:root{--blue:#1769aa;--teal:#0f8b8d;--navy:#102a43;--line:#d9e2ec;--bg:#f4f7fb;--muted:#66788a;--ok:#16865d;--bad:#cf3f4f}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#172b4d;font-family:Tahoma,"Segoe UI",Arial,sans-serif}a{color:var(--blue);text-decoration:none}button,input,select,textarea{font:inherit}.top{height:70px;padding:0 28px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.top b{font-size:21px}.top nav{display:flex;gap:20px;align-items:center}.container{max-width:1180px;margin:30px auto;padding:0 18px}.center{min-height:100vh;display:grid;place-items:center}.auth{width:min(430px,calc(100% - 24px));background:#fff;padding:32px;border-radius:20px;border:1px solid var(--line);box-shadow:0 15px 40px #102a4315;text-align:center}.logo{width:55px;height:55px;border-radius:15px;background:linear-gradient(135deg,var(--blue),var(--teal));color:#fff;display:grid;place-items:center;margin:auto;font-weight:900}.auth label,.grid-form label{display:grid;gap:7px;text-align:right;margin:13px 0}.auth input,.grid-form input,.grid-form select,.grid-form textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:9px;background:#fff}.primary,.link,.submit{background:linear-gradient(135deg,var(--blue),var(--teal));color:#fff;border:0;border-radius:10px;padding:12px 20px;font-weight:800}.auth .primary{width:100%;margin:12px 0}.alert{padding:12px;background:#fff0f1;color:var(--bad);border-radius:9px}.success{padding:12px;background:#eaf8f2;color:var(--ok);border-radius:9px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin:22px 0 34px}.card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:22px}.card .badge{background:#e8f6f6;color:#087477;padding:7px 10px;border-radius:20px}.card p,.meta{color:var(--muted);line-height:1.7}.card .link{display:inline-block;margin-top:18px}.table{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:14px;margin-top:20px}table{width:100%;border-collapse:collapse}th,td{padding:13px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}th{background:#f8fafc}.exam-shell{max-width:1250px;margin:22px auto;padding:0 15px;display:grid;grid-template-columns:1fr 270px;gap:18px}.exam-panel,.side{background:#fff;border:1px solid var(--line);border-radius:17px}.exam-head{padding:18px 22px;display:flex;justify-content:space-between}.exam-head b{color:var(--teal)}.progress{height:7px;background:#e7edf3}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--blue))}.exam-body{padding:25px}.passage{background:#f8fafc;border-right:4px solid var(--teal);padding:16px;line-height:2;border-radius:10px;max-height:230px;overflow:auto}.hide{display:none}.option{width:100%;display:flex;gap:12px;align-items:center;text-align:right;padding:14px;margin:10px 0;border:2px solid var(--line);border-radius:12px;background:#fff}.option i{font-style:normal;width:36px;height:36px;border-radius:9px;background:#edf1f5;display:grid;place-items:center;font-weight:900}.option.selected{border-color:var(--blue);background:#eef7ff}.option.selected i{background:var(--blue);color:#fff}.exam-panel footer{border-top:1px solid var(--line);padding:17px;display:flex;justify-content:space-between}.exam-panel footer button{padding:10px 15px;border:1px solid var(--line);border-radius:9px}.marked{box-shadow:inset 0 -5px 0 #8b5cf6!important}.side{padding:18px;align-self:start}.nums{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:14px 0 20px}.nums button{height:37px;border:1px solid var(--line);background:#fff;border-radius:8px}.nums .answered{background:var(--blue);color:#fff}.nums .current{outline:3px solid #b9d9ef}.side .submit{width:100%}.timer{padding:9px 15px;border-radius:10px;background:#edf6ff;font-weight:900}.toast{position:fixed;left:20px;bottom:20px;background:var(--navy);color:#fff;padding:10px 16px;border-radius:9px;opacity:0}.toast.show{opacity:1}.result{max-width:850px}.score{background:#fff;border-radius:16px;padding:25px;text-align:center;margin:20px 0}.score b{font-size:42px;display:block;color:var(--ok)}.answer{background:#fff;border:1px solid var(--line);border-right:5px solid var(--bad);padding:17px;border-radius:12px;margin:12px 0;line-height:1.7}.answer.correct{border-right-color:var(--ok)}.green{color:var(--ok)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:20px 0}.stats>div{background:#fff;border:1px solid var(--line);border-radius:13px;padding:18px;text-align:center}.stats b{display:block;font-size:26px}.stats span{color:var(--muted)}.editor{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.editor summary{font-weight:800;cursor:pointer}.grid-form{display:grid;grid-template-columns:1fr 1fr;gap:0 15px;margin-top:15px}.grid-form .wide{grid-column:1/-1}.grid-form textarea{min-height:75px}@media(max-width:800px){.exam-shell{grid-template-columns:1fr}.side{order:-1}.nums{grid-template-columns:repeat(10,1fr)}.top{padding:0 13px}.top nav span{display:none}.stats{grid-template-columns:1fr}.grid-form{grid-template-columns:1fr}.grid-form .wide{grid-column:auto}}