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a.cta:hover{filter:brightness(1.08);color:var(--brand-fg)}.site-header nav .short{display:none}.brand:focus-visible,.site-header nav a:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.icon{flex:none;vertical-align:-.18em}.site-footer{margin-top:64px;background:linear-gradient(180deg,#0d1428,#090e1c);color:#cbd5e1;border-top:1px solid #1e293b}.site-footer-in{max-width:1080px;margin:0 auto;padding:40px 20px 44px;font-size:.92rem;display:grid;grid-gap:24px;gap:24px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;grid-gap:28px;gap:28px}.footer-col{display:grid;grid-gap:8px;gap:8px;align-content:start}.footer-col h2,.footer-col h4{color:#ffffff;font-family:var(--sans);font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 4px}.footer-col a{color:#cbd5e1;text-decoration:none;font-size:.92rem}.footer-col a:hover{color:#ffffff;text-decoration:underline}.footer-bottom{padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;color:#94a3b8;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}.site-footer .brand,.site-footer strong{color:#ffffff}.hero{text-align:center;padding:48px 12px 24px;position:relative}.hero:before{content:"";position:absolute;left:50%;transform:translateX(-50%);width:100vw;top:-28px;height:480px;z-index:-1;-webkit-mask-image:linear-gradient(180deg,#000 60%,transparent);mask-image:linear-gradient(180deg,#000 60%,transparent);background:radial-gradient(55% 75% at 18% 5%,color-mix(in srgb,var(--brand) 18%,transparent),transparent 70%),radial-gradient(48% 70% at 82% 8%,color-mix(in srgb,var(--ok) 15%,transparent),transparent 70%),radial-gradient(45% 60% at 50% 30%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 75%)}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.82rem;font-weight:700;letter-spacing:.03em;color:var(--brand-text);background:var(--brand-soft);border:1px solid color-mix(in srgb,var(--brand) 24%,transparent);padding:6px 16px;border-radius:999px;box-shadow:var(--shadow-sm)}.hero h1{font-size:clamp(2.05rem,5vw,3.25rem);margin:.45em auto .32em;max-width:16.5em;line-height:1.14}.hero h1 em{font-style:normal;background:linear-gradient(transparent 64%,color-mix(in srgb,var(--accent) 42%,transparent) 64%);padding:0 .08em}.hero p{color:var(--mute);max-width:630px;margin:.5em auto;font-size:1.08rem}.hero p.hero-access{font-size:.86rem;max-width:680px}.answer-hero{padding:18px 22px;margin-bottom:14px}.answer-hero h1{margin:8px 0 2px;font-size:clamp(1.45rem,3vw,1.95rem)}.study-choice{border-color:var(--brand);color:var(--brand-text);background:var(--brand-soft)}.study-help{flex-basis:100%}.study-help .note{margin:8px 0 0}.q-card:has(.board-hidden-box) .answer-report,.q-card:has(.board-hidden-box) .feedback,.q-card:has(.board-hidden-box) details.how{display:none}.search{display:flex;align-items:center;gap:10px;max-width:680px;margin:26px auto 18px;padding:8px 8px 8px 14px;background:var(--surface);border:1.5px solid var(--line-2);border-radius:22px;box-shadow:var(--shadow-lg);transition:border-color .15s,box-shadow .15s}.search input{flex:1 1;border:0;background:transparent;min-height:48px;padding:6px 10px;font-size:1.04rem;box-shadow:none}.search input:focus{outline:none;box-shadow:none}.search:focus-within{border-color:var(--brand-text);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 16%,transparent),var(--shadow-lg)}.search button{border-radius:15px;padding:10px 24px}.stats{display:inline-flex;flex-wrap:wrap;justify-content:center;gap:12px;margin:14px auto 4px}.stat-pill{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:10px 20px;min-width:140px;box-shadow:var(--shadow-sm);text-align:center}.stat-pill b{display:block;font-family:var(--serif);font-size:1.48rem;color:var(--brand-text);line-height:1.15}.level-group{margin-top:14px}.level-h{display:flex;align-items:baseline;gap:10px;margin:0 0 8px;font-family:var(--serif);font-size:1.05rem;letter-spacing:-.01em;color:var(--fg)}.level-h small{font-family:var(--sans);font-size:.78rem;font-weight:650;color:var(--mute)}.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(108px,1fr));grid-gap:12px;gap:12px;margin:12px 0 28px}.tiles a{position:relative;display:grid;place-items:center;grid-gap:2px;gap:2px;padding:18px 8px 14px;border:1px solid var(--line);border-top:3px solid color-mix(in srgb,var(--brand) 45%,var(--line));border-radius:18px;background:var(--surface);color:var(--fg);text-decoration:none;min-height:92px;box-shadow:var(--shadow-sm);transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.tiles a b{font-family:var(--serif);font-size:1.85rem;line-height:1.05;color:var(--brand-text)}.tiles a span{font-size:.84rem;font-weight:550;color:var(--mute)}.tiles a:hover{transform:translateY(-3px);border-color:var(--brand-text);box-shadow:var(--shadow)}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 22px}.chips a{padding:8px 16px;border:1px solid var(--line-2);border-radius:999px;background:var(--surface);color:var(--fg);text-decoration:none;min-height:42px;display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:.93rem;box-shadow:var(--shadow-sm);transition:all .15s ease}.chips a:hover,.chips a[aria-current=true]{border-color:var(--brand-text);color:var(--brand-text);background:var(--brand-soft);transform:translateY(-1px)}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(265px,1fr));grid-gap:16px;gap:16px;margin:26px 0}.feature-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow);display:grid;grid-gap:10px;gap:10px;align-content:start}.feature-card.pro-highlight{border:2px solid var(--brand);background:linear-gradient(180deg,color-mix(in srgb,var(--brand-soft) 55%,var(--surface)) 0,var(--surface) 120px)}.feature-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:1.25rem;background:var(--brand-soft);color:var(--brand-text)}.trust{display:flex;gap:14px;align-items:flex-start;background:var(--ok-soft);border:1px solid var(--ok-border);border-radius:18px;padding:16px 20px;margin:26px 0}.trust svg{flex:none;margin-top:2px;color:var(--ok)}.section-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.section-h small{color:var(--mute)}.booklist{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));grid-gap:14px;gap:14px;margin:14px 0 28px}.book-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 20px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;justify-content:space-between;gap:12px;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.book-card:hover{transform:translateY(-2px);border-color:var(--brand-text);box-shadow:var(--shadow)}.book-card-link{color:inherit;text-decoration:none;display:block}.book-card-link strong{font-family:var(--serif);font-size:1.12rem;line-height:1.3;display:block;margin-top:6px}.pill-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.meta-pill{display:inline-flex;align-items:center;font-size:.76rem;font-weight:700;padding:2px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand-text)}.meta-pill.ok{background:var(--ok-soft);color:var(--ok)}.meter{height:6px;background:var(--bg-2);overflow:hidden;margin-top:8px}.meter,.meter>i{border-radius:999px}.meter>i{display:block;height:100%;background:linear-gradient(90deg,var(--ok),var(--brand))}.book-hero{background:linear-gradient(135deg,color-mix(in srgb,var(--brand-soft) 70%,var(--surface)) 0,var(--surface) 100%);border:1px solid var(--line);border-radius:22px;padding:24px 26px;margin:12px 0 20px;box-shadow:var(--shadow-sm)}.pagegrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));grid-gap:10px;gap:10px;margin:14px 0}.pagegrid a{display:grid;place-items:center;padding:11px 4px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--fg);text-decoration:none;box-shadow:var(--shadow-sm);transition:all .15s ease}.pagegrid a b{font-family:var(--serif);font-size:1.22rem;color:var(--brand-text)}.pagegrid a small{color:var(--mute);font-size:.74rem}.pagegrid a:hover{border-color:var(--brand-text);background:var(--brand-soft);transform:translateY(-2px)}.pager{display:flex;justify-content:space-between;gap:10px;margin:22px 0;flex-wrap:wrap}.pager a{display:inline-flex;align-items:center;min-height:44px;padding:8px 18px;border:1px solid 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