/* Question bank: list, filters and answer pages. Builds on /style.css tokens. */
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.nav nav a[aria-current=page]{color:var(--sc-ink);font-weight:600}
.bank{padding-bottom:40px}
.bank-hero{padding:64px 0 34px;max-width:760px}
.bank-hero h1 span{color:#727a8b}
.bank-hero .lead{margin:22px 0 0;max-width:620px}
.bank-tools{position:sticky;top:0;z-index:20;background:#ffffffee;backdrop-filter:blur(10px);padding:14px 0;border-bottom:1px solid var(--line)}
.search-row{display:flex;gap:10px}
.search{flex:1;display:flex;align-items:center;gap:10px;border:1px solid #d7deea;border-radius:999px;padding:0 18px;background:#fff;color:#7a8497;transition:border-color .16s}
.search:focus-within{border-color:#415eee}
.search input{flex:1;border:0;outline:0;font:inherit;font-size:16px;min-height:50px;background:none;color:var(--sc-ink)}
.filters-toggle{display:none;border:1px solid #d7deea;background:#fff;border-radius:999px;padding:0 18px;font-size:14px;color:#3d4a63}
.filters{display:grid;gap:12px;margin-top:12px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips button,.tag-panel button,.pager button{font-size:13px;border:1px solid #ccd7e9;padding:8px 14px;border-radius:999px;background:#fff;color:#53617a;min-height:38px;transition:background .16s,color .16s,border-color .16s}
.chips button[aria-pressed=true],.tag-panel button[aria-pressed=true],.pager button[aria-current=page]{background:#1f2025;border-color:#1f2025;color:#fff}
.selects{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end}
.selects label{display:grid;gap:4px;font-size:11px;color:#69717f}
.selects select,.tag-toggle{font:inherit;font-size:14px;min-height:40px;border:1px solid #ccd7e9;border-radius:12px;background:#fff;color:#2f3a50;padding:0 12px}
.tag-picker{position:relative}
.tag-toggle{cursor:pointer}
.tag-panel{position:absolute;left:0;top:calc(100% + 8px);z-index:30;width:min(560px,calc(100vw - 32px));max-height:320px;overflow:auto;display:flex;flex-wrap:wrap;gap:6px;padding:14px;background:#fff;border:1px solid #dce2ea;border-radius:18px;box-shadow:0 20px 60px #2a375b1f}
.tag-panel[hidden]{display:none}
.tag-panel small{color:#8b94a5;margin-left:2px}
.tag-panel button[aria-pressed=true] small{color:#c9cfdb}
.reset{background:none;border:0;color:#415eee;font-size:13px;text-decoration:underline;text-underline-offset:4px;min-height:40px}
.result-line{font-size:13px;color:#69717f;margin:20px 0 12px}
.q-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.q-card{position:relative;display:grid;gap:12px;align-content:start;padding:24px;border-radius:22px;background:#f3f6fb;border:1px solid transparent;transition:border-color .16s,transform .16s,background .16s}
.q-card:hover{border-color:#cdd8ee;background:#eef3fb;transform:translateY(-2px)}
.q-card h2{font-size:19px;line-height:1.35;letter-spacing:-.02em;margin:0}
.q-link:after{content:'';position:absolute;inset:0;border-radius:22px}
.q-link:focus-visible{outline:none}.q-link:focus-visible:after{outline:2px solid #415eee;outline-offset:3px}
.q-card time{font-size:11px;color:#8a93a4}
.q-meta{display:flex;flex-wrap:wrap;gap:6px}
.badge{font-size:11px;padding:4px 10px;border-radius:999px;background:#e3e9f5;color:#435474;white-space:nowrap}
.badge.cat-tech{background:#e2e9ff;color:#2f47bf}.badge.cat-coding{background:#e1f3ea;color:#1f6f4b}.badge.cat-system{background:#f3e8fb;color:#6b3a8f}.badge.cat-behavior{background:#fdf0e1;color:#8a5216}
.badge.level{background:#fff;border:1px solid #d9e0ec}
.q-tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:11px;color:#5d6880;padding:3px 9px;border-radius:999px;border:1px solid #d7deea;background:#fff}
a.tag:hover{border-color:#415eee;color:#415eee}
.q-empty{padding:40px;text-align:center;border-radius:22px;background:#f3f6fb;color:#626873}
.pager{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin:30px 0 10px}
.pager button[disabled]{opacity:.4;cursor:default}
.bank-cta{text-align:center;background:#edf3fd;border-radius:32px;padding:64px 25px;margin:70px 0 10px}
.bank-cta h2 span{color:#7285a8}.bank-cta p{max-width:520px;margin:0 auto 28px;color:#626873}
/* answer page */
.q-page{padding-top:40px}
.back{display:inline-block;font-size:14px;color:#415eee;margin-bottom:24px}
.q-head{max-width:900px;margin-bottom:34px}.q-head h1{font-size:clamp(30px,3.4vw,46px);line-height:1.15;margin-top:16px}
.q-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}
.q-main{display:grid;gap:18px}
.answer-card{border-radius:24px;background:#f3f6fb;padding:30px}
.answer-card h2{font-size:22px;margin:0 0 16px;letter-spacing:-.025em}
.answer-card h3{font-size:17px;margin:26px 0 10px;letter-spacing:-.015em}
.answer-card p,.answer-card li{font-size:17px;color:#3a4252}
.points{margin:0 0 18px}.points li{margin:9px 0;padding-left:22px;position:relative}
.points li:before{content:'';position:absolute;left:2px;top:.62em;width:7px;height:7px;border-radius:50%;background:#415eee;margin:0}
.summary{font-weight:600;color:var(--sc-ink)!important;margin:0}
.spoken{background:#fff;border:1px solid #dfe6f3;box-shadow:0 16px 50px #4b638f12}
.spoken .answer-top{gap:10px;margin-bottom:12px}.spoken .answer-top h2{margin:0;font-size:19px}
.spoken p{font-size:19px;line-height:1.6;color:var(--sc-ink);margin:0}
.detail summary{list-style:none;display:flex;justify-content:space-between}
.detail summary h2{margin:0}
.detail[open] summary{margin-bottom:6px}
.keys li{margin:12px 0}.keys li:before,.pitfalls li:before{margin-right:10px}
.pitfalls li:before{content:'!';color:#b5651d;font-weight:700}
.code{background:#1f2430;color:#e6e9f0;border-radius:16px;padding:20px;overflow:auto;font:14px/1.6 Consolas,"Cascadia Mono",monospace;margin:0}
.answer-card code,.q-card code{font-family:Consolas,"Cascadia Mono",monospace;font-size:.9em;background:#e3e9f5;border-radius:6px;padding:1px 6px}
.code code{background:none;padding:0;font-size:inherit}
.q-side{display:grid;gap:14px;position:sticky;top:20px}
.side-block{border:1px solid var(--line);border-radius:20px;padding:20px}
.side-block h2{font-size:13px;letter-spacing:.02em;color:#69717f;margin:0 0 12px;font-weight:600}
.side-block p{margin:0;font-size:15px}
.side-cta{background:#edf3fd;border-color:#edf3fd}.side-cta h2{color:var(--sc-ink);font-size:17px}.side-cta p{color:#626873;margin-bottom:16px}
.related{margin-top:60px;border-top:1px solid var(--line);padding-top:40px}
.related h2{font-size:28px}
.related ul{margin:0}.related li{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding:16px 0;margin:0}
.related li:before{content:none}
.related a{font-family:var(--sc-font-display);font-size:17px}.related a:hover{color:#415eee}
.related span{font-size:12px;color:#8a93a4;white-space:nowrap}
@media(max-width:900px){.q-layout{grid-template-columns:1fr}.q-side{position:static}.q-list{grid-template-columns:1fr}}
@media(max-width:650px){.bank-hero{padding:40px 0 24px}.bank-hero h1{font-size:36px}.filters-toggle{display:block}.filters{display:none}.filters.open{display:grid}.search input{font-size:15px;min-height:46px}.q-card{padding:20px}.q-card h2{font-size:17px}.answer-card{padding:22px}.spoken p{font-size:17px}.related li{flex-direction:column;gap:4px}.bank-cta{padding:48px 20px}.tag-panel{position:fixed;left:16px;right:16px;top:auto;bottom:16px;width:auto;max-height:60vh}}
@media(prefers-reduced-motion:reduce){.q-card,.chips button{transition:none}.q-card:hover{transform:none}}
.requisites{font-size:12px;color:#8a93a4;margin:-24px auto 30px}