/* 麦子动学 —— 管理后台样式（终端式克制风格，与学习端共用令牌） */

.admin-login{min-height:100vh;display:grid;place-content:center;padding:24px}
.admin-login .card{width:min(400px,92vw);padding:26px}
.admin-login-brand{margin-bottom:18px}
.admin-login-brand .mono{color:var(--chalk);letter-spacing:.16em}
.admin-login-brand h1{font-size:24px;margin:6px 0 4px}

.admin{display:grid;grid-template-columns:212px 1fr;min-height:100vh}
.admin-rail{background:var(--ink);color:#D9E2F0;padding:20px 14px;display:flex;flex-direction:column;
  position:sticky;top:0;height:100vh}
.admin-nav{display:flex;flex-direction:column;gap:2px;margin-top:18px;flex:1;overflow:auto}
.admin-nav button{text-align:left;padding:9px 12px;border-radius:9px;border:none;background:transparent;
  color:#B9C6DC;font-size:13.5px;font-weight:600;cursor:pointer;transition:.15s}
.admin-nav button:hover{background:rgba(255,255,255,.07);color:#fff}
.admin-nav button.is-on{background:rgba(46,107,230,.24);color:#fff}
.admin-rail-foot{display:flex;flex-direction:column;gap:6px;font-size:12px;color:#9FB0CB}

.admin-main{display:flex;flex-direction:column;min-width:0}
.admin-top{display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:16px 24px;border-bottom:1px solid var(--line);background:rgba(242,245,250,.92);
  backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}
.admin-top h2{font-size:17px}
.admin-body{padding:20px 24px 60px;max-width:1280px;width:100%}

.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:auto;
  box-shadow:var(--shadow)}
table.grid-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
table.grid-table th{text-align:left;padding:11px 14px;background:#F7F9FD;color:var(--muted);
  font-size:12px;font-weight:700;border-bottom:1px solid var(--line);white-space:nowrap}
table.grid-table td{padding:11px 14px;border-bottom:1px solid var(--line-soft);vertical-align:middle}
table.grid-table tr:last-child td{border-bottom:0}
table.grid-table tr:hover td{background:#FAFCFF}
.cell-actions{display:flex;gap:6px;flex-wrap:wrap}
.cell-title b{display:block}
.cell-title small{color:var(--muted);font-size:12px}
.mono-cell{font-family:var(--font-mono);font-size:12px;color:var(--muted)}
.admin-toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.admin-toolbar .input{max-width:260px}

.ai-lab{display:grid;grid-template-columns:minmax(340px,.85fr) minmax(0,1.35fr);gap:16px;align-items:start}
.ai-preview{position:sticky;top:82px}
.ai-frame{width:100%;height:68vh;border:1px solid var(--line);border-radius:12px;background:#fff}
.ai-checks{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px}
.stat-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.stat-block b{display:block;font-size:26px;font-weight:800;letter-spacing:-.03em;color:var(--ink);
  font-variant-numeric:tabular-nums}
.stat-block span{font-size:12.5px;color:var(--muted)}
@media (min-width:1000px){.stat-grid{grid-template-columns:repeat(4,1fr)}}

/* 后台内容区用干净的底色，网格纸留给学习端 */
body.admin-page{background-image:none;background:#EEF2F8}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-grid .full{grid-column:1 / -1}
.checkline{display:flex;align-items:center;gap:8px;font-size:13.5px}
.license-row{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end}
.danger-zone{border:1px solid #F6D5D0;background:var(--alert-soft);border-radius:var(--radius);
  padding:14px;margin-top:16px}

.code-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.code-chip{font-family:var(--font-mono);font-size:12.5px;background:#F5F7FB;border:1px dashed var(--line);
  padding:6px 10px;border-radius:8px}

@media (max-width:900px){
  .admin{grid-template-columns:1fr}
  .admin-rail{position:static;height:auto;padding:14px}
  .admin-nav{flex-direction:row;overflow-x:auto;margin-top:12px;gap:6px}
  .admin-nav button{white-space:nowrap;background:rgba(255,255,255,.08)}
  .admin-rail-foot{flex-direction:row;align-items:center;flex-wrap:wrap;margin-top:12px}
  .admin-body{padding:16px 14px 60px}
  .admin-top{padding:12px 14px;flex-wrap:wrap}
  .form-grid{grid-template-columns:1fr}
  .ai-lab{grid-template-columns:1fr}
  .ai-preview{position:static}
  .ai-frame{height:62vh}
}