*{box-sizing:border-box;margin:0;padding:0}:root{--ink: #14213d;--accent: #2563eb;--accent-dark: #1d4ed8;--bg: #f6f8fc;--card: #ffffff;--muted: #64748b;--danger: #dc2626;--ok: #16a34a;--radius: 14px;--shadow: 0 2px 10px rgba(20, 33, 61, .08)}body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--ink)}.landing{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(160deg,#eef4ff,#f6f8fc 45%,#fdf7ef)}.landing-nav{padding:20px 32px}.brand{font-size:17px;letter-spacing:.2px}.brand b{font-weight:700}.landing-hero{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px 16px 48px}.landing-hero h1{font-size:clamp(28px,4.5vw,44px);line-height:1.15;margin-bottom:14px}.landing-hero .sub{color:var(--muted);font-size:clamp(15px,2vw,18px);max-width:560px;margin-bottom:40px}.signin-cards{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}.signin-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 28px;width:300px;display:flex;flex-direction:column;align-items:center;gap:10px}.signin-icon{font-size:30px;width:64px;height:64px;border-radius:18px;display:flex;align-items:center;justify-content:center}.signin-card:nth-child(1) .signin-icon{background:linear-gradient(135deg,#dbeafe,#ede9fe)}.signin-card:nth-child(2) .signin-icon{background:linear-gradient(135deg,#dcfce7,#dbeafe)}.landing-hero h1 em{font-style:normal;background:linear-gradient(90deg,#2563eb,#7c3aed,#db2777);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.signin-card h2{font-size:20px}.signin-card p{color:var(--muted);font-size:14px;line-height:1.45;min-height:60px}.fineprint{margin-top:32px;color:var(--muted);font-size:13px;max-width:460px}.landing-footer{text-align:center;padding:18px;color:var(--muted);font-size:12px}.btn-primary{display:inline-flex;align-items:center;gap:8px;justify-content:center;background:linear-gradient(135deg,#2563eb,#7c3aed);color:#fff;border:none;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 2px 8px #2563eb47;text-decoration:none;transition:background .12s,transform .1s,box-shadow .12s}.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 4px 12px #2563eb52}.btn-primary:disabled{background:#a5b4d4;cursor:default;transform:none;box-shadow:none}.btn-secondary{display:inline-block;margin-top:12px;color:var(--accent);font-weight:600;text-decoration:none;font-size:14px}.btn-link{background:none;border:none;color:var(--accent);cursor:pointer;font-size:13px;text-decoration:none;white-space:nowrap}.btn-link.danger{color:var(--danger)}.shell{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(160deg,#eef4ff,#f4f6fb 55%,#fdf8f1)}.topbar{display:flex;justify-content:space-between;align-items:center;background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 1px #e6ecf4;padding:13px 28px;position:sticky;top:0;z-index:5}.topbar .brand{font-weight:700}.topbar .brand:first-line{background:linear-gradient(90deg,#2563eb,#7c3aed);-webkit-background-clip:text;background-clip:text}.topbar-right{display:flex;align-items:center;gap:6px}.topbar-right .muted{margin:0 8px}.topbar .btn-link{padding:7px 12px;border-radius:99px;transition:background .12s}.topbar .btn-link:hover{background:#eef4ff}.content{max-width:1040px;width:100%;margin:0 auto;padding:34px 24px 80px}.content h1{font-size:28px;letter-spacing:-.3px;margin-bottom:6px}.muted{color:var(--muted);font-size:14px}.card{background:var(--card);border:1px solid #e9eef6;border-radius:18px;box-shadow:0 4px 18px #14213d0d;padding:26px;margin-top:22px}.card.narrow{max-width:440px;text-align:center}.card h2{display:flex;align-items:center;gap:10px;font-size:16px;margin-bottom:16px}.card h2:before{content:"";width:4px;height:18px;border-radius:4px;flex:0 0 auto;background:linear-gradient(180deg,var(--accent),#7c3aed)}.card.narrow h2:before,.publish-modal h2:before{display:none}.card p{line-height:1.55}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}.two-col .card{margin-top:22px}@media(max-width:720px){.two-col{grid-template-columns:1fr}}.page-center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px;background:linear-gradient(160deg,#eef4ff,#f4f6fb 55%,#fdf8f1)}.stat-row{display:flex;gap:14px;margin-top:18px;flex-wrap:wrap}.stat{background:#fff;border:1px solid #e9eef6;border-radius:14px;padding:14px 22px;box-shadow:0 2px 10px #14213d0a;min-width:110px;border-top:3px solid transparent}.stat b{display:block;font-size:24px;letter-spacing:-.5px}.stat span{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.8px}.stat:nth-child(1){border-top-color:#2563eb}.stat:nth-child(1) b{color:#2563eb}.stat:nth-child(2){border-top-color:#7c3aed}.stat:nth-child(2) b{color:#7c3aed}.stat:nth-child(3){border-top-color:#16a34a}.stat:nth-child(3) b{color:#16a34a}.stat:nth-child(4){border-top-color:#ea580c}.stat:nth-child(4) b{color:#ea580c}.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin-top:24px}.tile{background:var(--card);border:1px solid #e9eef6;border-radius:16px;box-shadow:0 3px 12px #14213d0d;padding:22px 22px 20px;text-decoration:none;color:inherit;transition:transform .12s,box-shadow .12s,border-color .12s;position:relative;overflow:hidden}.tile:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#2563eb,#7c3aed)}.tile:nth-child(4n+2):before{background:linear-gradient(90deg,#7c3aed,#db2777)}.tile:nth-child(4n+3):before{background:linear-gradient(90deg,#059669,#2563eb)}.tile:nth-child(4n):before{background:linear-gradient(90deg,#ea580c,#db2777)}.tile:hover{transform:translateY(-3px);box-shadow:0 8px 22px #14213d1a;border-color:#c9d9f5}.tile.disabled{opacity:.55}.tile h3{font-size:15px;margin-bottom:6px}.tile p{color:var(--muted);font-size:13px}.row-form{display:flex;gap:10px;margin-top:8px;align-items:center;flex-wrap:wrap}.row-form input,.row-form select{width:auto;flex:1;min-width:120px}.row-form input[type=radio],.row-form input[type=checkbox]{flex:0 0 auto;min-width:0;width:auto}.row-form .btn-primary,.row-form .btn-link{flex:0 0 auto}input,select,textarea{font-family:inherit;font-size:14px;padding:10px 12px;border:1px solid #d7dee9;border-radius:10px;outline:none;background:#fff;width:100%}input:focus,select:focus,textarea:focus{border-color:var(--accent)}select{width:auto}textarea{resize:vertical;margin-bottom:10px}.data-table{width:100%;border-collapse:separate;border-spacing:0;font-size:14px}.data-table th{text-align:left;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.8px;padding:10px 12px;background:#f6f9fe}.data-table th:first-child{border-radius:10px 0 0 10px}.data-table th:last-child{border-radius:0 10px 10px 0}.data-table td{padding:13px 12px;border-bottom:1px solid #f0f4fa}.data-table tbody tr:last-child td{border-bottom:none}.data-table tbody tr{transition:background .1s}.data-table tbody tr:hover td{background:#f8faff}.role-pill{font-size:12px;font-weight:600;padding:3px 10px;border-radius:99px}.role-student{background:#e8f0fe;color:#1d4ed8}.role-teacher{background:#e7f7ee;color:#15803d}.role-superadmin{background:#fdeee0;color:#c2570b}.acc-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.acc-grid label,.content label{font-size:13px;color:var(--muted);display:flex;flex-direction:column;gap:6px}@media(max-width:720px){.acc-grid{grid-template-columns:1fr}}.title-input{font-size:22px;font-weight:700;flex:1 1 300px}.section-title{font-size:17px;font-weight:700;border-color:transparent;background:transparent;padding-left:0}.section-title:hover,.section-title:focus{border-color:#d7dee9;background:#fff;padding-left:12px}.question-card{border:1px solid #e6ecf4;border-radius:12px;padding:14px;margin-top:14px}.check-row{display:flex!important;flex-direction:row!important;align-items:center;gap:8px;padding:6px 0;font-size:14px!important;color:var(--ink)!important}.check-row input{width:auto!important;flex:0 0 auto}.publish-modal{border:2px solid var(--accent)}.exam-bg{background:linear-gradient(160deg,#eef4ff,#f2f4fa 55%,#fdf7ef);min-height:100vh}.exam-topbar2{position:sticky;top:0;z-index:10;background:#ffffffeb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 1px #e6ecf4}.exam-topbar-inner{max-width:820px;margin:0 auto;display:flex;align-items:center;gap:16px;padding:12px 20px}.exam-title{font-weight:700;font-size:15px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.exam-timer{font-size:20px;font-weight:800;font-variant-numeric:tabular-nums;background:var(--ink);color:#fff;border-radius:99px;padding:4px 16px}.exam-timer.urgent{background:var(--danger);animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.6}}.exam-progress-label{font-size:12px;color:var(--muted);white-space:nowrap}.exam-progress-track{height:4px;background:#e6ecf4}.exam-progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),#7c3aed);transition:width .4s ease;border-radius:0 4px 4px 0}.exam-content{max-width:820px;margin:0 auto;padding:28px 20px 80px;-webkit-user-select:none;user-select:none}.exam-content input,.exam-content textarea{-webkit-user-select:text;user-select:text}.exam-section-title{font-size:14px;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted);margin:30px 4px 12px}.exam-q{background:#fff;border-radius:16px;box-shadow:var(--shadow);padding:22px;margin-bottom:16px;border:2px solid transparent;transition:border-color .2s}.exam-q.answered{border-color:#d3e2fd}.exam-q-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:14px}.qnum{flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}.exam-q.answered .qnum{background:#16a34a}.q-prompt{font-size:16px;line-height:1.55;flex:1;margin:3px 0 0}.q-pts{flex:0 0 auto;font-size:12px;color:var(--muted);background:#f1f5fb;border-radius:99px;padding:4px 10px;margin-top:2px;white-space:nowrap}.choices{display:flex;flex-direction:column;gap:10px}.choices-row{flex-direction:row}.choices-row .choice{flex:1;justify-content:center}.choice{display:flex;align-items:center;gap:12px;padding:13px 16px;cursor:pointer;border:2px solid #e3e9f2;border-radius:12px;background:#fff;font-size:15px;transition:border-color .12s,background .12s,transform .06s}.choice:hover{border-color:#b6c8e8;background:#f8faff}.choice:active{transform:scale(.99)}.choice.selected{border-color:var(--accent);background:#eef4ff;font-weight:600}.choice input{display:none}.choice-letter{flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:2px solid #d3dced;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:var(--muted);transition:all .12s}.choice.selected .choice-letter{background:var(--accent);border-color:var(--accent);color:#fff}.short-answer{font-size:16px;padding:13px 16px;border-radius:12px}.essay-answer{font-size:15px;padding:13px 16px;border-radius:12px;line-height:1.6}.short-answer:focus,.essay-answer:focus{border-color:var(--accent);box-shadow:0 0 0 3px #dbe7fd}.exam-footer{text-align:center;margin-top:30px;display:flex;flex-direction:column;gap:10px;align-items:center}.btn-big{font-size:16px;padding:14px 40px;border-radius:12px}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#14213dd1;z-index:50;display:flex;align-items:center;justify-content:center;padding:16px}.score-big{font-size:26px;font-weight:800;margin-bottom:8px}.review-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:8px;background:#f8fafd;border-radius:10px;padding:12px 14px}.review-label{font-size:11px;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);margin-bottom:4px}.review-flag{border-color:#f5c6a5;background:#fffaf5}@media(max-width:720px){.review-grid{grid-template-columns:1fr}}.error-banner{margin-top:16px;background:#fdecea;color:var(--danger);padding:10px 14px;border-radius:10px;font-size:14px;border-left:4px solid var(--danger)}.ok-banner{margin-top:16px;background:#eaf7ef;color:var(--ok);padding:10px 14px;border-radius:10px;font-size:14px;border-left:4px solid var(--ok)}.spinner{width:28px;height:28px;border:3px solid #dbe4f0;border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:20px auto}@keyframes spin{to{transform:rotate(360deg)}}
