/* ========== DevTools 全局样式 ========== */
:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-panel: #1c2330;
  --border: #2d3644;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --primary: #4f8ef7;
  --primary-hover: #6aa2ff;
  --success: #3fb950;
  --danger: #f85149;
  --radius: 10px;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace;
}
[data-theme="light"] {
  --bg: #f6f8fa;
  --bg-soft: #ffffff;
  --bg-panel: #ffffff;
  --border: #d0d7de;
  --text: #1f2328;
  --text-dim: #59636e;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
h1 { font-size: 1.6rem; margin-bottom: .5rem; }
h2 { font-size: 1.2rem; margin: 1.6rem 0 .6rem; }
h3 { font-size: 1.05rem; margin: 1.2rem 0 .4rem; }
p { margin-bottom: .6rem; }
ul, ol { padding-left: 1.4rem; margin-bottom: .6rem; }
code {
  font-family: var(--mono);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .1em .4em;
  font-size: .9em;
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 1.2rem;
  height: 56px; display: flex; align-items: center; gap: 1.5rem;
}
.logo {
  font-size: 1.15rem; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: .45rem;
}
.logo svg { color: var(--primary); }
.header-nav { display: flex; gap: 1.2rem; flex: 1; }
.header-nav a { color: var(--text-dim); font-size: .95rem; }
.header-nav a:hover, .header-nav a.active { color: var(--text); }
.theme-toggle {
  background: none; border: 1px solid var(--border); border-radius: 8px;
  color: var(--text-dim); cursor: pointer; padding: .35rem .5rem;
  display: flex; align-items: center;
}
.theme-toggle:hover { color: var(--text); border-color: var(--text-dim); }

/* ---------- 布局 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 1.5rem 1.2rem 3rem; width: 100%; flex: 1; }
.breadcrumb { font-size: .85rem; color: var(--text-dim); margin-bottom: 1rem; }
.tool-intro { color: var(--text-dim); margin-bottom: 1.4rem; max-width: 760px; }

/* ---------- 首页 ---------- */
.hero { text-align: center; padding: 3rem 1rem 2rem; }
.hero h1 { font-size: 2.2rem; margin-bottom: .8rem; }
.hero p { color: var(--text-dim); max-width: 560px; margin: 0 auto 1.5rem; }
.search-box { max-width: 480px; margin: 0 auto; position: relative; }
.search-box input {
  width: 100%; padding: .8rem 1rem .8rem 2.6rem;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 24px; color: var(--text); font-size: 1rem;
}
.search-box input:focus { outline: none; border-color: var(--primary); }
.search-box svg {
  position: absolute; left: 1rem; top: 50%; transform: translateY(-50%);
  color: var(--text-dim);
}
.cat-title {
  font-size: .85rem; color: var(--text-dim); text-transform: uppercase;
  letter-spacing: .08em; margin: 2.2rem 0 .9rem;
  display: flex; align-items: center; gap: .6rem;
}
.cat-title::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.tool-grid {
  display: grid; gap: .9rem;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}
.tool-card {
  display: flex; gap: .8rem; align-items: flex-start;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.1rem;
  transition: border-color .15s, transform .15s;
}
.tool-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.tool-badge {
  flex: none; width: 38px; height: 38px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .8rem; color: #fff;
  font-family: var(--mono);
}
.tool-card h3 { margin: 0 0 .2rem; font-size: 1rem; color: var(--text); }
.tool-card p { margin: 0; font-size: .83rem; color: var(--text-dim); line-height: 1.45; }
.no-result { color: var(--text-dim); text-align: center; padding: 2rem 0; display: none; }
.features { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 3rem; }
.feature {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.2rem;
}
.feature h3 { margin: 0 0 .4rem; font-size: .95rem; }
.feature p { margin: 0; font-size: .85rem; color: var(--text-dim); }

/* ---------- 工具工作区 ---------- */
.workspace {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.2rem;
}
.toolbar { display: flex; flex-wrap: wrap; gap: .6rem; margin: .9rem 0; align-items: center; }
.io-grid { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; }
.io-grid.single { grid-template-columns: 1fr; }
.field-label {
  display: block; font-size: .85rem; color: var(--text-dim); margin-bottom: .4rem;
}
/* 表单控件样式限定在工作区内，避免影响首页搜索框等其它输入框 */
.workspace textarea, .workspace input[type="text"], .workspace input[type="number"], .workspace select {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: .6rem .75rem; font-size: .92rem; font-family: inherit;
}
.workspace textarea { font-family: var(--mono); min-height: 180px; resize: vertical; line-height: 1.5; }
.workspace textarea:focus, .workspace input:focus, .workspace select:focus { outline: none; border-color: var(--primary); }
.workspace input[type="color"] {
  width: 56px; height: 38px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg); padding: 2px; cursor: pointer;
}
.output {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: .75rem; min-height: 180px; font-family: var(--mono);
  font-size: .92rem; white-space: pre-wrap; word-break: break-all;
  overflow: auto; line-height: 1.5;
}
.output.small { min-height: 44px; }
.btn {
  display: inline-flex; align-items: center; gap: .35rem;
  background: var(--bg-panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: .5rem 1rem; font-size: .9rem; cursor: pointer;
  transition: background .15s, border-color .15s;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.hint { font-size: .82rem; color: var(--text-dim); }
.error-text { color: var(--danger); font-size: .88rem; margin-top: .5rem; font-family: var(--mono); white-space: pre-wrap; }
.ok-text { color: var(--success); font-size: .88rem; margin-top: .5rem; }
.result-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.result-table th, .result-table td {
  border: 1px solid var(--border); padding: .5rem .7rem; text-align: left;
}
.result-table th { background: var(--bg-panel); color: var(--text-dim); font-weight: 500; white-space: nowrap; }
.result-table td { font-family: var(--mono); word-break: break-all; }
.check-group { display: flex; flex-wrap: wrap; gap: .8rem 1.4rem; align-items: center; }
.check-group label { display: inline-flex; align-items: center; gap: .35rem; font-size: .9rem; cursor: pointer; }
.badge-ok { color: var(--success); }
.badge-err { color: var(--danger); }
.diff-add { background: rgba(63,185,80,.15); display: block; }
.diff-del { background: rgba(248,81,73,.15); display: block; }
.match-item { padding: .3rem 0; border-bottom: 1px dashed var(--border); }
mark { background: rgba(79,142,247,.35); color: inherit; border-radius: 2px; }
.color-preview {
  width: 100%; height: 70px; border-radius: 8px;
  border: 1px solid var(--border); margin-bottom: 1rem;
}

/* ---------- SEO 文档区 ---------- */
.doc { max-width: 820px; margin-top: 2.5rem; color: var(--text-dim); font-size: .95rem; }
.doc h2, .doc h3 { color: var(--text); }
.doc details {
  border: 1px solid var(--border); border-radius: 8px;
  padding: .7rem 1rem; margin-bottom: .6rem; background: var(--bg-soft);
}
.doc summary { cursor: pointer; color: var(--text); font-weight: 500; }
.doc details p { margin-top: .5rem; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border); background: var(--bg-soft);
  padding: 1.4rem 1.2rem; text-align: center;
  color: var(--text-dim); font-size: .85rem;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 2.2rem; transform: translateX(-50%) translateY(20px);
  background: var(--bg-panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: .55rem 1.1rem; font-size: .9rem; z-index: 999;
  opacity: 0; transition: opacity .2s, transform .2s; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .io-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.6rem; }
  .header-nav { gap: .8rem; }
}