:root{--color-black:#000000;--color-tan:#86745c;--color-light-tan:#c2baab;--color-dark-tan:#6a5c48;--color-white:#ffffff;--color-black-63:rgba(0,0,0,.63);--color-black-80:rgba(0,0,0,.8);--color-black-88:rgba(0,0,0,.88);--color-gold:#b19977;--color-accent:#b19977;--color-accent-light:#c2baab;--shadow:0 14px 38px rgba(0,0,0,.18)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f4f1ec;color:var(--color-black)}button,input,select{font:inherit}button{cursor:pointer}.topbar{background:linear-gradient(135deg,var(--color-black-88),var(--color-black));color:var(--color-white);padding:42px clamp(20px,5vw,72px) 34px;display:flex;justify-content:space-between;gap:24px;align-items:flex-start;border-bottom:5px solid var(--color-gold)}.brand{max-width:900px}.eyebrow,.kicker{font-size:.78rem;letter-spacing:.18em;font-weight:800;color:var(--color-gold)}h1{font-size:clamp(2rem,4vw,4rem);line-height:1;margin:.4rem 0 .9rem}.brand p{color:var(--color-light-tan);font-size:1.05rem;margin:0}.tabs{position:sticky;top:0;z-index:5;display:flex;gap:6px;background:var(--color-dark-tan);padding:10px clamp(14px,5vw,72px);box-shadow:0 4px 18px rgba(0,0,0,.15)}.tab,.ghost,.secondary,.primary,.danger{border:0;border-radius:10px;font-weight:800;padding:11px 16px}.tab{background:transparent;color:var(--color-white)}.tab.active{background:var(--color-gold);color:var(--color-black)}.ghost{background:transparent;color:var(--color-white);border:1px solid var(--color-light-tan)}main{max-width:1280px;margin:0 auto;padding:38px clamp(16px,4vw,48px) 72px}.view{display:none}.view.active{display:block}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:flex-end;margin-bottom:24px}.section-head h2{font-size:clamp(1.8rem,3vw,2.7rem);margin:.25rem 0 .4rem}.section-head p{margin:0;color:#554d43}.stat{background:var(--color-black);color:white;border-radius:16px;padding:15px 22px;min-width:120px;text-align:center}.stat strong{display:block;color:var(--color-gold);font-size:1.8rem}.stat span{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em}.controls,.panel{background:white;border:1px solid #ded7cc;border-radius:18px;padding:18px;box-shadow:var(--shadow)}.controls{display:flex;gap:12px;align-items:end;margin-bottom:22px}.controls label,.setup-grid label{display:grid;gap:6px;font-weight:700}.search{flex:1}.controls input,.controls select,.setup-grid select{border:1px solid var(--color-light-tan);border-radius:10px;padding:11px;background:white;min-height:44px}.secondary{background:var(--color-light-tan);color:var(--color-black)}.primary{background:var(--color-black);color:var(--color-white);border:2px solid var(--color-black)}.primary:hover{background:var(--color-dark-tan);border-color:var(--color-dark-tan)}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px}.study-card{min-height:245px;perspective:1000px}.study-card-inner{position:relative;width:100%;height:100%;min-height:245px;transition:transform .45s;transform-style:preserve-3d}.study-card.flipped .study-card-inner{transform:rotateY(180deg)}.card-face{position:absolute;inset:0;backface-visibility:hidden;background:white;border:1px solid #ddd4c7;border-radius:18px;padding:20px;box-shadow:0 8px 22px rgba(0,0,0,.1);display:flex;flex-direction:column}.card-face.back{transform:rotateY(180deg);background:var(--color-black);color:white;border-color:var(--color-gold)}.badge{display:inline-flex;align-self:flex-start;background:var(--color-gold);color:var(--color-black);padding:5px 9px;border-radius:999px;font-size:.75rem;font-weight:900;letter-spacing:.04em}.card-face h3{font-size:1.02rem;line-height:1.45;margin:16px 0}.card-face.back h3{color:var(--color-gold);font-size:.82rem;text-transform:uppercase;letter-spacing:.08em}.answer-text{font-size:1.08rem;line-height:1.5;margin:0}.flip-btn{margin-top:auto;align-self:flex-start;background:transparent;border:0;padding:0;color:var(--color-dark-tan);font-weight:900}.back .flip-btn{color:var(--color-light-tan)}.setup-grid{display:grid;grid-template-columns:repeat(2,minmax(220px,1fr));gap:16px;align-items:end}.setup-grid select{width:100%}.check{display:flex!important;grid-column:1/2;align-items:center!important;grid-template-columns:auto 1fr!important}.quiz{max-width:820px;margin:0 auto}.quiz-top{display:flex;justify-content:space-between;font-weight:800;margin-bottom:8px}.progress-track{height:9px;background:#ddd5c9;border-radius:999px;overflow:hidden;margin-bottom:18px}.progress-track div{height:100%;width:0;background:var(--color-gold);transition:width .25s}.question-card{background:white;border-radius:20px;padding:clamp(20px,4vw,36px);box-shadow:var(--shadow);border-top:5px solid var(--color-gold)}.question-card h3{font-size:clamp(1.3rem,2.4vw,1.9rem);line-height:1.35}.answers{display:grid;gap:10px;margin:22px 0}.answer-btn{text-align:left;border:1px solid var(--color-light-tan);border-radius:12px;padding:14px 16px;background:#faf8f4}.answer-btn:hover:not(:disabled){border-color:var(--color-dark-tan);background:#f0ebe3}.answer-btn.correct{background:#e8f3e8;border-color:#407a43}.answer-btn.wrong{background:#fae9e7;border-color:#9d433c}.answer-btn:disabled{cursor:default}.feedback{border-left:5px solid var(--color-gold);background:#f2eee8;padding:14px 16px;border-radius:10px;margin-bottom:16px;line-height:1.5}.results{text-align:center;max-width:720px;margin:0 auto}.results .big-score{font-size:4rem;margin:.1em 0;color:var(--color-dark-tan)}.review-list{text-align:left;display:grid;gap:10px;margin-top:22px}.review-item{border:1px solid #ded7cc;border-radius:12px;padding:12px}.progress-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:18px}.metric{background:var(--color-black);color:white;border-radius:16px;padding:20px}.metric span{color:var(--color-light-tan)}.metric strong{display:block;font-size:2.2rem;color:var(--color-gold);margin-top:5px}.lesson-row{display:grid;grid-template-columns:minmax(140px,220px) 1fr auto;gap:12px;align-items:center;padding:10px 0}.lesson-bar{height:10px;background:#e6e0d7;border-radius:999px;overflow:hidden}.lesson-bar i{display:block;height:100%;background:var(--color-gold)}.danger{margin-top:20px;background:#4b1d1a;color:white}.hidden{display:none!important}footer{background:var(--color-black);color:var(--color-light-tan);padding:22px clamp(20px,5vw,72px);display:flex;justify-content:space-between;gap:12px;font-size:.9rem}body.high-contrast{background:white}body.high-contrast .card-face,body.high-contrast .controls,body.high-contrast .panel,body.high-contrast .question-card{border:2px solid #000;box-shadow:none}@media(max-width:720px){.topbar,.section-head,.controls,footer{flex-direction:column;align-items:stretch}.top-actions{align-self:flex-start}.tabs{overflow:auto}.setup-grid{grid-template-columns:1fr}.check{grid-column:auto}.progress-cards{grid-template-columns:1fr}.lesson-row{grid-template-columns:1fr}.stat{align-self:flex-start}.card-grid{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}