin-bottom: 10px; }
.pw-display {
  flex: 1; font-family: ui-monospace, Consolas, monospace; font-size: 1.15rem;
  background: var(--accent-soft); border-radius: 10px; padding: 10px 12px;
  word-break: break-all; user-select: all;
}
.pw-strength { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 0.85rem; color: var(--fg-muted); }
.pw-strength-bar {
  flex: 1; height: 6px; background: var(--accent-soft);
  border-radius: 999px; overflow: hidden;
}
.pw-strength-bar i {
  display: block; height: 100%; width: 0;
  border-radius: 999px; background: var(--danger);
  transition: width 0.3s ease, background 0.3s ease;
}
.pw-strength-bar i.mid { background: var(--warn); }
.pw-strength-bar i.good { background: var(--accent); }
.pw-strength-bar i.strong { background: var(--ok); }

/* Markdown */
.md-toolbar {
  display: flex; gap: 6px; flex-wrap: wrap; align-items: center;
  margin-bottom: 10px; padding: 6px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
}
.md-count { margin-left: auto; color: var(--fg-muted); font-size: 0.82rem; }
.md-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.md-grid textarea { height: 380px; margin-bottom: 0; }
.md-preview {
  height: 380px; overflow: auto; padding: 12px 16px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
}
.md-preview h1, .md-preview h2 { border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.md-preview code { background: var(--accent-soft); }
.md-preview pre { background: var(--accent-soft); padding: 10px; border-radius: 8px; overflow: auto; }
.md-preview blockquote { border-left: 3px solid var(--accent); margin-left: 0; padding-left: 12px; color: var(--fg-muted); }
.md-preview img { max-width: 100%; }
.md-preview a { color: var(--accent); }
.md-preview table { border-collapse: collapse; }
.md-preview th, .md-preview td { border: 1px solid var(--border); padding: 4px 10px; }

/* 每日一签 */
.daily-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin-top: 16px;
  box-shadow: var(--shadow);
}
.daily-card img {
  width: 100%; max-height: 300px; object-fit: cover; display: block;
  aspect-ratio: 12 / 5; background: linear-gradient(135deg, var(--accent-soft), var(--bg-card));
}
.daily-card.img-failed img { display: none; }
.daily-card.img-failed::before {
  content: "🖼️ 配图加载失败（可能离线），文字不受影响";
  display: block; padding: 60px 20px; text-align: center; color: var(--fg-muted);
}
.daily-body { padding: 16px 20px 20px; }
.daily-date { color: var(--fg-muted); margin: 0 0 8px; font-size: 0.9rem; }
.daily-card blockquote { margin: 0 0 8px; font-size: 1.25rem; font-weight: 600; line-height: 1.5; }
.daily-author { color: var(--fg-muted); margin: 0 0 12px; }

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--border); padding: 18px 0;
  color: var(--fg-muted); font-size: 0.88rem;
}
.footer-grid { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-grid p { margin: 0; }
.site-footer a { color: var(--accent); }

.noscript-tip {
  margin: 16px; padding: 12px 16px;
  background: var(--accent-soft); border: 1px solid var(--border); border-radius: var(--radius);
}

/* 滚动条（深色下不刺眼） */
.md-preview::-webkit-scrollbar, .tool-nav::-webkit-scrollbar { width: 8px; height: 8px; }
.md-preview::-webkit-scrollbar-thumb, .tool-nav::-webkit-scrollbar-thumb {
  background: var(--border); border-radius: 999px;
}

@media (max-width: 640px) {
  .grid-2, .md-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 8px 12px; gap: 8px; }
  .brand { font-size: 0.98rem; }
}

/* 动画弱化偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 新工具 ---------- */
.kv {
  display: flex; align-items: center; gap: 10px;
  background: var(--accent-soft); border-radius: 10px;
  padding: 7px 12px; margin-bottom: 7px;
}
.kv > span { width: 3em; color: var(--fg-muted); font-size: 0.88rem; flex: none; }
.kv code { flex: 1; background: transparent; padding: 0; word-break: break-all; }

.swatches { display: flex; gap: 8px; }
.swatch { flex: 1; text-align: center; cursor: pointer; }
.swatch .block {
  height: 52px; border-radius: 10px; border: 1px solid var(--border);
  margin-bottom: 6px; transition: transform 0.12s ease;
}
.swatch:hover .block { transform: scale(1.05); }
.swatch small { color: var(--fg-muted); font-size: 0.7rem; }

.add-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.add-row input[type="text"], .add-row input:not([type]) { flex: 1; min-width: 120px; margin-bottom: 0; }

.diff-view {
  font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 8px 0; margin-top: 10px;
  max-height: 420px; overflow: auto; min-height: 60px;
}
.diff-line { padding: 1px 14px; white-space: pre-wrap; word-break: break-all; }
.diff-line::before { display: inline-block; width: 1.2em; color: var(--fg-muted); }
.diff-line.add { background: rgb(122 240 200 / 0.12); }
.diff-line.add::before { content: "+ "; color: var(--ok); }
.diff-line.del { background: rgb(255 123 142 / 0.12); }
.diff-line.del::before { content: "- "; color: var(--danger); }

.hl { background: var(--accent); color: #fff; border-radius: 3px; padding: 0 2px; }
.re-group { margin-top: 10px; font-size: 0.86rem; color: var(--fg-muted); }
.re-group code { background: var(--accent-soft); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin-top: 12px; }
.stat-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.stat-box b { display: block; font-size: 1.35rem; }
.stat-box span { color: var(--fg-muted); font-size: 0.8rem; }

/* 音乐解锁 */
.drop-zone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 30px 16px; text-align: center; color: var(--fg-muted);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.drop-zone.over { border-color: var(--accent); background: var(--accent-soft); color: var(--fg); }
.audio-result {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 14px; margin-bottom: 8px;
}
.audio-result .ar-name { flex: 1; word-break: break-all; }
.audio-result .ar-size { color: var(--fg-muted); font-size: 0.82rem; white-space: nowrap; }

.pw-history { margin-top: 10px; }
.pw-history .pw-hist-row {
  display: flex; align-items: center; gap: 8px;
  font-family: ui-monospace, Consolas, monospace; font-size: 0.8rem;
  color: var(--fg-muted); padding: 3px 2px;
}
.pw-history .pw-hist-row code { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; background: transparent; padding: 0; }

.jwt-pre {
  font-family: ui-monospace, Consolas, monospace; font-size: 0.82rem;
  background: var(--accent-soft); border-radius: 8px; padding: 10px 12px;
  overflow: auto; max-height: 260px; margin: 0 0 8px; white-space: pre-wrap; word-break: break-all;
}
.jwt-time { font-size: 0.86rem; margin: 4px 0; }
.jwt-time .ok { color: var(--ok); }
.jwt-time .bad { color: var(--danger); }

.ct-preview { border-radius: var(--radius); padding: 18px 20px; border: 1px solid var(--border); transition: background 0.2s ease, color 0.2s ease; }
.ct-preview h3 { margin-top: 0; }
.ct-level { display: flex; gap: 8px; align-items: center; margin: 6px 0; font-size: 0.9rem; }
.ct-level .badge { border-radius: 999px; padding: 1px 10px; font-size: 0.8rem; font-weight: 700; }
.ct-level .pass { background: var(--ok); color: #0d1024; }
.ct-level .fail { background: var(--danger); color: #fff; }

@media (max-width: 640px) {
  .grid-2 { grid-template-columns: 1fr; }
  .swatches { flex-wrap: wrap; }
}