:root{--bg: #f5f7fb;--card: #ffffff;--text: #172033;--muted: #4b5568;--border: #c8d1df;--accent: #1f5f99;--accent-dark: #164870;--focus: #0b57d0;--success-bg: #eaf7ef;--success-border: #3f8f59;--review-bg: #fff4e8;--review-border: #a86816;--error-bg: #fdecea;--error-border: #b3261e;--error-text: #8c1d18}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,Helvetica,sans-serif;line-height:1.5;background:var(--bg);color:var(--text)}.skip-link{position:absolute;top:-100px;left:1rem;background:#fff;color:#000;border:3px solid var(--focus);padding:.75rem 1rem;z-index:1000}.skip-link:focus{top:1rem}.site-header{background:#10253f;color:#fff;padding:2.5rem 1.5rem}.site-header>div,.layout,footer{max-width:1180px;margin:0 auto}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;margin:0 0 .35rem;color:#d7e7fa}h1,h2,h3,legend{line-height:1.2;color:var(--text)}.site-header h1{color:#fff}h1{font-size:clamp(1.8rem,4vw,3rem);margin:0 0 .75rem}h2{font-size:1.35rem;margin-top:0}.subheading{font-size:1.08rem;margin:1rem 0 .35rem}legend{font-weight:700;font-size:1.08rem;padding:0}.lead{max-width:820px;font-size:1.08rem;margin:0;color:#eef5ff}.layout{display:grid;grid-template-columns:1fr;gap:1.25rem;padding:1.25rem}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.25rem;box-shadow:0 8px 24px #1720330f}.score{font-size:1.6rem;font-weight:700;margin:.5rem 0}.workflow{margin:1rem 0 0;padding-left:1.25rem}.workflow li{margin:.35rem 0}.muted,.hint{color:var(--muted)}.hint{font-size:.95rem;margin:.25rem 0 0;font-weight:400}.setup-status,.attempt-status,.feedback{border:1px solid var(--border);border-radius:10px;padding:.85rem;margin:.75rem 0 1rem;background:#f4f6f9}.feedback.correct{background:var(--success-bg);border-color:var(--success-border)}.feedback.incorrect{background:var(--review-bg);border-color:var(--review-border)}.setup-status.error{background:var(--error-bg);border-color:var(--error-border)}.setup-status p{margin:0}.setup-errors-title{margin:.75rem 0 .25rem;font-weight:700;color:var(--error-text)}.setup-errors ul{margin:0;padding-left:1.25rem;color:var(--error-text)}.field-error{margin:.35rem 0 0;font-size:.95rem;font-weight:700;color:var(--error-text)}select[aria-invalid=true],input[aria-invalid=true]{border:2px solid var(--error-border)}.section-heading{display:flex;justify-content:space-between;gap:1rem;align-items:center}.controls,.answer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:.9rem;margin:1rem 0}fieldset{border:1px solid var(--border);border-radius:12px;padding:1rem}.full-width{grid-column:1 / -1}label,.reason-label{display:block;margin-bottom:.35rem;font-weight:700;color:var(--text)}select,input,button{font:inherit}select,input{width:100%;padding:.72rem;border:1px solid #7f8b9d;border-radius:8px;background:#fff;color:var(--text)}select:disabled{background:#eef1f6;color:#5c667a}select:focus,input:focus,button:focus,.prompt:focus{outline:3px solid var(--focus);outline-offset:2px}button{border:1px solid var(--accent);border-radius:8px;padding:.72rem 1rem;background:#fff;color:var(--accent);cursor:pointer;font-weight:700}button.primary{background:var(--accent);color:#fff;margin-top:.25rem}button:hover{background:var(--accent-dark);color:#fff}button:disabled{opacity:.55;cursor:not-allowed}.summary{display:flex;flex-wrap:wrap;gap:1rem;margin:.5rem 0 .6rem;color:var(--muted);border:1px solid var(--border);border-radius:10px;padding:.85rem;background:#f8fafc}.summary p{margin:0}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:10px}table{width:100%;border-collapse:collapse;min-width:420px}caption{text-align:left;font-weight:700;padding:.85rem;background:#eef3fa}th,td{padding:.75rem .85rem;border-top:1px solid var(--border);text-align:left}th{background:#f8fafc}td:last-child,th:last-child{text-align:right}.prompt{background:#eef3fa;border-radius:10px;padding:1rem;margin:1rem 0}.feedback{min-height:3rem}footer{padding:1.5rem;color:var(--muted)}.visually-hidden{position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}@media (min-width: 980px){.layout{grid-template-columns:1fr 1fr}.scenario{grid-column:1 / -1}}@media (forced-colors: active){button,select,input,.card,.setup-status,.feedback,.table-wrap{border:1px solid CanvasText}select[aria-invalid=true]{border:2px dashed CanvasText}}.embedded-question{margin:1rem 0;padding:1rem;border:1px solid var(--border);border-radius:10px;background:#f8fafc}.sentence-line{line-height:2.6;margin:.5rem 0 0}.sentence-line select{display:inline-block;width:auto;min-width:12rem;margin:0 .25rem}@media (max-width: 720px){.sentence-line select{display:block;width:100%;margin:.35rem 0}}.reason-trigger{display:flex;align-items:flex-start;justify-content:space-between;gap:.75rem;width:100%;padding:.72rem;border:1px solid #7f8b9d;border-radius:8px;background:#fff;color:var(--text);font-weight:400;text-align:left}.reason-trigger:hover{background:#f4f6f9;color:var(--text)}.reason-trigger [data-placeholder]{color:var(--muted)}.reason-caret{flex:none;color:var(--muted)}.reason-popover{min-width:var(--trigger-width);max-width:min(38rem,calc(100vw - 2rem));border:1px solid var(--border);border-radius:10px;background:var(--card);box-shadow:0 8px 24px #1720332e;overflow:auto}.reason-listbox{max-height:inherit;padding:.25rem;outline:none}.reason-option{padding:.6rem .72rem;border-radius:6px;cursor:pointer;white-space:normal}.reason-option+.reason-option{border-top:1px solid var(--border)}.reason-option[data-hovered],.reason-option[data-focused]{background:#eef3fa}.reason-option[data-selected]{background:var(--accent);color:#fff}@media (forced-colors: active){.reason-trigger,.reason-popover{border:1px solid CanvasText}.reason-option[data-selected]{background:Highlight;color:HighlightText}}.tutorial,.done{grid-column:1 / -1}details summary{cursor:pointer;font-weight:700;color:var(--accent);padding:.5rem 0}details summary:focus{outline:3px solid var(--focus);outline-offset:2px}.video-frame{position:relative;width:100%;max-width:760px;aspect-ratio:16 / 9;margin:1rem 0;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#000}.video-frame iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}.auth-main{max-width:460px;margin:4rem auto;padding:0 1.25rem}.auth-main .field{margin:0 0 1rem}.dashboard-shell{min-height:100vh}.dashboard-bar{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.75rem 1.25rem;background:var(--card);border-bottom:1px solid var(--border)}.dashboard-brand{font-weight:700;font-size:1.1rem;color:var(--accent);text-decoration:none}.dashboard-brand span{color:var(--muted);font-weight:400}.dashboard-brand:hover{color:var(--accent-dark)}.dashboard-account{display:flex;align-items:center;gap:.85rem}.dashboard-content{max-width:1100px;margin:0 auto;padding:1.5rem 1.25rem}.dashboard-back{margin:0 0 1rem}.dashboard-back a{color:var(--accent);font-weight:700;text-decoration:none}.dashboard-back a:hover{text-decoration:underline}.card--narrow{max-width:560px}.button-link{display:inline-block;border:1px solid var(--accent);border-radius:8px;padding:.55rem .9rem;background:var(--accent);color:#fff;text-decoration:none;font-weight:700}.button-link:hover{background:var(--accent-dark)}.sort-button{width:100%;border:0;background:none;padding:0;font-weight:700;color:var(--text);text-align:inherit;cursor:pointer}.sort-button:hover{background:none;color:var(--accent-dark)}