:root { --navy:#071827; --teal:#063f3b; --green:#0d5b50; --gold:#e8b12f; --orange:#e88731; --cream:#fffaf0; --ink:#12202a; --muted:#5f6c73; --line:#d8dfdc; font-family:Inter,Aptos,Arial,sans-serif; color:var(--ink); background:#f3f6f5; }
* { box-sizing:border-box; } body { margin:0; } button,select { font:inherit; }
.prototype-header { display:flex; justify-content:space-between; gap:24px; padding:28px max(20px,calc((100vw - 1040px)/2)); color:var(--cream); background:linear-gradient(135deg,var(--navy),var(--teal)); border-bottom:4px solid var(--gold); }
.prototype-header h1 { margin:4px 0 8px; font-family:Georgia,serif; font-weight:500; } .prototype-header p { max-width:720px; margin:0; line-height:1.5; }
.eyebrow { color:var(--gold); font-size:12px; font-weight:800; letter-spacing:.08em; text-transform:uppercase; } .header-link { align-self:start; min-height:44px; padding:11px 15px; border:1px solid var(--gold); color:var(--cream); font-weight:800; text-decoration:none; } .header-link:hover,.header-link:focus-visible { color:var(--navy); background:var(--gold); outline:2px solid #fff; outline-offset:2px; }
main { width:min(1040px,calc(100% - 32px)); margin:24px auto 110px; } .practice-toolbar,.progress-strip,.question-shell,.signup-prompt { border:1px solid var(--line); background:#fff; }
.practice-toolbar { display:grid; grid-template-columns:repeat(3,minmax(150px,1fr)) auto; gap:12px; padding:16px; } .practice-toolbar label { display:grid; gap:6px; color:var(--muted); font-size:13px; font-weight:800; }
.practice-toolbar select { min-height:42px; padding:8px; border:1px solid var(--line); background:#fff; color:var(--ink); } .mixed-toggle { display:flex!important; align-items:center; align-self:end; min-height:42px; color:var(--ink)!important; }
.progress-strip { display:grid; grid-template-columns:repeat(4,1fr); margin-top:12px; background:var(--cream); } .progress-strip span { padding:12px; border-right:1px solid var(--line); text-align:center; } .progress-strip span:last-child { border-right:0; } .progress-strip strong { display:block; color:var(--teal); font-size:20px; }
.question-shell { min-height:380px; margin-top:16px; padding:clamp(20px,4vw,38px); } .question-meta { display:flex; justify-content:space-between; gap:12px; color:var(--muted); font-size:13px; font-weight:800; }
.question-stem { margin:24px 0; font-family:Georgia,serif; font-size:clamp(20px,2.5vw,27px); font-weight:500; line-height:1.45; } .question-stem p { margin:0 0 14px; } .question-stem p:last-child { margin-bottom:0; } .math { font-family:"Cambria Math",Cambria,serif; font-style:italic; } .option-list { display:grid; gap:10px; }
.option-button { display:grid; grid-template-columns:34px 1fr; gap:12px; align-items:center; width:100%; padding:12px; border:1px solid var(--line); background:#fff; text-align:left; cursor:pointer; } .option-button:hover,.option-button:focus-visible { border-color:var(--orange); outline:2px solid rgba(232,135,49,.25); } .option-button.selected { border-color:var(--teal); background:#eef8f5; }
.option-letter { display:grid; place-items:center; width:32px; height:32px; color:#fff; background:var(--teal); font-weight:800; } .answer-feedback { margin-top:18px; padding:16px; border-left:4px solid var(--orange); background:var(--cream); } .answer-feedback.correct { border-left-color:var(--green); } .answer-feedback h3 { margin:0 0 8px; } .answer-feedback p { margin:6px 0; line-height:1.5; } .feedback-context { color:var(--muted); font-size:13px; } .answer-status { min-height:22px; margin-top:10px; color:var(--muted); font-weight:700; } .answer-status.error,.load-status.error { color:#9d2525; } .practice-diagram { display:grid; place-items:center; margin:0 0 22px; padding:12px; border:1px solid var(--line); background:#fff; } .practice-diagram img { display:block; max-width:min(100%,820px); max-height:520px; object-fit:contain; } .question-data-table-wrap { overflow-x:auto; margin:14px 0; } .question-data-table-wrap table { width:100%; border-collapse:collapse; font-family:Inter,Aptos,Arial,sans-serif; font-size:16px; } .question-data-table-wrap th,.question-data-table-wrap td { padding:8px; border:1px solid var(--line); text-align:left; }
.practice-option-review { margin-top:14px; border-top:1px solid var(--line); padding-top:12px; }
.practice-option-review summary { color:var(--teal); font-weight:800; cursor:pointer; }
.practice-option-review > div { display:grid; gap:8px; margin-top:10px; }
.practice-option-review article { padding:10px 12px; border:1px solid var(--line); background:#fff; }
.practice-option-review article.correct-option-feedback { border-color:var(--green); background:#eef8f5; }
.practice-option-review article p { margin-bottom:0; }
.question-actions { display:flex; justify-content:space-between; align-items:end; gap:12px; margin-top:14px; } .question-actions button,.signup-prompt a,.signup-prompt button { min-height:44px; padding:10px 16px; border:1px solid var(--teal); color:var(--teal); background:#fff; font-weight:800; text-decoration:none; cursor:pointer; } .question-actions .primary,.signup-prompt a { color:#fff; background:var(--teal); } .question-actions button:disabled { opacity:.45; cursor:not-allowed; } .jump-label { display:grid; gap:4px; flex:1; max-width:420px; color:var(--muted); font-size:12px; font-weight:800; } .jump-label select { min-height:44px; padding:8px; border:1px solid var(--line); background:#fff; } .load-status { width:min(1040px,calc(100% - 32px)); margin:24px auto; padding:18px; border:1px solid var(--line); background:#fff; font-weight:800; }
.account-progress-panel { margin-top:12px; padding:20px; border:1px solid var(--line); background:#fff; } .account-progress-heading { display:flex; justify-content:space-between; gap:24px; align-items:start; } .account-progress-heading h2 { margin:3px 0 8px; font-family:Georgia,serif; font-weight:500; } .account-sync-status,.account-identity { margin:4px 0; color:var(--muted); line-height:1.45; } .account-sync-status.synced { color:var(--green); font-weight:800; } .account-sync-status.sync-error { color:#9d2525; } .account-progress-actions { display:flex; flex-wrap:wrap; justify-content:flex-end; gap:8px; max-width:520px; } .account-progress-actions a,.account-progress-actions button { min-height:42px; padding:9px 13px; border:1px solid var(--teal); color:var(--teal); background:#fff; font-weight:800; text-decoration:none; cursor:pointer; } .account-progress-actions a { color:#fff; background:var(--teal); } .module-progress { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:18px; } .module-progress-card { padding:14px; border:1px solid var(--line); background:var(--cream); } .module-progress-card strong { display:block; margin-bottom:8px; color:var(--teal); } .module-progress-card span { display:block; margin-top:3px; color:var(--muted); font-size:14px; } .topic-progress-details { margin-top:16px; border-top:1px solid var(--line); padding-top:14px; } .topic-progress-details summary { color:var(--teal); font-weight:800; cursor:pointer; } .topic-progress-table-wrap { overflow-x:auto; margin-top:12px; } .topic-progress-table { width:100%; border-collapse:collapse; font-size:14px; } .topic-progress-table th,.topic-progress-table td { padding:9px; border:1px solid var(--line); text-align:left; white-space:nowrap; } .topic-progress-table th { background:var(--cream); color:var(--teal); } .signup-prompt { position:fixed; right:18px; bottom:18px; left:18px; z-index:20; display:flex; justify-content:space-between; gap:20px; width:min(920px,calc(100% - 36px)); margin:auto; padding:18px; box-shadow:0 18px 50px rgba(7,24,39,.25); } .signup-prompt[hidden] { display:none; } .signup-prompt p { margin:5px 0 0; color:var(--muted); } .signup-prompt>div:first-child { flex:1 1 auto; min-width:0; } .signup-prompt>div:last-child { display:flex; flex:0 0 auto; align-items:center; gap:8px; } .signup-prompt a { white-space:nowrap; } .empty-state { color:var(--muted); text-align:center; }
@media(max-width:760px){ .prototype-header,.signup-prompt{display:grid}.practice-toolbar{grid-template-columns:1fr 1fr}.progress-strip{grid-template-columns:1fr 1fr}.progress-strip span:nth-child(2){border-right:0}.progress-strip span:nth-child(-n+2){border-bottom:1px solid var(--line)}.account-progress-heading{display:grid}.account-progress-actions{justify-content:start;max-width:none}.module-progress{grid-template-columns:1fr}.signup-prompt>div:last-child{flex-wrap:wrap}.question-actions{display:grid;grid-template-columns:1fr 1fr}.jump-label{grid-column:1/-1;grid-row:1;max-width:none}.practice-diagram{padding:6px} }
@media(max-width:480px){ .practice-toolbar{grid-template-columns:1fr}.question-meta{display:grid}.account-progress-actions{display:grid}.account-progress-actions a,.account-progress-actions button{width:100%;text-align:center}.topic-progress-table th,.topic-progress-table td{padding:7px} }