/* ===== Material Design 3 — dark default, light optional ===== */
:root,
[data-theme="dark"] {
  --bg: #1c1b1f;
  --on-bg: #e6e0e9;
  --surface: #211f26;
  --surface-2: #2b2930;
  --surface-variant: #49454f;
  --on-surface: #e6e0e9;
  --on-surface-variant: #cac4d0;
  --outline: #49454f;
  --primary: #d0bcff;
  --on-primary: #381e72;
  --primary-container: #4f378b;
  --on-primary-container: #eaddff;
  --secondary-container: #4a4458;
  --tertiary: #efb8c8;
  --error: #f2b8b5;
  --scrim: rgba(0, 0, 0, 0.5);
  --elev-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px 1px rgba(0,0,0,.15);
  --elev-2: 0 1px 2px rgba(0,0,0,.30), 0 2px 6px 2px rgba(0,0,0,.15);
  --elev-3: 0 4px 8px 3px rgba(0,0,0,.15), 0 1px 3px rgba(0,0,0,.30);
  --radius-s: 8px; --radius-m: 12px; --radius-l: 16px; --radius-xl: 28px;
}
[data-theme="light"] {
  --bg: #fef7ff;
  --on-bg: #1d1b20;
  --surface: #fffbfe;
  --surface-2: #f5eff7;
  --surface-variant: #e7e0ec;
  --on-surface: #1d1b20;
  --on-surface-variant: #49454f;
  --outline: #cac4d0;
  --primary: #6750a4;
  --on-primary: #ffffff;
  --primary-container: #eaddff;
  --on-primary-container: #21005d;
  --secondary-container: #e8def8;
  --tertiary: #7d5260;
  --error: #b3261e;
  --scrim: rgba(0,0,0,.32);
  --elev-1: 0 1px 2px rgba(0,0,0,.10), 0 1px 3px 1px rgba(0,0,0,.05);
  --elev-2: 0 1px 2px rgba(0,0,0,.10), 0 2px 6px 2px rgba(0,0,0,.05);
  --elev-3: 0 4px 8px 3px rgba(0,0,0,.05), 0 1px 3px rgba(0,0,0,.10);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Roboto", "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--on-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ---- Top App Bar ---- */
.app-bar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 20px;
  background: var(--surface);
  color: var(--on-surface);
  box-shadow: var(--elev-1);
}
.app-bar .title { font-size: 20px; font-weight: 500; letter-spacing: .2px; }
.app-bar .spacer { flex: 1; }

/* ---- Buttons (MD3) ---- */
.btn {
  font: inherit; font-weight: 500; letter-spacing: .3px;
  border: none; cursor: pointer; border-radius: 999px;
  padding: 10px 24px; display: inline-flex; align-items: center; gap: 8px;
  transition: box-shadow .2s, background .2s;
}
.btn-filled { background: var(--primary); color: var(--on-primary); box-shadow: var(--elev-1); }
.btn-filled:hover { box-shadow: var(--elev-2); }
.btn-tonal { background: var(--secondary-container); color: var(--on-surface); }
.btn-outlined { background: transparent; color: var(--primary); border: 1px solid var(--outline); }
.btn-text { background: transparent; color: var(--primary); padding: 8px 12px; }
.btn-danger { background: transparent; color: var(--error); border: 1px solid var(--outline); }
.btn:disabled { opacity: .5; cursor: default; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 999px; border: none; cursor: pointer;
  background: transparent; color: var(--on-surface); display: inline-grid; place-items: center;
}
.icon-btn:hover { background: color-mix(in srgb, var(--on-surface) 8%, transparent); }

/* ---- Cards ---- */
.card {
  background: var(--surface); color: var(--on-surface);
  border-radius: var(--radius-l); box-shadow: var(--elev-1); padding: 20px;
}
.card-2 { box-shadow: var(--elev-2); }

/* ---- Text fields (outlined) ---- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field > label { font-size: 12px; color: var(--on-surface-variant); }
.input, .textarea, select.input {
  font: inherit; color: var(--on-surface); background: transparent;
  border: 1px solid var(--outline); border-radius: var(--radius-s);
  padding: 12px 14px; width: 100%; outline: none;
}
.input:focus, .textarea:focus { border-color: var(--primary); border-width: 2px; }
.textarea { resize: vertical; min-height: 84px; }

/* ---- Chips ---- */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--secondary-container); color: var(--on-surface);
  border-radius: 999px; padding: 8px 16px; font-size: 14px; font-weight: 500;
}

/* ---- Layout ---- */
.container { max-width: 1080px; margin: 0 auto; padding: 24px 20px 64px; }
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.grid { display: grid; gap: 16px; }
.stat-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.section-title { font-size: 22px; font-weight: 500; margin: 28px 0 14px; }

/* ---- Nav (admin) ---- */
.nav { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; }
.nav a {
  padding: 8px 18px; border-radius: 999px; color: var(--on-surface-variant);
  border: 1px solid var(--outline); font-size: 14px; font-weight: 500;
}
.nav a.active { background: var(--primary-container); color: var(--on-primary-container); border-color: transparent; }

/* ---- Tables / lists ---- */
.item-list { display: grid; gap: 12px; }
.item {
  display: flex; align-items: center; gap: 14px; padding: 14px 16px;
  background: var(--surface); border-radius: var(--radius-m); box-shadow: var(--elev-1);
}
.item .ico { font-size: 24px; width: 40px; text-align: center; }
.item .meta { flex: 1; min-width: 0; }
.item .meta .t { font-weight: 500; }
.item .meta .s { color: var(--on-surface-variant); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item .meta .u { color: var(--primary); font-size: 12px; word-break: break-all; }
.tag { font-size: 12px; padding: 2px 10px; border-radius: 999px; background: var(--surface-variant); color: var(--on-surface-variant); }
.tag.off { opacity: .55; }

/* ---- Modal ---- */
.modal-scrim { position: fixed; inset: 0; background: var(--scrim); display: none; place-items: center; z-index: 50; padding: 20px; }
.modal-scrim.open { display: grid; }
.modal {
  width: min(520px, 100%); background: var(--surface); color: var(--on-surface);
  border-radius: var(--radius-xl); box-shadow: var(--elev-3); padding: 24px;
  max-height: 90vh; overflow: auto;
}
.modal h3 { margin: 0 0 16px; font-weight: 500; font-size: 20px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* ---- Charts ---- */
.chart-card { padding: 18px 20px; }
.chart-title { font-size: 15px; color: var(--on-surface-variant); margin-bottom: 10px; }
canvas { width: 100%; display: block; }

/* ---- Login ---- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px;
  background: radial-gradient(1200px 600px at 50% -10%, var(--primary-container), transparent 60%), var(--bg); }
.login-card { width: min(400px, 100%); background: var(--surface); border-radius: var(--radius-xl); box-shadow: var(--elev-3); padding: 32px; }
.login-card h1 { margin: 0 0 4px; font-size: 26px; font-weight: 500; }
.login-card .sub { color: var(--on-surface-variant); margin-bottom: 24px; font-size: 14px; }
.err { color: var(--error); font-size: 13px; margin-bottom: 12px; min-height: 16px; }
.logo-mark { width: 56px; height: 56px; border-radius: 18px; background: var(--primary-container); color: var(--on-primary-container); display: grid; place-items: center; font-size: 28px; margin-bottom: 14px; }

/* ===== Public homepage ===== */
.home-hero {
  position: relative; min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 40px 20px;
  overflow: hidden;
}
.home-bg { position: absolute; inset: 0; background-size: cover; background-position: center; z-index: 0; }
.home-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,.45), rgba(0,0,0,.75)); }
.home-inner { position: relative; z-index: 1; max-width: 900px; width: 100%; }
.home-avatar {
  width: 132px; height: 132px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--primary); box-shadow: 0 0 0 8px color-mix(in srgb, var(--primary) 25%, transparent), var(--elev-3);
  margin-bottom: 18px;
}
/* 头像保底默认图：加载失败或留空时显示大字 M */
.home-avatar-fallback {
  width: 132px; height: 132px; border-radius: 50%;
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--primary) 25%, transparent), var(--elev-3);
  margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-container); color: var(--on-primary-container);
  font-size: 58px; font-weight: 700; letter-spacing: 1px; user-select: none;
}
.avatar-fallback {
  width: 120px; height: 120px; border-radius: 50%;
  border: 3px solid var(--primary);
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary-container); color: var(--on-primary-container);
  font-size: 54px; font-weight: 700; user-select: none;
}
.home-name { font-size: 40px; font-weight: 500; margin: 0; }
.home-title { font-size: 18px; color: var(--primary); margin: 6px 0 14px; letter-spacing: 1px; }
.home-bio { color: #e6e0e9; opacity: .82; max-width: 560px; margin: 0 auto 28px; }
.home-section-title { font-size: 14px; text-transform: uppercase; letter-spacing: 2px; color: var(--on-surface-variant); margin: 34px 0 16px; }
.home-sites { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.home-site {
  display: flex; align-items: center; gap: 14px; text-align: left;
  background: rgba(33,31,38,.66); backdrop-filter: blur(8px); border: 1px solid var(--outline);
  border-radius: var(--radius-l); padding: 16px 18px; transition: transform .15s, border-color .15s;
}
.home-site:hover { transform: translateY(-3px); border-color: var(--primary); }
.home-site .ico { font-size: 26px; }
.home-site .t { font-weight: 600; }
.home-site .s { font-size: 13px; color: var(--on-surface-variant); }
.home-socials { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 10px; }
.home-social { backdrop-filter: blur(8px); }
.home-foot { position: relative; z-index: 1; margin-top: 40px; font-size: 13px; color: var(--on-surface-variant); }
.home-toggle { position: fixed; top: 16px; right: 16px; z-index: 5; }

/* utilities */
.muted { color: var(--on-surface-variant); }
.center { text-align: center; }
.empty { text-align: center; color: var(--on-surface-variant); padding: 40px; }
.spin { display: inline-block; width: 18px; height: 18px; border: 2px solid var(--on-surface-variant); border-top-color: var(--primary); border-radius: 50%; animation: sp .7s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }

/* ---------- 站点监控页 ---------- */
.mon-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.mon-card { padding: 16px; }
.mon-metrics { display: flex; gap: 24px; }
.mon-metrics > div { display: flex; flex-direction: column; }
.mon-metrics b { font-size: 20px; line-height: 1.2; }
.mon-metrics .muted { font-size: 11px; }
.pill { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.st-up   { background: color-mix(in srgb, var(--primary) 22%, transparent); color: var(--primary); }
.st-ext  { background: color-mix(in srgb, var(--tertiary) 26%, transparent); color: var(--tertiary); }
.st-down { background: color-mix(in srgb, #d32f2f 22%, transparent); color: #d32f2f; }

/* ---------- 服务器监控页 ---------- */
.srv-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.gauge { display: flex; align-items: baseline; gap: 6px; }
.gauge .num { font-size: 42px; font-weight: 500; line-height: 1.1; }
.gauge .unit { font-size: 16px; color: var(--on-surface-variant); }
.bar { height: 10px; border-radius: 999px; background: var(--surface-variant); overflow: hidden; margin: 6px 0; }
.bar > i { display: block; height: 100%; border-radius: 999px; background: var(--primary); transition: width .4s; }
.bar.warn > i { background: var(--tertiary); }
.bar.crit > i { background: #d32f2f; }
.kv { display: flex; justify-content: space-between; font-size: 13px; color: var(--on-surface-variant); padding: 2px 0; }
.cores { display: grid; grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); gap: 10px; }
.core { text-align: center; font-size: 12px; color: var(--on-surface-variant); }
.core .bar { height: 6px; margin: 4px 0 0; }
.iface-row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--outline); }
.iface-row:last-child { border-bottom: none; }
.net-rate { font-variant-numeric: tabular-nums; font-size: 13px; }
/* 设置表单 */
.section-title { font-size: 14px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--primary); margin: 18px 0 10px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 8px 24px; }
.toggle { display: inline-flex; align-items: center; gap: 8px; font-weight: 500; cursor: pointer; }
.toggle input { width: 18px; height: 18px; accent-color: var(--primary); }