@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{font-family:'DM Sans',sans-serif;color:#172b36;background:#f3f6f8;font-size:16px;--ink:#172b36;--muted:#607780;--line:#dfe7eb;--brand:#007e78;--nav:#112f36;--soft:#e6f4f0}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:4px}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}a{color:var(--brand)}h1,h2,h3,.brand{font-family:Manrope,sans-serif}h1{font-size:2rem;letter-spacing:-1px;margin:6px 0 10px}h2{font-size:1.25rem;margin:0 0 18px}h3{font-size:1rem;margin:0 0 10px}p{line-height:1.65}small,.muted{color:var(--muted)}small{font-size:.8125rem}.shell{display:grid;grid-template-columns:245px 1fr;min-height:100vh}.sidebar{background:var(--nav);color:white;padding:30px 18px;display:flex;flex-direction:column;gap:28px;position:sticky;top:0;height:100vh}.brand{font-weight:800;font-size:1.5rem;padding:0 12px}.brand em{color:#76d9bc;font-style:normal}.brand small{display:block;font-family:'DM Sans';font-weight:400;font-size:.8125rem;color:#b9ccce;margin-top:7px;letter-spacing:.4px}.nav-title{color:#8da9ae;font-size:.75rem;letter-spacing:1.8px;padding:0 14px;margin:0 0 10px}.nav{display:grid;gap:5px}.nav button{border:0;background:none;color:#c3d3d6;padding:12px 14px;display:flex;align-items:center;gap:12px;border-radius:8px;text-align:left;font-size:.875rem}.nav button.active{background:#24515a;color:#fff;font-weight:700}.nav button:hover{background:#20434b}.nav svg{width:19px;height:19px}.main{min-width:0}.topbar{background:white;border-bottom:1px solid var(--line);padding:17px 36px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:.875rem}.profile{display:flex;align-items:center;gap:10px}.avatar{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#e2eeed;color:#21685e;font-weight:700}.content{padding:32px 36px 50px;max-width:1600px;margin:auto}.row{display:flex;align-items:center;justify-content:space-between;gap:16px}.wrap{flex-wrap:wrap}.intro{margin-bottom:28px}.eyebrow{font-size:.75rem;letter-spacing:1.7px;font-weight:700;color:var(--brand)}.intro p{margin:0;color:var(--muted)}.btn{border:1px solid var(--line);background:white;padding:11px 17px;border-radius:8px;color:var(--ink);font-weight:600;font-size:.875rem;display:inline-flex;align-items:center;justify-content:center;gap:9px;text-decoration:none}.btn.primary{background:var(--brand);border-color:var(--brand);color:white}.btn.danger{color:#b83c43}.btn svg{width:17px;height:17px}.btn:hover{filter:brightness(.96)}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:17px;margin:24px 0}.stat{background:white;border:1px solid var(--line);padding:21px;border-radius:12px}.stat .num{font-family:Manrope;font-size:2rem;font-weight:800;margin:16px 0 3px}.stat .label{color:#536f77;font-size:.875rem}.stat-icon{width:33px;height:33px;padding:7px;border-radius:8px;background:#e6f4f0;color:var(--brand)}.grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(260px,1fr);gap:22px}.card{background:white;border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:22px}.card .card{margin:0}.card-head{margin-bottom:20px}.card-head h2{margin:0}.badge{display:inline-block;padding:5px 9px;border-radius:6px;background:var(--soft);color:#257366;font-size:.75rem;font-weight:600;white-space:nowrap}.badge.amber{background:#fff2d9;color:#956317}.badge.gray{background:#edf1f4;color:#677982}.demo-notice{border:1px solid #d8e8e3;background:#edf7f3;color:#41685e;padding:12px 16px;border-radius:8px;font-size:.875rem;margin-bottom:24px;line-height:1.5}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;text-align:left;font-size:.875rem}th{background:#f7f9fa;color:#6b7d86;font-weight:500;font-size:.8125rem;padding:13px 12px;white-space:nowrap}td{border-bottom:1px solid #eef2f4;padding:17px 12px}td strong{display:block;margin-bottom:5px}tr:last-child td{border-bottom:0}.empty{text-align:center;padding:42px 20px;color:var(--muted)}.toolbar{display:flex;gap:12px;margin-bottom:20px;flex-wrap:wrap}.toolbar input{flex:1;min-width:180px}.field{display:grid;gap:7px;margin-bottom:17px;font-size:.875rem}.field label{font-weight:600}input,select,textarea{width:100%;border:1px solid #ccdadd;background:white;color:var(--ink);padding:11px 12px;border-radius:7px;min-width:0}textarea{resize:vertical;min-height:90px}input[type=checkbox],input[type=radio]{width:auto;accent-color:var(--brand)}.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}.check{display:flex;gap:10px;align-items:center;font-size:.875rem;line-height:1.5}.check input{flex:none}.question{border-bottom:1px solid var(--line);padding:20px 0}.question:first-child{padding-top:0}.question:last-child{border:0}.question p{white-space:pre-wrap;margin:12px 0}.question img,.exam-image{max-width:100%;max-height:300px;object-fit:contain;display:block;margin:14px 0;border-radius:8px}.q-top{display:flex;align-items:center;gap:9px}.q-number{font-weight:700;color:#789299;font-size:.875rem}.options{display:grid;grid-template-columns:1fr 1fr;gap:8px;color:#536f77;font-size:.875rem}.option{padding:11px 14px;background:#f6f8f9;border-radius:7px}.option.correct{background:#eaf5ef;color:#23715c}.quick{display:flex;gap:14px;align-items:center;padding:16px 0;border-bottom:1px solid #edf2f4;text-decoration:none;color:var(--ink)}.quick:last-child{border:0}.quick svg{width:36px;height:36px;padding:8px;border-radius:9px;background:#f0f6f6;color:var(--brand)}.quick p{margin:2px 0;font-size:.8125rem;color:var(--muted)}.quick strong{font-size:.875rem}.strip{display:flex;gap:10px;align-items:center;margin:16px 0}.strip .track{flex:1;height:7px;background:#edf2f4;border-radius:8px;overflow:hidden}.strip .fill{height:100%;background:#15978c;border-radius:8px}.drop{padding:38px 24px;text-align:center;border:2px dashed #bdcfce;border-radius:12px;background:#f6faf9;margin-bottom:20px}.drop input{border:0;background:none;max-width:420px}.drop h2{margin:12px 0 8px}.steps{display:flex;gap:10px;flex-wrap:wrap;font-size:.8125rem;color:var(--muted);margin-bottom:22px}.steps span{padding:8px 12px;background:#eef4f3;border-radius:6px}.login{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}.login-brand{background:var(--nav);color:white;padding:70px 10%;display:flex;flex-direction:column;justify-content:center}.login-brand h1{font-size:3rem;line-height:1.2;max-width:480px;letter-spacing:-1.6px;margin-top:60px}.login-brand p{color:#bad2d4;max-width:440px}.login-form{display:grid;place-items:center;padding:32px}.login-form>div{width:100%;max-width:420px}dialog{width:min(640px,94vw);max-height:90vh;border:0;border-radius:14px;padding:28px;color:var(--ink);box-shadow:0 25px 100px #102b3655}dialog::backdrop{background:#112f3677;backdrop-filter:blur(3px)}dialog h2{margin-top:0}dialog .actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:13px 20px;border-radius:9px;background:#173e44;color:white;box-shadow:0 5px 30px #112f3633;z-index:20;max-width:90vw;display:none;font-size:.875rem}.exam-shell{max-width:1080px;margin:30px auto;padding:0 24px}.exam-layout{display:grid;grid-template-columns:1fr 250px;gap:22px;margin-top:25px}.answer{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:15px;margin:10px 0;cursor:pointer}.answer:has(input:checked){border-color:var(--brand);background:#edf8f3}.number-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.number-grid button{aspect-ratio:1;border:1px solid var(--line);border-radius:6px;background:white}.number-grid button.done{background:#def3e9;border-color:#bbdfd0}.number-grid button.current{outline:2px solid var(--brand)}.timer{font-family:Manrope;font-size:1.5rem;font-weight:800;color:var(--brand)}.score{font-size:4.5rem;color:var(--brand);font-weight:800;font-family:Manrope}.mobile-title{display:none}.loading{padding:40px}.link-text{overflow-wrap:anywhere;font-size:.875rem}.busy{opacity:.65;pointer-events:none}footer{color:#789098;text-align:center;font-size:.75rem;margin-top:34px}
.drop>svg{width:40px;height:40px;color:var(--brand)}
.subject-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:10px 0 24px}.subject-card{border:1px solid var(--line);background:#f7faf9;border-radius:10px;padding:20px;text-align:left;color:var(--ink)}.subject-card strong,.subject-card small{display:block}.subject-card small{margin-top:8px}.subject-card.selected{border:2px solid var(--brand);background:#e6f4f0}.fullscreen-gate{position:fixed;inset:0;background:#112f36;z-index:10000;display:grid;place-items:center;padding:24px}.fullscreen-gate .card{max-width:540px;text-align:center}.actions{display:flex;justify-content:flex-end;gap:12px;margin-top:20px}[hidden]{display:none!important}#type-fields .options{margin-top:12px}#live-monitor h2{margin:0}.question .options{margin-top:12px}
@media(max-width:1100px){.shell{grid-template-columns:205px 1fr}.content{padding:25px}.topbar{padding:16px 25px}.grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.brand{font-size:1.3rem}}@media(max-width:700px){.shell{display:block}.sidebar{position:static;height:auto;padding:18px;gap:18px}.brand small,.nav-title{display:none}.nav{display:flex;overflow:auto;gap:5px}.nav button{white-space:nowrap;padding:10px}.nav svg{display:none}.brand{padding:0}.topbar{padding:14px 18px}.content{padding:24px 16px}.intro.row{align-items:flex-start;flex-direction:column}h1{font-size:1.65rem}.stats{gap:10px}.stat{padding:15px}.card{padding:18px}.two,.options{grid-template-columns:1fr}.login{grid-template-columns:1fr}.login-brand{padding:28px}.login-brand h1{font-size:1.8rem;margin:20px 0 0}.login-brand p{display:none}.login-form{padding:28px 20px}.exam-layout{grid-template-columns:1fr}.exam-shell{padding:0 14px}.exam-layout aside{order:-1}.number-grid{grid-template-columns:repeat(10,1fr)}.exam-layout aside .card{margin:0}.profile small{display:none}.row{gap:10px}dialog{padding:20px}.timer{font-size:1.2rem}}

/* Landing branding and viewport-bounded desktop navigation. */
.landing-logo{display:block;width:128px;height:128px;object-fit:contain;flex-shrink:0;margin:0 0 18px 12px}.login-student{margin-top:24px}
@media(min-width:701px){.sidebar{height:100vh;height:100dvh;min-height:0;overflow:hidden;gap:18px}.sidebar>.brand{flex:0 0 auto}.sidebar>.sidebar-menu{min-height:0;overflow-y:auto;padding-bottom:16px;flex:1}}
@media(max-width:700px){.landing-logo{width:96px;height:96px;margin-left:0}}
.sidebar-menu,.sidebar .nav{scrollbar-width:thin;scrollbar-color:#527f85 var(--nav)}
.sidebar-menu::-webkit-scrollbar,.sidebar .nav::-webkit-scrollbar{width:8px;height:8px}
.sidebar-menu::-webkit-scrollbar-track,.sidebar .nav::-webkit-scrollbar-track{background:var(--nav)}
.sidebar-menu::-webkit-scrollbar-thumb,.sidebar .nav::-webkit-scrollbar-thumb{background:#527f85;border:2px solid var(--nav);border-radius:8px}
.sidebar-menu::-webkit-scrollbar-thumb:hover,.sidebar .nav::-webkit-scrollbar-thumb:hover{background:#76a4a6}

/* Student exam: shrink grid/flex content instead of horizontal scrolling. */
.exam-shell{width:100%;min-height:100vh;min-height:100dvh}
.exam-layout{grid-template-columns:minmax(0,1fr) 250px}
.exam-layout>*{min-width:0}
.exam-shell .card,.exam-shell header>*,.exam-shell .row>*{min-width:0}
.exam-shell h2,.exam-shell h3,.exam-shell p,.exam-shell small,.exam-shell .answer{overflow-wrap:anywhere}
.exam-shell .answer span{min-width:0}
.exam-shell .answer input{flex:0 0 auto}
.exam-shell .row{flex-wrap:wrap}
.exam-shell .badge{white-space:normal}
.exam-shell .exam-image{height:auto;max-width:100%}
.exam-shell .truth-table{table-layout:fixed}
.exam-shell .truth-table th:first-child{width:60%;white-space:normal}
.exam-shell .truth-table th,.exam-shell .truth-table td{padding:10px 6px;overflow-wrap:anywhere;white-space:normal}
.exam-shell .number-grid{grid-template-columns:repeat(auto-fit,minmax(32px,1fr))}
.exam-shell .number-grid button{min-width:0;padding:5px}
.review-answer{white-space:pre-wrap;overflow-wrap:anywhere}
.review-wrong{color:#b42318}
.review-correct{color:#167047}
@media(max-width:700px){
 .exam-shell{margin:0 auto;padding:14px 10px}
 .exam-layout{grid-template-columns:minmax(0,1fr);gap:14px;margin-top:16px}
 .exam-layout aside{order:0}
 .exam-shell .card{padding:16px}
 .exam-shell h2{font-size:1.1rem}
 .exam-shell header .brand{font-size:1.25rem}
 .exam-shell .btn{padding:10px 12px;white-space:normal}
 .exam-shell .answer{padding:12px;gap:9px;align-items:flex-start}
 .exam-shell .answer input{margin-top:4px}
 .fullscreen-gate .card{min-width:0;width:100%;overflow-wrap:anywhere}
}