:root{--navy:#102a43;--blue:#1769aa;--gold:#f6c453;--bg:#f3f6fa;--card:#fff;--muted:#61758a;--danger:#b42318;--ok:#147d64;--line:#d9e2ec;--shadow:0 10px 30px rgba(16,42,67,.08)}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--navy);background:var(--bg);line-height:1.55}.topbar{background:#fff;border-bottom:1px solid var(--line);padding:14px max(18px,calc((100% - 1200px)/2));display:flex;align-items:center;justify-content:space-between;gap:20px;position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:12px}.brand small{display:block;color:var(--muted)}.logo{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;font-weight:800}.topbar nav{display:flex;gap:16px;align-items:center}.topbar a{text-decoration:none;color:var(--blue);font-weight:700}.danger-link{color:var(--danger)!important}.container{max-width:1200px;margin:28px auto;padding:0 18px}.hero{background:linear-gradient(135deg,var(--navy),#1f5f8b);color:#fff;padding:36px;border-radius:22px;box-shadow:var(--shadow);display:grid;grid-template-columns:1.4fr 1fr;gap:25px;align-items:center}.hero h1{font-size:clamp(28px,5vw,52px);line-height:1.05;margin:0 0 16px}.hero p{color:#e5edf5;font-size:18px}.login-grid,.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.card h2,.card h3{margin-top:0}.role-card{padding:25px}.role-card .icon{font-size:35px}.btn,button,input[type=submit]{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:0;border-radius:10px;padding:11px 17px;background:var(--blue);color:#fff;font-weight:800;text-decoration:none;cursor:pointer}.btn.secondary{background:#e8f1f8;color:var(--navy)}.btn.gold{background:var(--gold);color:#382b00}.btn.danger{background:var(--danger)}.btn.small{padding:7px 10px;font-size:13px}.form-group{margin-bottom:16px}label{display:block;font-weight:750;margin-bottom:6px}input,select,textarea{width:100%;padding:11px 12px;border:1px solid #bcccdc;border-radius:9px;background:#fff;font:inherit}textarea{min-height:110px}.row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;margin:20px 0}.stat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px}.stat strong{display:block;font-size:28px}.stat span{color:var(--muted)}table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden}th,td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#edf3f8;font-size:13px;text-transform:uppercase;letter-spacing:.04em}.table-wrap{overflow:auto;border-radius:14px;border:1px solid var(--line)}.badge{display:inline-block;padding:5px 9px;border-radius:999px;background:#e8f1f8;color:#174a75;font-size:12px;font-weight:800}.badge.ok{background:#e7f6f1;color:#0f6b56}.badge.bad{background:#feeceb;color:#a3261b}.actions{display:flex;gap:8px;flex-wrap:wrap}.sidebar-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:22px}.sidebar{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;height:max-content;position:sticky;top:92px}.sidebar a{display:block;padding:10px 12px;border-radius:9px;color:var(--navy);text-decoration:none;font-weight:700}.sidebar a:hover{background:#edf3f8}.question{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px;margin-bottom:16px}.option{display:flex;align-items:flex-start;gap:10px;padding:10px;border:1px solid var(--line);border-radius:10px;margin-top:8px}.option input{width:auto;margin-top:4px}.exam-head{display:flex;justify-content:space-between;gap:15px;align-items:center;position:sticky;top:73px;background:var(--bg);padding:10px 0;z-index:10}.timer{font-size:24px;font-weight:900;color:var(--danger)}.flash{max-width:1200px;margin:15px auto;padding:12px 18px;border-radius:10px}.flash.success{background:#e7f6f1;color:#0f6b56}.flash.error{background:#feeceb;color:#a3261b}.empty{text-align:center;color:var(--muted);padding:30px}.chapter-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-height:380px;overflow:auto;padding:5px}.chapter-item{border:1px solid var(--line);border-radius:10px;padding:10px}.chapter-item label{display:flex;gap:9px;margin:0}.chapter-item input{width:auto}.result-correct{border-left:5px solid var(--ok)}.result-wrong{border-left:5px solid var(--danger)}footer{text-align:center;color:var(--muted);padding:35px 15px}@media(max-width:800px){.hero,.login-grid,.grid,.row,.stats,.sidebar-layout{grid-template-columns:1fr}.sidebar{position:static}.topbar{align-items:flex-start}.topbar nav{font-size:13px;gap:8px;flex-wrap:wrap;justify-content:flex-end}.chapter-list{grid-template-columns:1fr}.exam-head{top:88px}}
.notice{padding:12px 14px;border:1px solid #bfd8ea;border-radius:10px;background:#eef7fd;color:#174a75}.error-list{padding:14px;border:1px solid #f4b8b4;border-radius:10px;background:#fff4f3;color:#8f221a}.filter-grid{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:12px;align-items:end}.filter-button{padding-bottom:1px}.inline-reset{display:flex;gap:8px;margin-top:8px;min-width:260px}.inline-reset input{min-width:150px}details summary{list-style:none}details summary::-webkit-details-marker{display:none}@media(max-width:800px){.filter-grid{grid-template-columns:1fr}.inline-reset{min-width:0;flex-direction:column}}

/* ==================== EXAM INTERFACE (screenshot-style quiz) ==================== */
.exam-banner{display:flex;justify-content:space-between;align-items:center;gap:18px;background:linear-gradient(135deg,#0b2545,#1769aa);color:#fff;border-radius:16px;padding:20px 24px;box-shadow:var(--shadow);margin-bottom:18px}
.exam-banner h2{margin:0 0 4px;color:#7ef29d;font-size:22px}
.exam-banner span{color:#c7d7e8;font-size:14px}
.timer-pill{background:#fff;color:#0b2545;font-weight:900;font-size:22px;min-width:110px;text-align:center;padding:10px 22px;border-radius:999px;box-shadow:0 4px 14px rgba(0,0,0,.25);letter-spacing:.03em}
.timer-pill.danger{background:#ffe3e0;color:#b42318;animation:pulse 1s infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}
.exam-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:20px}
.exam-stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center;box-shadow:var(--shadow)}
.exam-stat strong{display:block;font-size:30px;color:var(--navy)}
.exam-stat span{color:var(--muted);font-size:13px}
.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:start}
.exam-main{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow)}
.exam-progress{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.q-counter{color:var(--blue);font-weight:900;font-size:19px}
.q-badge{background:#e6f6fb;color:#0b6b84;border:1px solid #bfe8f2;border-radius:999px;padding:6px 14px;font-size:13px;font-weight:700}
.q-text{margin:4px 0 16px;font-size:19px;line-height:1.45}
.q-option{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:11px;cursor:pointer;background:#fff;transition:background .15s,border-color .15s;font-weight:600}
.q-option:hover{background:#f4f9fd;border-color:#9fc3de}
.q-option.selected{background:#eaf3fb;border-color:var(--blue);box-shadow:0 0 0 1px var(--blue) inset}
.q-option input{width:auto;margin:0;flex:none}
.exam-buttons{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.exam-buttons .btn:disabled{opacity:.45;cursor:not-allowed}
.exam-submit-row{margin-top:14px}
.exam-palette-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow);position:sticky;top:92px}
.exam-palette-box h3{margin:0 0 12px;font-size:17px}
.exam-palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.pal-btn{padding:9px 0;border-radius:9px;border:1px solid #f0b8b3;background:#ffecea;color:#b42318;font-weight:800;font-size:14px;cursor:pointer}
.pal-btn.answered{background:#e2f6ec;border-color:#9fd9bd;color:#0f6b56}
.pal-btn.marked{background:#fff2d8;border-color:#f2cf87;color:#8a5a00}
.pal-btn.current{outline:3px solid var(--blue);outline-offset:-1px;background:#fff;color:var(--navy);border-color:var(--blue)}
.pal-legend{margin-top:14px;display:grid;gap:7px;font-size:13px;color:var(--muted)}
.pal-legend span{display:flex;align-items:center;gap:8px}
.dot{width:13px;height:13px;border-radius:4px;display:inline-block;flex:none}
.dot-current{background:#fff;border:2px solid var(--blue)}
.dot-answered{background:#bfe8d3}
.dot-marked{background:#f6d78d}
.dot-blank{background:#ffd4cf}
@media(max-width:900px){.exam-layout{grid-template-columns:1fr}.exam-palette-box{position:static}.exam-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.exam-banner{flex-direction:column;align-items:flex-start}.timer-pill{align-self:flex-end}}