:root{--purple:#4A1259;--brand:#6E2585;--brand-dark:#4b175e;--gold:#F5C518;--cream:#f7f3e8;--paper:#fffdf8;--ink:#211a27;--muted:#6f6674;--line:#dfd7e3;--good:#127a53;--warn:#a55a00;--bad:#ad2d38;--shadow:0 12px 32px rgba(45,16,55,.09);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--cream);font-size:16px;line-height:1.5}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;min-width:320px;background:radial-gradient(circle at 10% 0%,#fff 0,#f7f3e8 42%,#f1e8f3 100%)}button,input,select,textarea{font:inherit}button,a{touch-action:manipulation}.site-header{height:76px;background:var(--purple);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,5vw,72px);box-shadow:0 2px 12px #24102b33}.brand{color:#fff;text-decoration:none;display:flex;align-items:center;gap:12px}.brand-logo{width:44px;height:44px;object-fit:contain;background:#fff;border-radius:8px;padding:3px}.brand strong,.brand small{display:block}.brand strong{letter-spacing:.02em;font-size:1rem}.brand small{color:#e9ddef;font-size:.8rem}.header-pill{border:1px solid #ffffff40;border-radius:999px;padding:7px 13px;font-size:.8rem;color:#f9eeb7}.page-wrap{max-width:1220px;margin:auto;padding:clamp(28px,6vw,68px) clamp(18px,4vw,56px)}.entry-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:22px;align-items:stretch}.hero-copy{padding:8px 8px 14px}.hero-copy h1,.quiz-topbar h1,.admin-toolbar h1,.state-view h1{font-size:clamp(2rem,4vw,3.3rem);line-height:1.06;letter-spacing:-.045em;margin:.25rem 0 1rem;color:var(--purple)}.hero-copy .lede{font-size:1.12rem;max-width:56ch;color:#514956}.eyebrow{font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.14em;color:var(--brand);margin:0 0 .45rem}.card{background:rgba(255,253,248,.92);border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow)}.identity-card{grid-column:2;grid-row:1 / span 2;padding:clamp(22px,4vw,38px)}.card-heading h2,.instruction-card h2,.checklist-card h2{margin:.1rem 0 .6rem;font-size:1.35rem;color:var(--purple)}.card-heading p{color:var(--muted);margin:.4rem 0 1.1rem}.identity-card label,.card>label,.set-editor label{display:block;font-size:.84rem;font-weight:750;margin:16px 0 6px;color:var(--purple)}input,select,textarea{width:100%;border:1px solid #cfc3d5;background:#fffefa;color:var(--ink);border-radius:9px;padding:11px 13px;outline:0}input:focus,select:focus,textarea:focus,button:focus-visible,a:focus-visible{outline:3px solid #f5c51899;outline-offset:2px;border-color:var(--brand)}textarea{resize:vertical;min-height:120px}.button{border:1px solid transparent;border-radius:9px;padding:10px 16px;font-weight:760;cursor:pointer;display:inline-flex;justify-content:center;align-items:center;text-decoration:none;transition:.15s ease;min-height:44px}.button:hover{transform:translateY(-1px)}.button:disabled{cursor:not-allowed;opacity:.48;transform:none}.button-primary{background:var(--brand);color:#fff}.button-primary:hover{background:var(--brand-dark)}.button-secondary{background:#fffaf0;color:var(--purple);border-color:#ccbcd2}.button-ghost{background:transparent;color:#fff;border-color:#fff6}.button-small{padding:7px 11px;font-size:.83rem;min-height:36px}.button-wide{width:100%;margin-top:19px}.button-finish{background:var(--gold);color:#362600;width:100%;margin-top:20px}.field-error{color:var(--bad);font-size:.86rem;margin:10px 0 0}.notice{margin:18px 0;padding:12px 15px;background:#fff4d3;border-left:4px solid var(--gold);border-radius:7px;color:#5c4612}.notice.error{background:#fee9ea;border-left-color:var(--bad);color:#70222c}.notice.success{background:#e5f6ef;border-left-color:var(--good);color:#075336}.stat-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}.stat-chip{padding:10px 14px;border:1px solid #ddcbdf;background:#fff9fc;border-radius:11px;color:var(--purple);font-weight:700}.stat-chip small{display:block;font-size:.7rem;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:700}.instruction-card,.checklist-card{padding:24px}.section-heading{display:flex;align-items:center;gap:11px}.icon-badge{display:grid;place-items:center;width:31px;height:31px;border-radius:50%;background:var(--gold);color:#4f3900;font-weight:900}.download-link{display:flex;align-items:center;gap:9px;color:var(--brand);font-weight:800;text-decoration:none;margin:20px 0}.download-link span{font-size:1.5rem;line-height:.7}.muted{color:var(--muted)}.small{font-size:.84rem}.check-list{list-style:none;padding:0;margin:1rem 0 0}.check-list li{position:relative;padding:0 0 12px 28px;color:#514956}.check-list li::before{content:'✓';position:absolute;left:0;color:var(--good);font-weight:900}.quiz-topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:20px}.quiz-topbar h1{font-size:2rem;margin:0}.timer-card{background:var(--purple);border-radius:13px;color:#fff;padding:11px 18px;text-align:right;min-width:130px}.timer-label{display:block;color:#e7d5ec;font-size:.7rem;text-transform:uppercase;letter-spacing:.1em}.timer-card strong{font-size:1.7rem;letter-spacing:.04em}.timer-card.is-low{background:var(--bad)}.progress-panel{padding:16px 19px;margin-bottom:20px}.progress-copy{display:flex;justify-content:space-between;gap:10px;margin-bottom:8px}.save-status{font-size:.85rem;color:var(--good)}.save-status.saving{color:var(--warn)}.save-status.error{color:var(--bad)}.progress-track{height:7px;background:#e8dfeb;border-radius:99px;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--gold);width:0;transition:width .2s ease}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px}.question-card{padding:clamp(21px,4vw,39px)}.question-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-weight:750;font-size:.9rem}.difficulty-badge{padding:5px 11px;border-radius:99px;background:#e7f5ec;color:var(--good);font-size:.76rem}.difficulty-badge.difficult{background:#fbeddb;color:#a55a00}.question-card h2{font-size:clamp(1.2rem,2vw,1.5rem);line-height:1.42;margin:25px 0 19px;color:var(--ink);white-space:pre-wrap}.sql-block{background:#28202d;color:#f7f3e8;border-radius:10px;padding:16px;overflow:auto;white-space:pre-wrap;font:400 .9rem/1.55 ui-monospace,SFMono-Regular,Consolas,monospace;margin:0 0 21px}.choices{border:0;margin:0;padding:0;display:grid;gap:11px}.choice{position:relative}.choice input{position:absolute;opacity:0;width:1px;height:1px}.choice label{display:flex;align-items:flex-start;gap:13px;padding:15px 16px;border:1px solid #d7cbd9;border-radius:11px;cursor:pointer;min-height:59px;background:#fffefa;transition:.15s}.choice label::before{content:'';width:19px;height:19px;border:2px solid #a996ad;border-radius:50%;flex:0 0 19px;margin-top:1px}.choice input:checked+label{border-color:var(--brand);background:#f9effc;box-shadow:0 0 0 2px #6e258522}.choice input:checked+label::before{border:6px solid var(--brand)}.choice input:focus-visible+label{outline:3px solid #f5c51899;outline-offset:2px}.question-actions{display:flex;justify-content:space-between;gap:12px;margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}.navigator{padding:20px;height:max-content;position:sticky;top:20px}.navigator-heading{display:flex;justify-content:space-between;align-items:start}.navigator h2{margin:0;color:var(--purple)}.count-badge{display:grid;place-items:center;background:var(--gold);border-radius:99px;min-width:30px;height:30px;font-weight:850}.question-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:19px 0}.grid-button{aspect-ratio:1;border:1px solid #d7cbd9;background:#fffefa;color:var(--muted);border-radius:7px;cursor:pointer;font-weight:750}.grid-button.is-current{background:var(--purple);color:#fff;border-color:var(--purple)}.grid-button.is-answered:not(.is-current){background:#e4f5ec;color:var(--good);border-color:#9ed0b7}.legend{display:flex;flex-wrap:wrap;gap:12px;font-size:.72rem;color:var(--muted)}.legend span{display:flex;align-items:center;gap:5px}.legend-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#d7cbd9}.legend-dot.answered{background:var(--good)}.legend-dot.current{background:var(--purple)}.state-view{max-width:680px;margin:9vh auto;padding:clamp(28px,6vw,58px);text-align:center}.state-view h1{font-size:2.5rem}.state-icon{width:68px;height:68px;border-radius:50%;display:grid;place-items:center;background:#e4f5ec;color:var(--good);font-size:2rem;font-weight:900;margin:0 auto 20px}.receipt{display:grid;grid-template-columns:1fr 1fr;text-align:left;gap:10px;margin:28px 0;padding:17px;border-radius:10px;background:#fbf5ff;border:1px solid #e1d1e6}.receipt dt{font-size:.75rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}.receipt dd{margin:0;font-weight:700;color:var(--purple)}.explanation{margin-top:20px;padding:14px 16px;border-left:4px solid var(--gold);background:#fff8df}.confirm-dialog,.attempt-dialog{border:0;border-radius:16px;padding:0;width:min(500px,calc(100% - 30px));box-shadow:0 20px 70px #24102b55;background:var(--paper)}dialog::backdrop{background:#24102b88}.confirm-dialog form,.attempt-dialog form{padding:30px}.confirm-dialog h2{color:var(--purple);margin:.2rem 0 .7rem}.dialog-close{position:absolute;top:10px;right:13px;border:0;background:transparent;font-size:1.7rem;color:var(--muted);cursor:pointer}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:23px}
/* admin */.admin-wrap{max-width:1380px;margin:auto;padding:clamp(24px,4vw,50px) clamp(18px,4vw,55px)}.admin-header-actions,.toolbar-actions{display:flex;align-items:center;gap:10px}.login-shell{max-width:850px;margin:10vh auto;display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center}.login-brand h1{font-size:3rem;line-height:1.05;color:var(--purple);margin:.3rem 0 1rem}.login-brand>p:last-child{max-width:48ch;color:var(--muted);font-size:1.08rem}.login-card{padding:28px}.login-card h2{color:var(--purple);margin-top:0}.admin-toolbar{display:flex;justify-content:space-between;gap:22px;align-items:end}.admin-toolbar h1{font-size:2.2rem;margin:0}.compact-label{font-size:.8rem;color:var(--muted);font-weight:700}.toolbar-actions select{min-width:180px}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:26px 0 22px;overflow:auto}.tab{border:0;background:transparent;color:var(--muted);padding:12px 16px;cursor:pointer;font-weight:750;white-space:nowrap;border-bottom:3px solid transparent}.tab.is-active{color:var(--purple);border-color:var(--gold)}.admin-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-bottom:20px}.admin-stat{padding:18px 20px}.admin-stat small{display:block;color:var(--muted);font-weight:700;text-transform:uppercase;font-size:.7rem;letter-spacing:.07em}.admin-stat strong{font-size:1.8rem;color:var(--purple);display:block;margin-top:6px}.admin-grid-two{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.9fr);gap:20px}.table-card{padding:21px;min-width:0}.inline-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.table-card h2{margin:0 0 16px;color:var(--purple);font-size:1.2rem}.table-scroll{overflow-x:auto}.table-card table{width:100%;border-collapse:collapse;font-size:.88rem}.table-card th{text-align:left;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}.table-card td,.table-card th{padding:11px 8px;border-bottom:1px solid #e9e2e9;vertical-align:middle}.table-card tbody tr:last-child td{border-bottom:0}.status-pill{display:inline-flex;padding:4px 8px;border-radius:99px;font-size:.72rem;font-weight:800;white-space:nowrap}.status-pill.submitted{background:#e4f5ec;color:var(--good)}.status-pill.in_progress{background:#fff4d3;color:#845600}.status-pill.timed_out{background:#fee9ea;color:var(--bad)}.status-pill.not-started{background:#eeeaf0;color:var(--muted)}.table-action{border:0;background:transparent;color:var(--brand);font-weight:800;cursor:pointer;text-decoration:underline}.form-row{display:flex;gap:16px;flex-wrap:wrap;margin-top:18px}.radio-label{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:.88rem}.radio-label input{width:auto}.preview-box{border:1px dashed #cbb9d0;padding:13px;border-radius:8px;margin-top:16px;font-size:.86rem;max-height:180px;overflow:auto}.preview-ok{color:var(--good)}.preview-bad{color:var(--bad)}.form-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:21px;flex-wrap:wrap}.switch-label{display:flex!important;align-items:center;gap:9px;margin:18px 0!important;color:var(--ink)!important;font-weight:650!important}.switch-label input{position:absolute;opacity:0;width:1px}.switch{width:40px;height:22px;background:#c8bdca;border-radius:99px;position:relative;transition:.15s}.switch::after{content:'';position:absolute;width:18px;height:18px;top:2px;left:2px;background:#fff;border-radius:50%;transition:.15s}.switch-label input:checked+.switch{background:var(--brand)}.switch-label input:checked+.switch::after{left:20px}.switch-label input:focus-visible+.switch{outline:3px solid #f5c51899}.sets-layout{display:grid;grid-template-columns:290px minmax(0,1fr);gap:20px}.set-list-card{padding:18px}.set-list{display:grid;gap:8px}.set-list-item{display:block;text-align:left;width:100%;border:1px solid var(--line);background:#fffefa;border-radius:9px;padding:12px;cursor:pointer}.set-list-item.is-selected{border-color:var(--brand);background:#f9effc}.set-list-item strong,.set-list-item small{display:block}.set-list-item strong{color:var(--purple)}.set-list-item small{color:var(--muted);margin-top:3px}.set-editor{padding:clamp(20px,3vw,32px);min-height:550px}.empty-state{text-align:center;padding:70px 20px;color:var(--muted)}.empty-state h2{color:var(--purple)}.editor-heading{display:flex;justify-content:space-between;gap:15px;align-items:flex-start}.editor-heading h2{margin:0;color:var(--purple)}.editor-actions{display:flex;gap:8px;flex-wrap:wrap}.question-editor{border:1px solid var(--line);border-radius:12px;padding:17px;margin-top:18px;background:#fffefa}.question-editor-top{display:flex;justify-content:space-between;gap:10px;align-items:center}.question-editor-top strong{color:var(--purple)}.question-editor textarea{min-height:80px}.choice-editor{display:grid;grid-template-columns:1fr 1fr;gap:9px}.choice-editor label{margin:11px 0 0}.choice-input{display:flex;align-items:center;gap:7px}.choice-input input[type=text]{flex:1}.choice-input input[type=radio]{width:auto}.set-meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:.84rem;margin:.45rem 0 1.2rem}.attempt-detail h2{color:var(--purple);margin-top:0}.detail-block{background:#fffefa;border:1px solid var(--line);border-radius:8px;margin-top:13px;padding:13px}.detail-block h3{font-size:1rem;color:var(--purple);margin:0 0 9px}.detail-choice{display:flex;gap:8px;padding:8px 0;border-bottom:1px solid #eee7ee}.detail-choice:last-child{border:0}.detail-choice.correct{color:var(--good);font-weight:700}.detail-choice.selected{background:#fff8df}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:850px){.entry-layout,.login-shell,.admin-grid-two{grid-template-columns:1fr}.identity-card{grid-column:auto;grid-row:auto}.quiz-layout{grid-template-columns:1fr}.navigator{position:static;order:initial}.admin-stat-grid{grid-template-columns:repeat(2,1fr)}.admin-toolbar{align-items:flex-start;flex-direction:column}.toolbar-actions{width:100%;flex-wrap:wrap}.toolbar-actions select{flex:1}.sets-layout{grid-template-columns:1fr}.set-list{display:flex;overflow:auto}.set-list-item{min-width:220px}.quiz-topbar{align-items:center;position:sticky;top:0;z-index:4;padding:8px 0;background:var(--cream)}}@media(max-width:520px){.site-header{height:68px;padding:0 16px}.brand-logo{width:38px;height:38px}.header-pill{font-size:.72rem}.page-wrap,.admin-wrap{padding:25px 14px}.hero-copy h1{font-size:2.25rem}.question-actions .button{flex:1}.timer-card{padding:8px 12px;min-width:112px}.timer-card strong{font-size:1.4rem}.quiz-topbar h1{font-size:1.55rem}.admin-stat-grid{gap:8px}.admin-stat{padding:13px}.admin-stat strong{font-size:1.45rem}.login-brand h1{font-size:2.4rem}.choice-editor{grid-template-columns:1fr}.dialog-actions{flex-direction:column-reverse}.dialog-actions .button{width:100%}.receipt{grid-template-columns:1fr}.admin-header-actions{gap:4px}.admin-header-actions .header-pill{display:none}}
#tab-roster .admin-grid-two > .card:first-child{padding:clamp(20px,3vw,28px);min-width:0}
.performance-section{margin-bottom:24px}
.performance-stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.performance-stat{padding:22px 24px;border-top:4px solid var(--brand);min-width:0}
.performance-stat:last-child{border-top-color:var(--gold)}
.performance-stat>strong{display:block;font-size:clamp(2rem,3vw,2.7rem);line-height:1.25;letter-spacing:-.035em;color:var(--purple);font-variant-numeric:tabular-nums}
.performance-stat>p:last-child{margin:8px 0 0;overflow-wrap:anywhere}
.performance-scope{margin:12px 2px 20px;max-width:110ch}
.performance-chart-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.performance-chart{padding:24px;min-width:0}
.score-distribution{display:grid;gap:16px;padding-top:6px}
.distribution-row{display:grid;grid-template-columns:88px minmax(0,1fr) 32px;gap:12px;align-items:center;font-size:.88rem}
.distribution-row>strong{text-align:right;color:var(--purple);font-variant-numeric:tabular-nums}
.chart-label{color:var(--muted);font-variant-numeric:tabular-nums}
.chart-track{height:12px;border-radius:4px;background:#eee6f0;overflow:hidden}
.chart-bar{display:block;height:100%;background:var(--brand);border-radius:4px}
.chart-empty{color:var(--muted);padding:26px 0;min-height:100px;margin:0}
.quickest-row{margin:0 0 17px}
.quickest-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.quickest-heading>div{min-width:0;display:flex;align-items:baseline;gap:8px}
.quickest-heading>strong{white-space:nowrap;font-variant-numeric:tabular-nums;color:var(--purple)}
.quickest-heading .table-action{padding:0;text-align:left;overflow-wrap:anywhere}
.quickest-rank{color:var(--muted);font-size:.8rem;font-weight:750;flex-shrink:0}
.quickest-row p{margin:3px 0 8px;overflow-wrap:anywhere}
.quickest-bar{background:var(--good)}
.quickest-average{border-top:1px solid var(--line);padding-top:14px;margin-top:4px;font-size:.8rem}
.quickest-average .chart-track{margin-top:8px}
.average-bar{background:#9c7210}
@media(max-width:850px){.performance-chart-grid{grid-template-columns:1fr}.performance-stat-grid{gap:10px}.performance-stat{padding:18px 16px}}
@media(max-width:560px){.performance-stat-grid{grid-template-columns:1fr}.performance-chart{padding:20px 16px}.distribution-row{grid-template-columns:84px minmax(0,1fr) 24px;gap:8px}}
/* Question-bank transfer controls must fit narrow instructor screens. */
.sets-layout > *{min-width:0}
.set-list-card{align-self:start}
.set-transfer{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.set-transfer label{display:block;font-size:.84rem;font-weight:750;margin:16px 0 6px;color:var(--purple)}
.set-transfer input{min-width:0;max-width:100%}
.set-transfer .preview-box{max-height:260px;overflow-wrap:anywhere}
.set-transfer h4{margin:0 0 8px;color:var(--purple)}
@media(max-width:850px){.set-list-item{flex-shrink:0}.editor-heading{flex-wrap:wrap}.editor-heading>div{min-width:0}}