:root{
  --bg:#f4f6fb; --surface:#fff; --surface-2:#f8fafc; --line:#e4e8f0; --text:#111827;
  --muted:#667085; --primary:#4f46e5; --primary-strong:#4338ca; --primary-soft:#eef2ff;
  --danger:#dc2626; --danger-soft:#fef2f2; --warn:#b45309; --warn-soft:#fffbeb;
  --ok:#047857; --ok-soft:#ecfdf5; --shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px rgba(16,24,40,.05);
  --radius:14px; --radius-sm:10px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font:14px/1.6 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
[hidden]{display:none!important}
.app{display:flex;min-height:100vh}
.sidebar{width:232px;flex:0 0 232px;background:#0f172a;color:#cbd5e1;padding:22px 14px;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh}
.brand{color:#fff;font-size:15px;font-weight:700;letter-spacing:.2px;padding:4px 10px 20px;line-height:1.45}
.brand small{display:block;color:#64748b;font-weight:400;font-size:10px;margin-top:5px;letter-spacing:1.4px}
.nav{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:#cbd5e1;font-size:13px;border:0;background:transparent;width:100%;text-align:left;transition:.15s}
.nav:hover{background:#1e293b;color:#fff}
.nav.active{background:var(--primary);color:#fff;font-weight:600}
.nav .ico{width:18px;text-align:center;opacity:.95}
.side-foot{margin-top:auto;padding:14px 10px 4px;border-top:1px solid #1e293b;color:#64748b;font-size:11px;line-height:1.7}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:62px;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;padding:0 24px;position:sticky;top:0;z-index:20}
.topbar h1{font-size:16px;margin:0;font-weight:650;flex:1;letter-spacing:.1px}
.icon-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:9px;width:36px;height:36px;align-items:center;justify-content:center}
.badge{font-size:11px;padding:3px 9px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-weight:600;white-space:nowrap}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.warn{background:var(--warn-soft);color:var(--warn)}
.content{padding:22px 26px 72px;max-width:1120px;width:100%;margin:0 auto}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.card-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.card-head h2{font-size:14px;margin:0;font-weight:650;flex:1}
.card-head .tag{font-size:11px;color:var(--muted);font-weight:400}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.grow{flex:1;min-width:160px}
input,select,textarea{padding:9px 11px;border:1px solid var(--line);border-radius:9px;background:#fff;outline:none;transition:.15s;max-width:100%}
textarea{width:100%;resize:vertical;min-height:96px;line-height:1.65}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 14px;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:9px;font-size:13px;font-weight:550;transition:.15s;white-space:nowrap}
.btn:hover{border-color:#c7cbd8;background:#fbfcfe}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-strong);border-color:var(--primary-strong)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--primary)}
.btn.danger{color:var(--danger);border-color:#fecaca;background:var(--danger-soft)}
.btn.sm{padding:6px 10px;font-size:12px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-row{display:flex;gap:8px;flex-wrap:wrap}
.segmented{display:inline-flex;background:#f1f5f9;border-radius:10px;padding:3px;gap:2px;margin-bottom:14px}
.segmented button{border:0;background:transparent;padding:7px 14px;border-radius:8px;font-size:13px;color:var(--muted)}
.segmented button.active{background:#fff;color:var(--text);font-weight:600;box-shadow:0 1px 3px rgba(16,24,40,.12)}
.muted{color:var(--muted);font-size:12px}
.hint{background:var(--primary-soft);border-left:3px solid var(--primary);padding:10px 13px;border-radius:0 8px 8px 0;font-size:12px;color:#3730a3;line-height:1.7}
.hint.warn{background:var(--warn-soft);border-left-color:var(--warn);color:#92400e}
.hr{height:1px;background:var(--line);margin:16px 0}
.empty{text-align:center;color:var(--muted);padding:36px 12px;font-size:13px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px}
.stat .k{font-size:12px;color:var(--muted)}
.stat .v{font-size:24px;font-weight:700;margin-top:4px;letter-spacing:-.5px}
.chip{display:inline-flex;align-items:center;gap:4px;font-size:11px;padding:3px 9px;border-radius:999px;background:#f1f5f9;color:#475569;border:1px solid var(--line);white-space:nowrap}
.chip.kp{background:var(--primary-soft);color:var(--primary);border-color:#dfe3ff}
.chip.warn{background:var(--warn-soft);color:var(--warn);border-color:#fde68a}
.chip.bad{background:var(--danger-soft);color:var(--danger);border-color:#fecaca}
.chip.ok{background:var(--ok-soft);color:var(--ok);border-color:#a7f3d0}
.chip button{border:0;background:transparent;color:inherit;padding:0 0 0 2px;font-size:12px;line-height:1}
.math{font-family:Georgia,"Times New Roman",serif;font-size:16px;background:var(--surface-2);padding:10px 12px;border-radius:9px;display:block;border:1px solid #eef1f6;color:#0f172a;overflow-x:auto;white-space:pre-wrap}

/* camera */
.camera{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#0b1220;position:relative;aspect-ratio:16/10;max-height:520px;display:flex;align-items:center;justify-content:center}
.camera video{width:100%;height:100%;object-fit:contain;background:#0b1220}
.camera .placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#94a3b8;text-align:center;padding:20px}
.camera .placeholder .big{font-size:34px;line-height:1}
.camera-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.camera-frame{position:absolute;inset:8%;border:2px dashed rgba(255,255,255,.55);border-radius:12px;pointer-events:none}
.preview{position:relative;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#0b1220}
.preview img{display:block;width:100%;max-height:520px;object-fit:contain}
.progress{height:8px;background:#e9edf5;border-radius:999px;overflow:hidden;margin-top:12px}
.progress>div{height:100%;width:0;background:linear-gradient(90deg,var(--primary),#818cf8);transition:width .2s}
.status-line{display:flex;align-items:center;gap:8px;margin-top:10px;font-size:12px;color:var(--muted);min-height:18px}
.spinner{width:14px;height:14px;border:2px solid #c7d2fe;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* drafts */
.draft-card{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px;background:#fff}
.draft-card.failed{background:var(--danger-soft);border-color:#fecaca}
.draft-card.partial{background:#fffdf7;border-color:#fde68a}
.draft-head{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.draft-no{font-weight:700;font-size:13px;min-width:30px}
.draft-image{width:100%;max-height:220px;object-fit:contain;background:#0b1220;border-radius:10px;margin-bottom:12px}
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:10px}
.field label{font-size:12px;color:var(--muted);font-weight:600}
.field-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.kp-box{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.kp-list{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.qitem{border:1px solid var(--line);border-radius:12px;padding:13px 15px;margin-bottom:9px;background:#fff;display:flex;gap:12px;align-items:flex-start}
.qitem:hover{border-color:#c7d2fe}
.qitem .body{flex:1;min-width:0}
.qitem .title{font-size:13px;font-weight:600;margin-bottom:6px;line-height:1.5}
.review-card{text-align:center;padding:30px 22px}
.review-card .math{font-size:20px;padding:22px;text-align:left;margin:18px 0}
.qbtns{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:18px}
.qbtn{border:1px solid var(--line);background:#fff;border-radius:11px;padding:13px 8px;font-weight:600;font-size:14px;transition:.15s}
.qbtn small{display:block;font-weight:400;font-size:11px;color:var(--muted);margin-top:4px}
.qbtn:hover{border-color:var(--primary);background:var(--primary-soft)}
.qbtn[data-q="1"]:hover{background:var(--danger-soft);border-color:var(--danger)}
.qbtn kbd{font:10px monospace;background:#f1f5f9;border:1px solid var(--line);border-radius:4px;padding:1px 4px;margin-left:4px}
.tabs{display:flex;gap:6px;margin-bottom:14px;border-bottom:1px solid var(--line)}
.tab{border:0;background:transparent;padding:9px 14px;color:var(--muted);font-size:13px;border-bottom:2px solid transparent}
.tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
table{width:100%;border-collapse:collapse;font-size:12px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;background:var(--surface-2)}

/* toast + modal */
.toast{position:fixed;right:24px;bottom:24px;background:#0f172a;color:#fff;padding:11px 16px;border-radius:10px;font-size:13px;box-shadow:0 12px 36px rgba(0,0,0,.24);opacity:0;transform:translateY(10px);transition:.2s;pointer-events:none;z-index:90;max-width:min(420px,calc(100vw - 32px))}
.toast.show{opacity:1;transform:translateY(0)}
.toast.error{background:#991b1b}
.toast.success{background:#065f46}
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.55);display:flex;align-items:center;justify-content:center;padding:18px;z-index:80}
.modal{background:#fff;border-radius:16px;box-shadow:0 24px 64px rgba(0,0,0,.24);width:min(560px,100%);max-height:88vh;overflow:auto}
.modal header{padding:16px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px}
.modal header h3{margin:0;font-size:15px;flex:1}
.modal .body{padding:18px}
.modal footer{padding:14px 18px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px}
.modal .x{border:0;background:transparent;font-size:18px;color:var(--muted);line-height:1}

/* login */
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:22px;background:radial-gradient(1200px 600px at 80% -10%,#e0e7ff 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#dbeafe 0,transparent 55%),var(--bg)}
.login-card{width:min(460px,100%);background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 24px 70px rgba(16,24,40,.14);padding:26px}
.login-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.logo{width:42px;height:42px;border-radius:13px;background:linear-gradient(135deg,var(--primary),#8b5cf6);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:17px}
.login-brand h1{font-size:17px;margin:0}
.login-brand p{margin:2px 0 0;font-size:12px;color:var(--muted)}
.login .field{margin-bottom:12px}
.login .consent{display:flex;gap:8px;align-items:flex-start;font-size:12px;color:var(--muted);line-height:1.6;margin:12px 0 16px}
.login .consent input{margin-top:2px}
.login .btn.primary{width:100%;padding:11px}

@media(max-width:900px){
  .app{flex-direction:column}
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:60;transform:translateX(-100%);transition:transform .2s;height:100vh}
  .sidebar.open{transform:translateX(0)}
  .icon-btn{display:inline-flex}
  .topbar{padding:0 14px}
  .content{padding:16px 14px 60px}
  .qbtns{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  .card{padding:14px;border-radius:12px}
  .topbar h1{font-size:14px}
  .badge{display:none}
  .camera{aspect-ratio:3/4}
}