/* xnode 面板 — Corporate Clean 风格 · 日间/夜间双主题
 * 日间为默认；夜间经 html[data-theme="dark"] 或（无 JS 兜底）prefers-color-scheme。 */

:root {
  color-scheme: light;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-fg: #ffffff;
  --ring: #3b82f6;
  --ok: #16a34a;
  --ok-bg: rgba(22, 163, 74, .12);
  --bad: #dc2626;
  --bad-bg: rgba(220, 38, 38, .12);
  --code-bg: #f1f5f9;
  --info-bg: #eff6ff;
  --info-border: #93c5fd;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);
  --chart-up: rgba(37, 99, 235, .75);
  --chart-down: rgba(22, 163, 74, .75);
  --chart-grid: #e2e8f0;
  --chart-tick: #64748b;
  --chart-legend: #0f172a;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #283548;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-fg: #ffffff;
  --ring: #60a5fa;
  --ok: #22c55e;
  --ok-bg: rgba(34, 197, 94, .15);
  --bad: #ef4444;
  --bad-bg: rgba(239, 68, 68, .15);
  --code-bg: #0f172a;
  --info-bg: rgba(37, 99, 235, .12);
  --info-border: #1e40af;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .35);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / .5), 0 2px 4px -2px rgb(0 0 0 / .4);
  --chart-up: rgba(59, 130, 246, .75);
  --chart-down: rgba(34, 197, 94, .75);
  --chart-grid: #334155;
  --chart-tick: #94a3b8;
  --chart-legend: #e2e8f0;
}

/* 无 JS 兜底：未设置 data-theme 时跟随系统偏好 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-hover: #283548;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: #334155;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-fg: #ffffff;
    --ring: #60a5fa;
    --ok: #22c55e;
    --ok-bg: rgba(34, 197, 94, .15);
    --bad: #ef4444;
    --bad-bg: rgba(239, 68, 68, .15);
    --code-bg: #0f172a;
    --info-bg: rgba(37, 99, 235, .12);
    --info-border: #1e40af;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .35);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / .5), 0 2px 4px -2px rgb(0 0 0 / .4);
    --chart-up: rgba(59, 130, 246, .75);
    --chart-down: rgba(34, 197, 94, .75);
    --chart-grid: #334155;
    --chart-tick: #94a3b8;
    --chart-legend: #e2e8f0;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  padding: 0;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

h1 { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 20px; }
h2 { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; margin: 24px 0 12px; }
h3 { font-size: 15px; font-weight: 600; margin-bottom: 10px; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }

/* ---------- 顶栏 ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.brand { font-weight: 600; color: var(--text); }
header nav { display: flex; align-items: center; gap: 4px; }
header nav a { color: var(--muted); padding: 6px 10px; border-radius: 8px; }
header nav a:hover { color: var(--text); background: var(--surface-hover); }
header nav a.active { color: var(--text); background: var(--surface-hover); }

.header-actions { display: flex; align-items: center; gap: 4px; }
.header-actions a { color: var(--muted); padding: 6px 10px; border-radius: 8px; }
.header-actions a:hover { color: var(--text); background: var(--surface-hover); }
/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  line-height: 1.5;
  background: var(--primary);
  color: var(--primary-fg);
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all .2s;
}
.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn:active { transform: scale(.98); }
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--ring);
}
.btn.danger { background: var(--bad); color: #fff; }
.btn.danger:hover { background: var(--bad); filter: brightness(.92); }
.btn.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: none;
}
.btn.ghost:hover { background: var(--surface-hover); transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* 主题切换图标按钮 */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--muted);
  cursor: pointer;
  transition: all .2s;
}
.theme-toggle:hover { background: var(--surface-hover); color: var(--text); }
.theme-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--ring);
}
.theme-toggle svg { display: block; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: all .2s;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.card > h2:first-child { margin-top: 0; }
.card.danger-zone { border-color: var(--bad); }
.card.danger-zone h2 { color: var(--bad); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }

.node-title { margin: 0 0 12px; }
.node-link { color: var(--text); }
.node-link:hover { color: var(--primary); }
.node-meta { margin-top: 12px; }
.link-row { margin-bottom: 10px; }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: 13px; }
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background-color .2s; }
tbody tr:hover td { background: var(--surface-hover); }

/* ---------- 徽标 ---------- */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  vertical-align: middle;
}
.badge.on { background: var(--ok-bg); color: var(--ok); }
.badge.off { background: var(--bad-bg); color: var(--bad); }

/* ---------- 表单 ---------- */
form p { margin-bottom: 12px; }
label { display: block; color: var(--muted); font-size: 13px; margin-bottom: 4px; }
input, select {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color .2s, box-shadow .2s;
}
input::placeholder { color: var(--muted); }
input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .25);
}

/* ---------- 代码块 ---------- */
pre.code {
  background: var(--code-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-all;
  user-select: all;
  margin: 8px 0;
}
.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--primary);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  margin-left: 8px;
  transition: all .2s;
}
.copy-btn:hover { background: var(--surface-hover); }
.copy-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--code-bg), 0 0 0 4px var(--ring);
}

/* ---------- 统计 ---------- */
.stat { display: inline-block; margin-right: 32px; }
.stat .v { font-size: 20px; font-weight: 600; }
.stat .k { color: var(--muted); font-size: 12px; }

/* ---------- 横幅（node_created 提示） ---------- */
.banner {
  background: var(--info-bg);
  border: 1px solid var(--info-border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}
.banner h3 { color: var(--primary); margin-bottom: 10px; }
.banner p { margin-bottom: 6px; }

/* ---------- 登录页 ---------- */
.login-wrap { position: relative; }
.login-box { max-width: 400px; margin: 12vh auto; }
.login-box h1 { text-align: center; margin-bottom: 16px; }
.login-box .btn { width: 100%; }
.login-toggle { position: absolute; top: 16px; right: 16px; }

.error { color: var(--bad); margin: 8px 0; }
.success { color: var(--ok); margin: 8px 0; }
.muted { color: var(--muted); font-size: 13px; }

.chart-wrap { height: 300px; }