:root{--ink:#17232b;--muted:#66757f;--navy:#173f5f;--blue:#2376a6;--sky:#eaf4f8;--line:#dce5e9;--paper:#fff;--bg:#f3f6f7;--green:#19705b;--red:#b54048;--amber:#a96516;--shadow:0 18px 48px rgba(24,50,66,.1)}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg)}button,input,select{font:inherit}.hidden{display:none!important}.muted{color:var(--muted);line-height:1.7}.eyebrow{margin:0 0 6px;color:var(--blue);font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 76% 18%,#dbeef4 0,transparent 28%),linear-gradient(135deg,#f6fafb,#e9f1f3)}.login-card{width:min(440px,100%);padding:48px;border:1px solid rgba(255,255,255,.8);border-radius:28px;background:rgba(255,255,255,.92);box-shadow:var(--shadow)}.brand-mark{width:56px;height:56px;border-radius:18px;display:grid;place-items:center;background:var(--navy);color:white;font-weight:800;font-size:24px;margin-bottom:24px}.brand-mark.small{width:40px;height:40px;border-radius:12px;margin:0;font-size:18px}.login-card h1{font-size:30px;margin:4px 0 8px}.stack{display:grid;gap:18px;margin-top:30px}label{display:grid;gap:8px;font-size:13px;font-weight:650}input,select{border:1px solid var(--line);border-radius:10px;padding:11px 12px;background:white;color:var(--ink);outline:none}input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(35,118,166,.12)}button{border:0;border-radius:10px;padding:11px 16px;font-weight:700;cursor:pointer}.primary{background:var(--navy);color:#fff}.primary:hover{background:#0f324e}.secondary{background:var(--sky);color:var(--navy)}.ghost{background:transparent;color:inherit;border:1px solid var(--line)}.danger{color:var(--red)}.error{min-height:20px;color:var(--red);font-size:13px;margin:0}.app{min-height:100vh;display:grid;grid-template-columns:248px 1fr}.sidebar{position:sticky;top:0;height:100vh;padding:24px 18px;background:#142c3d;color:#e9f2f5;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;padding:4px 8px 28px}.brand strong,.brand small{display:block}.brand small{color:#a9bdc9;margin-top:3px}.sidebar nav{display:grid;gap:7px}.nav-btn{display:flex;width:100%;align-items:center;gap:11px;text-align:left;background:transparent;color:#b9cbd4;padding:12px 14px}.nav-btn.active,.nav-btn:hover{background:#21455e;color:white}.nav-dot{width:7px;height:7px;border:2px solid currentColor;border-radius:50%}.sidebar-foot{margin-top:auto;padding:18px 8px 0;border-top:1px solid rgba(255,255,255,.12);display:grid;gap:4px}.sidebar-foot small{color:#a9bdc9}.sidebar-foot button{margin-top:12px;border-color:rgba(255,255,255,.2)}.workspace{min-width:0}.topbar{height:100px;padding:22px 34px;display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.85);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;backdrop-filter:blur(14px)}.topbar h2{margin:0;font-size:23px}.exam-picker{display:flex;align-items:center;gap:10px;color:var(--muted)}.exam-picker select{min-width:220px}.content{padding:28px 34px 56px;max-width:1500px;margin:auto}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card,.panel{background:var(--paper);border:1px solid var(--line);border-radius:16px;box-shadow:0 6px 20px rgba(31,63,81,.04)}.card{padding:20px}.card small{color:var(--muted)}.card strong{display:block;font-size:30px;margin-top:10px}.grid-2{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(320px,.8fr);gap:18px;margin-top:18px}.panel{padding:22px;margin-top:18px;overflow:hidden}.grid-2>.panel{margin-top:0}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.panel h3{font-size:17px;margin:0}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.table-wrap{overflow:auto;margin:0 -22px -22px}.data-table{width:100%;border-collapse:collapse;white-space:nowrap;font-size:13px}.data-table th{position:sticky;top:0;background:#eef4f6;color:#425764;text-align:left;font-size:12px;letter-spacing:.02em}.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--line)}.data-table tbody tr:hover{background:#f8fbfc}.data-table .num{text-align:right;font-variant-numeric:tabular-nums}.data-table button{padding:6px 10px}.badge{display:inline-flex;align-items:center;border-radius:999px;padding:4px 9px;font-size:12px;background:var(--sky);color:var(--navy)}.badge.up{background:#e4f5ef;color:var(--green)}.badge.down{background:#fbe9ea;color:var(--red)}.bar-chart{height:340px;display:flex;align-items:flex-end;gap:15px;padding:24px 10px 38px;border-bottom:1px solid var(--line);position:relative;overflow-x:auto}.bar-group{height:100%;min-width:66px;display:flex;align-items:flex-end;gap:3px;position:relative}.bar{width:7px;min-height:2px;border-radius:4px 4px 0 0}.bar-label{position:absolute;bottom:-27px;left:0;width:100%;text-align:center;font-size:11px;color:var(--muted)}.legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}.legend span{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px}.legend i{width:9px;height:9px;border-radius:3px}.empty{padding:70px 20px;text-align:center;color:var(--muted)}.empty h3{color:var(--ink)}.upload-box{border:1px dashed #9bb8c7;border-radius:14px;padding:32px;background:#f8fbfc;text-align:center}.upload-box input{max-width:420px;margin:14px auto}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.notice{padding:14px 16px;border-radius:12px;background:#fff8e9;color:#7a531d;font-size:13px;line-height:1.6;margin-bottom:18px}.search{min-width:260px}.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.metric{padding:16px;border:1px solid var(--line);border-radius:12px}.metric small{display:block;color:var(--muted)}.metric strong{display:block;margin-top:8px;font-size:21px}.comment{font-size:15px;line-height:1.9;padding:18px 0}.subject-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:9px}.subject-cell{padding:12px;border-radius:12px;background:#f4f7f8;text-align:center}.subject-cell strong,.subject-cell small{display:block}.subject-cell small{margin-top:6px;color:var(--muted)}dialog{width:min(1020px,calc(100% - 36px));max-height:88vh;border:0;border-radius:20px;padding:0;box-shadow:0 24px 70px rgba(0,0,0,.25)}dialog::backdrop{background:rgba(14,30,40,.55);backdrop-filter:blur(3px)}#dialogContent{padding:30px;overflow:auto;max-height:88vh}.dialog-close{position:absolute;right:16px;top:14px;background:#edf2f4;font-size:20px;padding:5px 11px}.toast{position:fixed;right:24px;bottom:24px;z-index:30;max-width:380px;background:#173f5f;color:white;border-radius:12px;padding:13px 16px;opacity:0;transform:translateY(12px);pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:none}.toast.error{background:var(--red)}
.spaced{margin-top:24px}.filters{margin-bottom:20px}.button-link{display:inline-block;text-decoration:none;border-radius:10px;padding:10px 14px;font-weight:600}.name-list{white-space:normal;min-width:180px;max-width:300px;line-height:1.8}.trend-red{background:#ffc7ce;color:#7a1220;padding:4px 8px;border-radius:5px}.trend-yellow{background:#ffeb9c;color:#624c00;padding:4px 8px;border-radius:5px}.data-table input{max-width:130px}.panel-head{flex-wrap:wrap}.stack p{line-height:1.7}.bar-chart{gap:24px}.dialog-close{z-index:3}svg{max-width:100%;width:100%}
@media(max-width:1000px){.cards{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}.subject-grid{grid-template-columns:repeat(4,1fr)}}
@media(max-width:720px){.app{display:block}.sidebar{position:relative;height:auto;padding:14px}.brand{padding-bottom:12px}.sidebar nav{display:flex;overflow:auto}.nav-btn{width:auto;white-space:nowrap}.sidebar-foot{display:flex;align-items:center;gap:12px;padding-top:10px}.sidebar-foot button{margin-top:0;margin-left:auto}.topbar{height:auto;padding:16px;align-items:flex-start;gap:12px}.exam-picker{display:grid}.exam-picker select{min-width:150px;max-width:45vw}.content{padding:18px 14px}.cards{grid-template-columns:1fr 1fr}.form-grid,.metric-grid{grid-template-columns:1fr}.subject-grid{grid-template-columns:repeat(2,1fr)}}