*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:linear-gradient(145deg,#0b1a2e 0%,#1a3349 100%);min-height:100vh;color:#fff}
.hidden{display:none!important}
button{font-family:inherit}
input,select,textarea{font-family:inherit;width:100%;padding:10px 13px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:12px;color:#fff;font-size:14px;outline:none;transition:.2s}
input:focus,select:focus,textarea:focus{border-color:#f9a825;box-shadow:0 0 0 3px rgba(249,168,37,.25)}
option{background:#1a3349;color:#fff}
textarea{resize:vertical;min-height:80px}
label{display:block;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;background:linear-gradient(135deg,#f9a825,#f57f17);border:none;border-radius:40px;font-size:14px;font-weight:700;color:#0b1a2e;cursor:pointer;transition:.2s;box-shadow:0 6px 18px rgba(249,168,37,.25)}
.btn:hover{transform:scale(1.02);box-shadow:0 10px 26px rgba(249,168,37,.4)}
.btn:active{transform:scale(.98)}
.btn.secondary{background:rgba(255,255,255,.08);color:#fff;box-shadow:none;border:1px solid rgba(255,255,255,.1)}
.btn.danger{background:linear-gradient(135deg,#ef5350,#c62828);color:#fff}
.btn.small{padding:5px 11px;font-size:12px;border-radius:20px}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none}
.card{background:rgba(0,0,0,.3);border-radius:22px;padding:22px;margin-bottom:20px;border:1px solid rgba(255,255,255,.05)}
.card-title{font-size:15px;font-weight:600;color:#aac7e6;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.card-title i{font-style:normal;background:#f9a825;color:#0b1a2e;border-radius:30px;padding:0 12px;font-size:12px;line-height:22px}
.row{display:flex;flex-wrap:wrap;gap:12px 16px}
.col{flex:1 1 180px;min-width:140px}
.notice{font-size:12px;color:rgba(255,255,255,.5);line-height:1.7}
.mt8{margin-top:8px}.mt12{margin-top:12px}.mt20{margin-top:20px}
.flex{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.badge{display:inline-block;font-size:11px;padding:2px 9px;border-radius:20px;background:rgba(255,255,255,.08);color:rgba(255,255,255,.6);margin-right:5px;white-space:nowrap}
.level-1{color:#81c784}.level-2{color:#ffd54f}.level-3{color:#ffb74d}.level-4{color:#ff8a65}.level-5{color:#ef5350}
.serial{color:#f9a825;font-weight:700}
.highlight-record{background:rgba(249,168,37,.16)!important;border-left:3px solid #f9a825}
.record-item{padding:10px 12px;border-radius:12px;background:rgba(255,255,255,.03);margin-bottom:7px;display:flex;flex-wrap:wrap;gap:8px 14px;align-items:baseline}
.record-item.deleted{opacity:.55;text-decoration:line-through;text-decoration-color:rgba(239,83,80,.6)}
.record-item .time{font-size:12px;color:rgba(255,255,255,.45)}
.record-item .ops{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:10px 8px;text-align:left;border-bottom:1px solid rgba(255,255,255,.06);vertical-align:top}
th{color:rgba(255,255,255,.45);font-weight:500;font-size:12px}
td{color:rgba(255,255,255,.85)}
tr:hover td{background:rgba(255,255,255,.02)}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.65);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal{background:#13293d;border:1px solid rgba(255,255,255,.1);border-radius:26px;padding:24px;max-width:600px;width:100%;box-shadow:0 30px 70px rgba(0,0,0,.8);position:relative;max-height:90vh;overflow:auto}
.modal h3{font-size:20px;margin-bottom:16px;color:#fff}
.modal .close{position:absolute;top:12px;right:16px;background:none;border:none;color:rgba(255,255,255,.4);font-size:22px;cursor:pointer}
.modal .close:hover{color:#fff}
.key-box{background:rgba(249,168,37,.1);border:1px dashed rgba(249,168,37,.4);border-radius:14px;padding:14px;margin:12px 0;font-size:14px;line-height:1.7}
.key-code{font-family:monospace;font-size:18px;color:#f9a825;font-weight:700;letter-spacing:1px}
.login-view{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login-card{max-width:560px;width:100%;background:rgba(255,255,255,.07);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.08);border-radius:36px;padding:40px 30px;box-shadow:0 30px 60px rgba(0,0,0,.7);text-align:center}
.login-card h1{font-size:28px;margin-bottom:10px}
.login-card p{color:rgba(255,255,255,.55);font-size:14px;line-height:1.8;margin-bottom:22px}
.main-view{display:flex;min-height:100vh}
.sidebar{width:220px;flex-shrink:0;background:rgba(0,0,0,.28);border-right:1px solid rgba(255,255,255,.06);padding:24px 14px;position:sticky;top:0;height:100vh;overflow:auto}
.sidebar .brand{font-size:18px;font-weight:800;color:#fff;margin-bottom:4px;padding:0 10px}
.sidebar .sub{font-size:11px;color:rgba(255,255,255,.35);padding:0 10px;margin-bottom:22px}
.nav-item{padding:11px 14px;border-radius:12px;color:rgba(255,255,255,.65);cursor:pointer;font-size:14px;margin-bottom:4px;transition:.2s;display:flex;align-items:center;gap:8px}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:#f9a825;color:#0b1a2e;font-weight:700}
.content{flex:1;padding:24px;max-width:1200px;margin:0 auto;width:100%}
.topbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.topbar h2{font-size:20px}
.mobile-tabs{display:none}
.stat-bar{height:10px;background:rgba(255,255,255,.08);border-radius:10px;overflow:hidden;margin:6px 0}
.stat-bar>div{height:100%;border-radius:10px;transition:.3s}
.quiz-question{padding:14px;border-radius:14px;background:rgba(255,255,255,.03);margin-bottom:12px;border-left:3px solid rgba(249,168,37,.3)}
.quiz-question .q-title{font-weight:600;margin-bottom:10px;line-height:1.6}
.quiz-option{display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:14px;color:rgba(255,255,255,.8);cursor:pointer}
.quiz-option input{width:auto;margin-top:3px}
.msg-item{padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.04);margin-bottom:10px;cursor:pointer;border-left:3px solid rgba(249,168,37,.4);transition:.2s}
.msg-item:hover{background:rgba(249,168,37,.08)}
.msg-item .time{font-size:11px;color:rgba(255,255,255,.4);margin-top:5px}
@media(max-width:899px){
  .main-view{display:block}
  .sidebar{width:100%;height:auto;position:static;display:none}
  .mobile-tabs{display:flex;gap:8px;flex-wrap:wrap;padding:14px;background:rgba(0,0,0,.28);border-bottom:1px solid rgba(255,255,255,.06);position:sticky;top:0;z-index:20}
  .mobile-tabs .nav-item{margin:0;padding:8px 12px;font-size:13px}
  .content{padding:16px}
  .col{flex:1 1 100%}
}