/* ==========================================================
   后台管理 · 样式
   ========================================================== */
:root {
  --a-bg: #f4f6fb;
  --a-panel: #ffffff;
  --a-line: #e6e9f2;
  --a-txt: #1d2333;
  --a-muted: #6b7488;
  --a-muted2: #99a1b3;
  --a-pri: #5b5bd6;
  --a-pri-d: #4a4ac4;
  --a-pri-l: #eef0fe;
  --a-ok: #16a34a;
  --a-warn: #d97706;
  --a-err: #dc2626;
  --a-side: #0f1220;
  --a-side-2: #161a2b;
  --a-radius: 14px;
  --a-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px -12px rgba(16, 24, 40, .12);
  --a-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--a-bg); color: var(--a-txt);
  font-family: var(--a-font); font-size: 14px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--a-pri); text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; }
p { margin: 0; }

/* ---------- 布局 ---------- */
.adm { display: grid; grid-template-columns: 236px 1fr; min-height: 100vh; }

.side {
  background: linear-gradient(180deg, #10131f, #0b0e18);
  color: #cdd4e4; padding: 20px 14px; position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column; gap: 22px; overflow-y: auto;
}
.side-brand { display: flex; align-items: center; gap: 10px; padding: 2px 8px 0; }
.side-brand .mk {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(140deg, #7c6cff, #38bdf8); color: #0b0e18; font-weight: 800;
}
.side-brand b { color: #fff; font-size: 14.5px; display: block; line-height: 1.25; }
.side-brand small { font-size: 9.5px; color: #6d778c; letter-spacing: .18em; }

.side-nav { display: flex; flex-direction: column; gap: 3px; }
.side-nav .grp { font-size: 10.5px; letter-spacing: .16em; color: #5f6a80; padding: 14px 10px 6px; text-transform: uppercase; }
.side-nav a {
  display: flex; align-items: center; gap: 10px; padding: 9px 11px; border-radius: 10px;
  color: #b7c0d4; font-size: 13.5px; transition: .18s;
}
.side-nav a:hover { background: rgba(255, 255, 255, .06); color: #fff; }
.side-nav a.on { background: rgba(124, 108, 255, .18); color: #fff; box-shadow: inset 0 0 0 1px rgba(124, 108, 255, .34); }
.side-nav svg { width: 16px; height: 16px; opacity: .9; }

.side-foot { margin-top: auto; padding: 12px 10px 4px; border-top: 1px solid rgba(255, 255, 255, .07); font-size: 11.5px; color: #6d778c; }
.side-foot a { color: #98a3b8; }
.side-foot a:hover { color: #fff; }

.main { padding: 0 0 40px; min-width: 0; }
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 14px;
  padding: 14px 28px; background: rgba(244, 246, 251, .88); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--a-line);
}
.topbar h1 { font-size: 16.5px; font-weight: 700; }
.topbar .grow { flex: 1; }
.topbar .who { font-size: 12.5px; color: var(--a-muted); }

.content { padding: 24px 28px; max-width: 1180px; }

/* ---------- 卡片 / 面板 ---------- */
.panel {
  background: var(--a-panel); border: 1px solid var(--a-line); border-radius: var(--a-radius);
  box-shadow: var(--a-shadow); margin-bottom: 18px; overflow: hidden;
}
.panel-head { padding: 16px 20px; border-bottom: 1px solid var(--a-line); display: flex; align-items: center; gap: 12px; }
.panel-head h2 { font-size: 14.5px; font-weight: 700; }
.panel-head .grow { flex: 1; }
.panel-head p { font-size: 12.5px; color: var(--a-muted); }
.panel-body { padding: 20px; }
.panel-body.tight { padding: 14px 20px; }

/* ---------- 统计卡 ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.stat-card { background: #fff; border: 1px solid var(--a-line); border-radius: var(--a-radius); padding: 16px 18px; box-shadow: var(--a-shadow); }
.stat-card span { font-size: 12px; color: var(--a-muted); }
.stat-card b { display: block; font-size: 23px; font-weight: 750; letter-spacing: -.02em; margin-top: 4px; }
.stat-card em { font-style: normal; font-size: 11.5px; color: var(--a-muted2); }

/* ---------- 表单 ---------- */
.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }
.field > label { display: block; font-size: 12.8px; font-weight: 600; margin-bottom: 7px; }
.field .hint { font-size: 11.8px; color: var(--a-muted); margin-top: 6px; line-height: 1.55; }

.input, .textarea, .select {
  width: 100%; padding: 9px 12px; border: 1px solid #dfe4ef; border-radius: 10px;
  font-family: inherit; font-size: 13.5px; color: var(--a-txt); background: #fbfcfe;
  transition: border-color .18s, box-shadow .18s, background .18s;
}
.input:focus, .textarea:focus, .select:focus {
  outline: none; border-color: #a9a7f0; background: #fff;
  box-shadow: 0 0 0 3px rgba(91, 91, 214, .12);
}
.textarea { min-height: 96px; resize: vertical; line-height: 1.7; }
.textarea.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.6px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

.check { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; cursor: pointer; }
.check input { width: 15px; height: 15px; accent-color: var(--a-pri); }

/* ---------- 皮肤 / 模式选择卡 ---------- */
.skin-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.mode-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; max-width: 620px; }
.skin-card {
  position: relative; display: block; padding: 13px 14px; border-radius: 12px; cursor: pointer;
  border: 1px solid var(--a-line); background: #fbfcff; transition: .18s;
}
.skin-card:hover { border-color: #c9c9ee; background: #fff; }
.skin-card input { position: absolute; opacity: 0; pointer-events: none; }
.skin-card .sw { display: flex; gap: 6px; margin-bottom: 10px; }
.skin-card .sw i { width: 22px; height: 22px; border-radius: 7px; display: block; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .06); }
.skin-card b { display: block; font-size: 13.2px; font-weight: 650; }
.skin-card small { display: block; font-size: 11.2px; color: var(--a-muted); margin-top: 3px; line-height: 1.5; }
.skin-card .tick {
  position: absolute; top: 10px; right: 10px; width: 17px; height: 17px; border-radius: 50%;
  background: var(--a-pri); color: #fff; font-size: 10px; place-items: center; display: none;
}
.skin-card.on { border-color: var(--a-pri); background: #fff; box-shadow: 0 0 0 3px rgba(91, 91, 214, .13); }
.skin-card.on .tick { display: grid; }
/* 纯 CSS 兜底：即使脚本未加载 / 被缓存，选中的卡片也会高亮 */
.skin-card:has(input:checked) { border-color: var(--a-pri); background: #fff; box-shadow: 0 0 0 3px rgba(91, 91, 214, .13); }
.skin-card:has(input:checked) .tick { display: grid; }
.mode-grid .skin-card { padding: 12px 13px; }

/* ---------- 脚本未加载提示 ---------- */
#jsWarn {
  display: flex; gap: 10px; align-items: flex-start; margin-bottom: 16px; padding: 12px 15px;
  border-radius: 11px; font-size: 13px; line-height: 1.6;
  background: #fffbeb; color: #a16207; border: 1px solid #fde9b7;
}
#jsWarn b { font-weight: 700; }
body.js-ready #jsWarn { display: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 9px 16px; border-radius: 10px; font-size: 13.5px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; font-family: inherit; transition: .18s;
  background: #eef1f7; color: #313a4d; white-space: nowrap;
}
.btn:hover { background: #e4e8f2; }
.btn-pri { background: var(--a-pri); color: #fff; box-shadow: 0 6px 16px -8px rgba(91, 91, 214, .8); }
.btn-pri:hover { background: var(--a-pri-d); }
.btn-line { background: #fff; border-color: #dfe4ef; color: #34405a; }
.btn-line:hover { border-color: #c3c9db; background: #fafbff; }
.btn-danger { background: #fef2f2; color: var(--a-err); border-color: #fbd5d5; }
.btn-danger:hover { background: #fee2e2; }
.btn-sm { padding: 6px 11px; font-size: 12.5px; border-radius: 8px; }
.btn svg { width: 15px; height: 15px; }

/* ---------- 表格 ---------- */
.table { width: 100%; border-collapse: collapse; }
.table th {
  text-align: left; font-size: 11.5px; font-weight: 600; color: var(--a-muted);
  letter-spacing: .05em; text-transform: uppercase; padding: 11px 14px; background: #f8f9fd;
  border-bottom: 1px solid var(--a-line); white-space: nowrap;
}
.table td { padding: 12px 14px; border-bottom: 1px solid #f0f2f8; font-size: 13.3px; vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table tr:hover td { background: #fbfcff; }
.table .thumb { width: 62px; height: 38px; border-radius: 7px; object-fit: cover; border: 1px solid var(--a-line); background: #f1f3f9; display: grid; place-items: center; font-size: 10px; color: var(--a-muted2); }
.table .row-actions { display: flex; gap: 6px; justify-content: flex-end; }

.badge { display: inline-flex; align-items: center; gap: 5px; font-size: 11.5px; padding: 3px 9px; border-radius: 999px; background: #eef1f7; color: #4b566e; font-weight: 600; }
.badge.ok { background: #e9f9ef; color: #16803c; }
.badge.off { background: #f1f2f6; color: #79839a; }
.badge.warn { background: #fff7e6; color: #b45309; }

/* ---------- 上传 ---------- */
.uploader { display: flex; gap: 14px; align-items: flex-start; }
.uploader .preview {
  width: 104px; height: 104px; border-radius: 12px; border: 1px dashed #d5dbe9;
  background: #fafbff center/cover no-repeat; display: grid; place-items: center;
  font-size: 11.5px; color: var(--a-muted2); flex: 0 0 auto; overflow: hidden; text-align: center;
}
.uploader .preview.wide { width: 180px; height: 101px; border-radius: 10px; }
.uploader .preview img { width: 100%; height: 100%; object-fit: cover; }
.uploader .up-body { flex: 1; min-width: 0; }
.file-input { font-size: 12.5px; }

/* ---------- 重复行 ---------- */
.repeater { display: flex; flex-direction: column; gap: 10px; }
.rep-row {
  display: flex; gap: 9px; align-items: flex-start; padding: 10px; border: 1px solid var(--a-line);
  border-radius: 11px; background: #fbfcff;
}
.rep-row .rep-fields { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.rep-row .rep-fields.cols { flex-direction: row; }
.rep-row .rep-fields.cols > * { flex: 1; }
.rep-del {
  width: 30px; height: 30px; border-radius: 8px; border: 1px solid #f1d5d5; background: #fff;
  color: var(--a-err); cursor: pointer; flex: 0 0 auto; font-size: 15px; line-height: 1;
}
.rep-del:hover { background: #fef2f2; }
.rep-add { align-self: flex-start; }

/* ---------- 提示 ---------- */
.alert { padding: 12px 15px; border-radius: 11px; font-size: 13px; margin-bottom: 16px; display: flex; gap: 9px; align-items: flex-start; }
.alert.ok { background: #ecfdf3; color: #137a3a; border: 1px solid #c9f0d8; }
.alert.err { background: #fef2f2; color: #b91c1c; border: 1px solid #fbd5d5; }
.alert.info { background: #eef4ff; color: #1e4bb8; border: 1px solid #d5e3ff; }
.alert.warn { background: #fffbeb; color: #a16207; border: 1px solid #fde9b7; }
.alert b { font-weight: 700; }

/* ---------- 登录页 ---------- */
.login-wrap {
  min-height: 100vh; display: grid; place-items: center; padding: 24px;
  background: radial-gradient(700px 420px at 20% 0%, #2b2a6b 0%, transparent 60%),
              radial-gradient(620px 400px at 90% 100%, #0f4c5c 0%, transparent 62%),
              #0b0e18;
}
.login-card { width: min(392px, 100%); background: rgba(255, 255, 255, .97); border-radius: 18px; padding: 30px 28px; box-shadow: 0 40px 80px -30px rgba(0, 0, 0, .8); }
.login-logo { width: 46px; height: 46px; border-radius: 13px; background: linear-gradient(140deg, #7c6cff, #38bdf8); display: grid; place-items: center; color: #0b0e18; font-weight: 800; font-size: 19px; margin-bottom: 16px; }
.login-card h1 { font-size: 19px; font-weight: 750; letter-spacing: -.02em; }
.login-card .sub { font-size: 12.8px; color: var(--a-muted); margin: 6px 0 22px; }
.login-card .input { background: #f7f8fc; }
.login-foot { margin-top: 20px; text-align: center; font-size: 11.5px; color: var(--a-muted2); }
.login-wrap .alert { font-size: 12.5px; }

/* ---------- 空状态 ---------- */
.empty-box { text-align: center; padding: 44px 20px; color: var(--a-muted); font-size: 13px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .adm { grid-template-columns: 1fr; }
  .side { position: static; height: auto; flex-direction: column; }
  .side-nav { flex-direction: row; flex-wrap: wrap; }
  .side-nav .grp { display: none; }
  .side-foot { margin-top: 8px; }
  .content { padding: 16px; }
  .topbar { padding: 12px 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}