body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#172033;background:#fff;line-height:1.65}header{display:flex;justify-content:space-between;align-items:center;padding:22px 7%;border-bottom:1px solid #e5e7eb}a{color:#003366}.brand{font-weight:800;text-decoration:none;color:#003366}nav{display:flex;gap:18px;flex-wrap:wrap}nav a{text-decoration:none;color:#374151;font-weight:600}.hero,main.page{max-width:940px;margin:0 auto;padding:64px 24px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:#1a4a7a}h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.1;color:#003366;margin:.2em 0}h2{font-size:1.55rem;color:#003366;margin-top:2.2rem;border-top:1px solid #e5e7eb;padding-top:1.3rem}h3{color:#1a4a7a;margin-top:1.4rem}.button{display:inline-block;background:#003366;color:#fff;text-decoration:none;padding:13px 20px;border-radius:8px;font-weight:800;margin-top:16px}.card{border:1px solid #d0d7de;border-radius:14px;padding:24px;margin:18px 0;background:#f9fafb}.price{font-size:2.2rem;font-weight:900;color:#003366}.muted{color:#5b6472}.notice{background:#fff8e1;border:1px solid #f0d98c;border-radius:10px;padding:14px 16px;margin:22px 0}table{width:100%;border-collapse:collapse;margin:18px 0}th,td{border:1px solid #d0d7de;padding:10px;text-align:left}th{background:#003366;color:white}footer{border-top:1px solid #e5e7eb;padding:28px 7%;color:#5b6472}ul{padding-left:1.3rem}@media(max-width:700px){header{align-items:flex-start;gap:14px;flex-direction:column}nav{gap:12px}.hero,main.page{padding-top:38px}}

.button.secondary{background:#1A4A7A;margin-left:10px}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}.feature-grid h3{margin-top:0}.badge-hero{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:start;margin:28px 0}.badge-hero img{width:100%;border-radius:18px;box-shadow:0 14px 35px rgba(0,51,102,.18)}blockquote{border-left:4px solid #003366;margin:18px 0;padding:10px 18px;background:#f9fafb;color:#374151}@media(max-width:760px){.badge-hero{grid-template-columns:1fr}.button.secondary{margin-left:0;margin-top:10px}}

/* Premium SaaS UI layer — CAI v2 */
:root{
  --cai-ink:#fbfcff;
  --cai-muted:#c0c7d6;
  --cai-soft:#d8def0;
  --cai-bg:#111827;
  --cai-panel:#172033;
  --cai-panel-2:#1f2a44;
  --cai-line:rgba(255,255,255,.09);
  --cai-line-strong:rgba(255,255,255,.16);
  --cai-indigo:#6d74ff;
  --cai-indigo-2:#8b7dff;
  --cai-gold:#d4af37;
  --cai-green:#34d399;
  --cai-red:#fb7185;
  --cai-shadow:0 24px 80px rgba(0,0,0,.42);
}
body.premium-ui{background:radial-gradient(circle at 18% -8%,rgba(109,116,255,.24),transparent 34%),radial-gradient(circle at 88% 2%,rgba(212,175,55,.13),transparent 30%),linear-gradient(180deg,#172033 0%,#111827 46%,#0f172a 100%);color:var(--cai-ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;letter-spacing:-.01em}
body.premium-ui header{position:sticky;top:0;z-index:20;background:rgba(17,24,39,.78);backdrop-filter:blur(20px);border-bottom:1px solid var(--cai-line);padding:16px 5%}
body.premium-ui .brand{color:var(--cai-ink);font-weight:650}body.premium-ui nav a{color:var(--cai-muted);font-weight:520}body.premium-ui nav a:hover{color:var(--cai-ink)}
body.premium-ui main.page{max-width:1180px;padding:42px 24px 72px}body.premium-ui .eyebrow{color:var(--cai-indigo-2);font-size:.72rem;letter-spacing:.16em}body.premium-ui h1{color:var(--cai-ink);font-weight:560;letter-spacing:-.055em}body.premium-ui h2{color:var(--cai-ink);border-top-color:var(--cai-line);font-weight:560}body.premium-ui h3{color:var(--cai-soft)}body.premium-ui p,body.premium-ui li{color:var(--cai-muted)}
body.premium-ui .button,.premium-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid rgba(255,255,255,.12);background:linear-gradient(180deg,var(--cai-indigo),#555bdf);color:#fff;border-radius:12px;padding:12px 18px;font-weight:650;text-decoration:none;box-shadow:0 12px 30px rgba(93,106,210,.22);cursor:pointer;transition:transform .18s ease,border-color .18s ease,background .18s ease}body.premium-ui .button:hover,.premium-button:hover{transform:translateY(-1px);border-color:rgba(255,255,255,.25)}body.premium-ui .button.secondary,.premium-button.secondary{background:rgba(255,255,255,.045);color:var(--cai-ink);box-shadow:none}
.premium-shell{display:grid;grid-template-columns:320px minmax(0,1fr);gap:22px;align-items:start}.premium-panel{background:linear-gradient(180deg,rgba(255,255,255,.095),rgba(255,255,255,.045));border:1px solid var(--cai-line);border-radius:24px;box-shadow:var(--cai-shadow)}.premium-sidebar{padding:20px;position:sticky;top:88px}.premium-card{background:rgba(255,255,255,.065);border:1px solid var(--cai-line);border-radius:18px;padding:18px}.premium-progress{height:10px;background:rgba(255,255,255,.07);border:1px solid var(--cai-line);border-radius:999px;overflow:hidden}.premium-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--cai-indigo),var(--cai-gold));border-radius:999px;transition:width .28s ease}.premium-stat{display:flex;justify-content:space-between;gap:10px;padding:11px 0;border-bottom:1px solid var(--cai-line);font-size:.92rem}.premium-stat:last-child{border-bottom:0}.premium-stat b{color:var(--cai-ink);font-weight:650}.premium-kicker{display:inline-flex;gap:8px;align-items:center;padding:6px 10px;border:1px solid var(--cai-line);border-radius:999px;background:rgba(255,255,255,.035);color:var(--cai-soft);font-size:.78rem;font-weight:650}.premium-kicker:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--cai-green);box-shadow:0 0 18px var(--cai-green)}
.assessment-stage{padding:28px}.assessment-top{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:22px}.assessment-count{font-variant-numeric:tabular-nums;color:var(--cai-muted);font-weight:650}.question-title{font-size:clamp(1.45rem,3vw,2.35rem);line-height:1.16;color:var(--cai-ink);font-weight:560;letter-spacing:-.04em;margin:10px 0 22px}.answer-grid{display:grid;gap:12px}.answer-card{width:100%;text-align:left;background:rgba(255,255,255,.06);border:1px solid var(--cai-line);border-radius:18px;padding:18px 18px 18px 64px;color:var(--cai-soft);position:relative;cursor:pointer;transition:transform .18s ease,border-color .18s ease,background .18s ease}.answer-card:hover{transform:translateY(-1px);border-color:rgba(139,125,255,.52);background:rgba(255,255,255,.06)}.answer-card .letter{position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:10px;display:grid;place-items:center;background:rgba(255,255,255,.06);border:1px solid var(--cai-line);font-weight:750;color:var(--cai-ink)}.answer-card.selected{border-color:var(--cai-indigo);background:rgba(109,116,255,.13)}.answer-card.correct{border-color:rgba(52,211,153,.75);background:rgba(52,211,153,.12)}.answer-card.incorrect{border-color:rgba(251,113,133,.72);background:rgba(251,113,133,.10)}.feedback-panel{display:none;margin-top:18px;padding:18px;border-radius:18px;border:1px solid var(--cai-line);background:rgba(255,255,255,.045)}.feedback-panel.show{display:block}.feedback-panel strong{color:var(--cai-ink)}.assessment-actions{display:flex;gap:12px;justify-content:space-between;align-items:center;margin-top:22px;flex-wrap:wrap}.learner-grid{display:grid;gap:12px}.learner-grid input{width:100%;background:rgba(255,255,255,.045);border:1px solid var(--cai-line);border-radius:12px;padding:12px 14px;color:var(--cai-ink)}.learner-grid label{color:var(--cai-muted);font-size:.9rem}.premium-result{padding:28px}.premium-result.pass{border-color:rgba(52,211,153,.52)}.premium-result.fail{border-color:rgba(251,113,133,.52)}.completion-summary{white-space:pre-wrap;background:#05070c;border:1px solid var(--cai-line);border-radius:16px;padding:16px;color:var(--cai-soft);overflow:auto}.achievement-row{display:grid;grid-template-columns:92px 1fr;gap:18px;align-items:center}.achievement-medal{width:92px;height:92px;border-radius:24px;background:linear-gradient(145deg,#17213a,#07090f);border:2px solid var(--cai-gold);display:grid;place-items:center;color:var(--cai-gold);font-weight:850;box-shadow:0 0 34px rgba(212,175,55,.16)}
@media(max-width:900px){.premium-shell{grid-template-columns:1fr}.premium-sidebar{position:static}.assessment-top{display:block}.achievement-row{grid-template-columns:1fr}}


/* Assessment card/result polish — May 2026 */
body.premium-ui .answer-grid{display:grid;gap:14px}
body.premium-ui .answer-card{box-sizing:border-box;display:block;width:100%;min-height:68px;padding:18px 20px 18px 70px;text-align:left;font:inherit;font-size:1rem;line-height:1.45;color:var(--cai-soft);white-space:normal;appearance:none;-webkit-appearance:none}
body.premium-ui .answer-card .letter{top:50%;transform:translateY(-50%);left:20px;flex:0 0 auto}
body.premium-ui .answer-card.selected{box-shadow:inset 0 0 0 1px rgba(139,125,255,.28)}
body.premium-ui .answer-card.correct{box-shadow:inset 0 0 0 1px rgba(52,211,153,.32)}
body.premium-ui .answer-card.incorrect{box-shadow:inset 0 0 0 1px rgba(251,113,133,.28)}
body.premium-ui .premium-result .outcome-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:18px 0}
body.premium-ui .premium-result .outcome-card{border:1px solid var(--cai-line);border-radius:16px;background:rgba(255,255,255,.045);padding:16px}
body.premium-ui .premium-result .outcome-card h3{margin:0 0 8px;color:var(--cai-ink)}
body.premium-ui .premium-result .outcome-card p{margin:0}
body.premium-ui .premium-result .result-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
body.premium-ui .premium-result .completion-record{border:1px solid var(--cai-line);border-radius:18px;background:rgba(255,255,255,.04);padding:16px;margin-top:14px}
body.premium-ui .premium-result .completion-record pre{white-space:pre-wrap;margin:8px 0 0;color:var(--cai-soft);font:inherit;line-height:1.55}

@media(max-width:640px){body.premium-ui .answer-card{padding:16px 16px 16px 62px}.answer-card .letter{left:16px}}

/* CAI Network C brand mark */
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-logo{width:54px;height:54px;border-radius:13px;display:inline-block;vertical-align:middle;box-shadow:0 8px 22px rgba(0,0,0,.18)}
.brand-text{display:inline-block;font-size:1.1rem;font-weight:700}
body.premium-ui .brand-logo{box-shadow:0 10px 28px rgba(59,130,246,.18)}
@media(max-width:520px){.brand-logo{width:44px;height:44px}.brand-text{font-size:1rem}}