:root{
  --bg1:#241b6b; --bg2:#1c1554; --bg3:#130f3a;
  --panel:rgba(255,255,255,.055); --panel-border:rgba(255,255,255,.1);
  --panel-2:rgba(255,255,255,.04);
  --text:#f3f2fb; --text-dim:#a9a4cf; --text-dim2:#8781b3;
  --accent:#5b4be0; --accent2:#3f4bc4;
  --ok:#3ecf8e; --danger:#e0605a; --warn:#d08a3d;
  --radius:16px;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;}
html,body{height:100%;margin:0;}
body{
  background:linear-gradient(150deg,var(--bg1) 0%,var(--bg2) 55%,var(--bg3) 100%);
  color:var(--text);
  font-family:"Segoe UI",Roboto,-apple-system,BlinkMacSystemFont,Helvetica,Arial,sans-serif;
  min-height:100%;
}
h1,h2,h3{margin:0;}
button,input,textarea{font-family:inherit;}
a{color:inherit;}

.wrap{max-width:960px;margin:0 auto;padding:32px 20px 60px;}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:26px;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:12px;}
.brand .mark{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;}
.brand h1{font-size:1.2rem;letter-spacing:.2px;}
.brand .sub{color:var(--text-dim);font-size:.78rem;margin-top:2px;}

.btn{
  padding:10px 16px;border-radius:10px;border:1px solid var(--panel-border);
  background:var(--panel-2);color:var(--text);font-size:.86rem;font-weight:600;cursor:pointer;
}
.btn:hover{background:var(--panel);}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;color:#fff;}
.btn.primary:hover{filter:brightness(1.08);}
.btn.danger{border-color:rgba(224,96,90,.5);color:#ffb4b0;}
.btn.danger:hover{background:rgba(224,96,90,.12);}
.btn.small{padding:6px 11px;font-size:.76rem;}
.btn:disabled{opacity:.5;cursor:not-allowed;}

.card{
  background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);
  padding:20px 22px;margin-bottom:16px;
}
.card h3{font-size:1rem;margin-bottom:4px;}
.card .desc{color:var(--text-dim);font-size:.86rem;line-height:1.5;margin-top:8px;white-space:pre-wrap;}
.card .meta-row{display:flex;gap:14px;margin-top:12px;font-size:.76rem;color:var(--text-dim2);flex-wrap:wrap;}
.card .foot{display:flex;justify-content:flex-end;margin-top:14px;}

.empty-note{color:var(--text-dim2);font-size:.86rem;text-align:center;padding:40px 10px;}

.field{margin-bottom:14px;}
.field label{display:block;font-size:.8rem;color:var(--text-dim);margin-bottom:6px;font-weight:600;}
.field input,.field select,.field textarea{
  width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--panel-border);
  background:rgba(255,255,255,.05);color:var(--text);font-size:.9rem;
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-dim2);}
.field textarea{resize:vertical;min-height:70px;}
.field .hint{font-size:.72rem;color:var(--text-dim2);margin-top:5px;}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
@media (max-width:600px){.row2{grid-template-columns:1fr;}}

.err-msg{color:var(--danger);font-size:.82rem;min-height:1.1em;margin-top:6px;}
.ok-msg{color:var(--ok);font-size:.82rem;min-height:1.1em;margin-top:6px;}

/* modal token */
.overlay{
  position:fixed;inset:0;background:rgba(10,8,30,.72);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;padding:20px;z-index:50;
}
.overlay[hidden]{display:none;}
.modal{
  width:100%;max-width:380px;background:#1c1650;border:1px solid var(--panel-border);
  border-radius:18px;padding:26px 24px;box-shadow:0 24px 70px rgba(0,0,0,.45);
}
.modal h3{font-size:1.05rem;margin-bottom:4px;}
.modal .sub{color:var(--text-dim);font-size:.82rem;margin-bottom:16px;}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:16px;}

/* exam viewer */
.exam-viewer{position:fixed;inset:0;background:#0b0824;z-index:60;display:flex;flex-direction:column;}
.exam-viewer[hidden]{display:none;}
.exam-viewer .ev-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px;border-bottom:1px solid var(--panel-border);background:#150f42;flex-shrink:0;
}
.exam-viewer .ev-bar h3{font-size:.92rem;}
.exam-viewer iframe{flex:1;width:100%;border:none;background:#fff;}

/* login (admin) */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;}
.login-card{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--panel-border);border-radius:20px;padding:32px 28px;backdrop-filter:blur(14px);}
.login-card h1{text-align:center;font-size:1.2rem;}
.login-card .sub{text-align:center;color:var(--text-dim);font-size:.84rem;margin:6px 0 20px;}

/* badges */
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:999px;font-size:.7rem;font-weight:700;}
.badge.on{background:rgba(62,207,142,.15);color:var(--ok);}
.badge.off{background:rgba(255,255,255,.08);color:var(--text-dim);}

.section-title{font-size:.78rem;font-weight:800;letter-spacing:.05em;color:var(--text-dim);margin:26px 0 12px;text-transform:uppercase;}

.spinner{display:inline-block;width:14px;height:14px;border-radius:50%;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;animation:spin .7s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}