/* ==== Theme tokens ==================================================== */
:root{
  --bg:#f3f5f9;--surface:#fff;--surface-2:#f8fafc;--border:#e4e8ef;--text:#0f172a;--muted:#64748b;
  --primary:#2563eb;--primary-hover:#1d4ed8;--primary-soft:#dbeafe;--ok:#15803d;--ok-soft:#dcfce7;
  --warn:#b45309;--warn-soft:#fef3c7;--bad:#b91c1c;--bad-soft:#fee2e2;--info:#1d4ed8;--info-soft:#dbeafe;
  --purple:#6d28d9;--purple-soft:#ede9fe;--shadow:0 1px 2px rgba(15,23,42,.06),0 4px 16px rgba(15,23,42,.05);
  --radius:12px;--sidebar:248px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,
  "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
[data-theme="dark"]{
  --bg:#0b1220;--surface:#111a2b;--surface-2:#162238;--border:#1f2c44;--text:#e5ebf5;--muted:#8b9bb4;
  --primary:#3b82f6;--primary-hover:#60a5fa;--primary-soft:#1e3a8a;--ok:#4ade80;--ok-soft:#14532d;
  --warn:#fbbf24;--warn-soft:#78350f;--bad:#f87171;--bad-soft:#7f1d1d;--info:#93c5fd;--info-soft:#1e3a8a;
  --purple:#c4b5fd;--purple-soft:#4c1d95;--shadow:0 1px 2px rgba(0,0,0,.4),0 6px 20px rgba(0,0,0,.35);
}
/* ==== Base ============================================================ */
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:15px/1.5 var(--font);background:var(--bg);color:var(--text);transition:background .2s,color .2s}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3{margin:0 0 .5rem;line-height:1.25}h1{font-size:1.5rem}h2{font-size:1.15rem}h3{font-size:1rem}
p{margin:.25rem 0 .75rem}code,pre,.mono{font-family:var(--mono);font-size:.9em}
pre{background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:.85rem 1rem;overflow:auto;margin:0}
hr{border:0;border-top:1px solid var(--border);margin:1rem 0}
.muted{color:var(--muted)}.small{font-size:.85rem}.right{text-align:right}.center{text-align:center}.hidden{display:none!important}
.flex{display:flex;gap:.75rem;align-items:center}.between{justify-content:space-between}.wrap{flex-wrap:wrap}
.mt{margin-top:1rem}.mb{margin-bottom:1rem}.grow{flex:1}
/* ==== Layout ========================================================== */
.app{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar);flex:none;background:var(--surface);border-right:1px solid var(--border);
  position:sticky;top:0;height:100vh;display:flex;flex-direction:column;padding:1rem .75rem;transition:transform .2s}
.brand{display:flex;align-items:center;gap:.6rem;padding:.4rem .6rem 1rem;font-weight:700;font-size:1.1rem}
.brand svg{width:30px;height:30px}
.nav a{display:flex;align-items:center;gap:.7rem;padding:.6rem .75rem;border-radius:8px;color:var(--text);font-weight:500}
.nav a svg{width:19px;height:19px;color:var(--muted);flex:none}
.nav a:hover{background:var(--surface-2);text-decoration:none}
.nav a.active{background:var(--primary-soft);color:var(--primary)}.nav a.active svg{color:var(--primary)}
.nav .sep{margin:.6rem .75rem;border-top:1px solid var(--border)}
.sidebar-foot{margin-top:auto;padding:.5rem .75rem}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:.75rem;padding:.75rem 1.5rem;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}
.content{padding:1.5rem;max-width:1200px;width:100%}
.footer{padding:1rem 1.5rem;color:var(--muted);font-size:.85rem;margin-top:auto}
.burger{display:none;background:none;border:0;padding:.4rem;cursor:pointer;color:var(--text)}
.backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:29}
@media(max-width:900px){
  .sidebar{position:fixed;left:0;top:0;z-index:30;transform:translateX(-100%)}
  .sidebar.open{transform:none}.backdrop.show{display:block}.burger{display:inline-flex}
  .content{padding:1rem}.topbar{padding:.6rem 1rem}
}
/* ==== Components ====================================================== */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem;margin-bottom:1.25rem}
.card-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem;gap:.5rem;flex-wrap:wrap}
.grid{display:grid;gap:1rem}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}
@media(max-width:1000px){.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-4,.grid-2,.grid-3{grid-template-columns:1fr}}
.stat{display:flex;align-items:center;gap:1rem}
.stat .icon{width:44px;height:44px;border-radius:10px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);flex:none}
.stat .icon svg{width:22px;height:22px}.stat .label{color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
.stat .value{font-size:1.4rem;font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.55rem 1rem;border-radius:8px;border:1px solid transparent;
  font:inherit;font-weight:600;cursor:pointer;background:var(--primary);color:#fff;transition:background .15s;white-space:nowrap}
.btn:hover{background:var(--primary-hover);text-decoration:none}.btn:disabled{opacity:.6;cursor:not-allowed}
.btn.secondary{background:var(--surface-2);color:var(--text);border-color:var(--border)}.btn.secondary:hover{background:var(--border)}
.btn.danger{background:var(--bad);color:#fff}.btn.ghost{background:transparent;color:var(--primary)}.btn.sm{padding:.35rem .7rem;font-size:.85rem}
.btn.block{width:100%}.btn svg{width:16px;height:16px}
.icon-btn{background:none;border:1px solid var(--border);border-radius:8px;width:36px;height:36px;display:inline-grid;place-items:center;cursor:pointer;color:var(--text)}
.icon-btn:hover{background:var(--surface-2)}.icon-btn svg{width:18px;height:18px}
label{display:block;font-weight:600;font-size:.85rem;margin-bottom:.3rem}
.field{margin-bottom:1rem}.help{color:var(--muted);font-size:.8rem;margin-top:.3rem}
input,select,textarea{width:100%;padding:.6rem .8rem;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font:inherit;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
input[type=checkbox]{width:auto}.err{color:var(--bad);font-size:.82rem;margin-top:.3rem}
.errorlist{list-style:none;padding:0;margin:.3rem 0 0;color:var(--bad);font-size:.82rem}
.alert{padding:.75rem 1rem;border-radius:8px;margin-bottom:1rem;border:1px solid transparent;display:flex;justify-content:space-between;gap:1rem}
.alert.success{background:var(--ok-soft);color:var(--ok)}.alert.error{background:var(--bad-soft);color:var(--bad)}
.alert.info{background:var(--info-soft);color:var(--info)}.alert.warning{background:var(--warn-soft);color:var(--warn)}
.alert button{background:none;border:0;color:inherit;cursor:pointer;font-size:1.1rem;line-height:1}
.badge{display:inline-block;padding:.15rem .55rem;border-radius:999px;font-size:.75rem;font-weight:600}
.badge.ok{background:var(--ok-soft);color:var(--ok)}.badge.warn{background:var(--warn-soft);color:var(--warn)}
.badge.bad{background:var(--bad-soft);color:var(--bad)}.badge.info{background:var(--info-soft);color:var(--info)}
.badge.purple{background:var(--purple-soft);color:var(--purple)}.badge.muted{background:var(--surface-2);color:var(--muted)}
.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:.65rem .75rem;text-align:left;border-bottom:1px solid var(--border);vertical-align:middle}
th{color:var(--muted);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}
tbody tr:hover{background:var(--surface-2)}td.trunc{max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pager{display:flex;gap:.4rem;justify-content:center;margin-top:1rem;flex-wrap:wrap}
.pager a,.pager span{padding:.35rem .7rem;border:1px solid var(--border);border-radius:6px;font-size:.85rem}
.pager span.cur{background:var(--primary);color:#fff;border-color:var(--primary)}
.tabs{display:flex;gap:.25rem;border-bottom:1px solid var(--border);margin-bottom:1rem;overflow-x:auto}
.tabs button{background:none;border:0;padding:.55rem .9rem;font:inherit;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}
.tabs button.active{color:var(--primary);border-color:var(--primary)}
.method{font-family:var(--mono);font-size:.75rem;font-weight:700;padding:.2rem .5rem;border-radius:6px;background:var(--ok-soft);color:var(--ok)}
.endpoint{font-family:var(--mono);background:var(--surface-2);padding:.25rem .5rem;border-radius:6px;word-break:break-all}
.copy-row{display:flex;gap:.5rem;align-items:center}.copy-row code{flex:1;overflow:auto;padding:.5rem .7rem;background:var(--surface-2);border-radius:8px;border:1px solid var(--border)}
.pay-option{display:flex;align-items:center;gap:.8rem;padding:.9rem 1rem;border:2px solid var(--border);border-radius:10px;cursor:pointer;margin-bottom:.6rem}
.pay-option:has(input:checked){border-color:var(--primary);background:var(--primary-soft)}
.pay-option input{width:auto;margin:0}
.qr{background:#fff;padding:.75rem;border-radius:10px;display:inline-block;max-width:240px}.qr svg{width:100%;height:auto;display:block}
.dropdown{position:relative}.dropdown-menu{display:none;position:absolute;right:0;top:calc(100% + 6px);background:var(--surface);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);min-width:200px;padding:.4rem;z-index:40}
.dropdown.open .dropdown-menu{display:block}.dropdown-menu a,.dropdown-menu button{display:flex;align-items:center;gap:.6rem;width:100%;padding:.55rem .7rem;border-radius:6px;color:var(--text);background:none;border:0;font:inherit;cursor:pointer;text-align:left}
.dropdown-menu a:hover,.dropdown-menu button:hover{background:var(--surface-2);text-decoration:none}
.lang-form select{width:auto;padding:.4rem .6rem;font-size:.85rem}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.9rem}
/* ==== Auth pages ====================================================== */
.auth{min-height:100vh;display:grid;place-items:center;padding:1.5rem;background:radial-gradient(1200px 600px at 10% -10%,var(--primary-soft),transparent),var(--bg)}
.auth .card{width:100%;max-width:440px;padding:2rem}.auth .brand{justify-content:center;padding-bottom:1.25rem}
.auth-actions{position:fixed;top:1rem;right:1rem;display:flex;gap:.5rem;align-items:center}
.progress{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;background:var(--primary)}
.skeleton{animation:pulse 1.2s infinite;background:var(--surface-2);border-radius:6px;height:1em}
@keyframes pulse{50%{opacity:.5}}
@media print{.sidebar,.topbar,.footer{display:none}}