/* ==========================================================================
   YKS Fizik — sitenin gazete diliyle okuma sayfaları, oyunların "defter" diliyle çalışma araçları.
   Temanın değişkenlerini (--ink, --rule, --serif, --sans, --accent) kullanır; tema stillerine dokunmaz.
   ========================================================================== */
.yks {
  --y-ink: var(--ink, #121212);
  --y-ink-2: var(--ink-2, #363636);
  --y-muted: var(--muted, #727272);
  --y-rule: var(--rule, #dfdfdf);
  --y-tint: var(--tint, #f7f7f5);
  --y-paper: var(--paper, #ffffff);
  --y-accent: var(--accent, #326891);
  --y-serif: var(--serif, "Source Serif 4", Georgia, serif);
  --y-sans: var(--sans, "Libre Franklin", "Helvetica Neue", Arial, sans-serif);
  --y-nb: "Bricolage Grotesque", "Libre Franklin", system-ui, sans-serif;
  --y-grid: #e3eaf5;
  --y-grid-2: #c9d6ec;
  --y-hl: #ffd23f;
  --y-tyt: #ffd23f;
  --y-ayt: #c3a6ff;
  --y-ok: #1f7a43;
  --y-ok-bg: #dcf2e4;
  --y-bad: #b3261e;
  --y-bad-bg: #fbe2df;
  --y-border: 2.5px solid var(--y-ink);
  --y-shadow: 4px 4px 0 var(--y-ink);
  display: block;
  color: var(--y-ink);
}
.yks *, .yks *::before, .yks *::after { box-sizing: border-box; }
.yks h1, .yks h2, .yks h3 { text-wrap: balance; }
.yks :focus-visible { outline: 3px solid var(--y-accent); outline-offset: 2px; }

/* ---------- bölüm içi gezinme ---------- */
.yks-subnav { border-bottom: 1px solid var(--y-rule); background: var(--y-paper); }
.yks-subnav .wrap { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.yks-subnav .wrap::-webkit-scrollbar { display: none; }
.yks-subnav a { flex: none; padding: 12px 12px 10px; font: 600 14px var(--y-sans); color: var(--y-muted); text-decoration: none; border-bottom: 3px solid transparent; white-space: nowrap; }
.yks-subnav a:hover { color: var(--y-ink); }
.yks-subnav a[aria-current="page"] { color: var(--y-ink); border-bottom-color: var(--y-ink); }

/* ---------- başlık alanı ---------- */
.yks-hero { padding-block: 34px 26px; border-bottom: 3px double var(--y-ink); }
.yks-hero-sm { padding-block: 22px 20px; }
.yks-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; align-items: end; }
.yks-kicker { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font: 700 12px/1.2 var(--y-sans); letter-spacing: .12em; text-transform: uppercase; color: var(--y-accent); }
.yks-hero h1, .yks-art-head h1 { font: 700 clamp(34px, 6vw, 60px)/1.03 var(--y-serif); letter-spacing: -.012em; margin: 10px 0 12px; }
.yks-hero-sm h1 { font-size: clamp(30px, 4.6vw, 46px); }
.yks-dek { font: 400 19px/1.5 var(--y-serif); color: var(--y-ink-2); max-width: 64ch; margin: 0; }
.yks-start { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.yks-facts { display: flex; gap: 0; margin: 0; border: var(--y-border); border-radius: 12px; box-shadow: var(--y-shadow); overflow: hidden; background: var(--y-paper); font-family: var(--y-nb); }
.yks-facts div { flex: 1 1 0; padding: 14px 22px; border-right: 2px solid var(--y-ink); text-align: center; }
.yks-facts div:last-child { border-right: 0; }
.yks-facts dt { font: 700 11px var(--y-sans); letter-spacing: .1em; text-transform: uppercase; color: var(--y-muted); }
.yks-facts dd { margin: 4px 0 0; font: 800 34px/1 var(--y-nb); font-variant-numeric: tabular-nums; }
.yks-crumbs { display: flex; gap: 8px; flex-wrap: wrap; font: 600 12px var(--y-sans); color: var(--y-muted); margin-bottom: 6px; }
.yks-crumbs a { color: var(--y-muted); text-decoration: none; }
.yks-crumbs a:hover { color: var(--y-ink); text-decoration: underline; }

/* ---------- düğmeler, etiketler ---------- */
.yks-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; border: var(--y-border); border-radius: 10px; background: var(--y-paper); color: var(--y-ink); font: 700 14px/1.2 var(--y-nb); text-decoration: none; cursor: pointer; box-shadow: 2px 2px 0 var(--y-ink); transition: transform .1s, box-shadow .1s; }
.yks-btn:hover { transform: translate(-1px, -1px); box-shadow: 3px 3px 0 var(--y-ink); }
.yks-btn:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--y-ink); }
.yks-btn-dark { background: var(--y-ink); color: var(--y-paper); }
.yks-btn-block { display: flex; width: 100%; margin-top: 12px; }
.yks-btn:disabled { opacity: .45; cursor: default; transform: none; box-shadow: 2px 2px 0 var(--y-ink); }
.yks-btn.is-on { background: var(--y-ok-bg); }
.yks-chip { display: inline-block; padding: 1px 9px; border: 1.5px solid #1b1b1b; border-radius: 999px; font: 800 11px/1.6 var(--y-nb); letter-spacing: .03em; color: #1b1b1b; background: var(--y-paper); vertical-align: middle; }
.yks-chip-tyt { background: var(--y-tyt); }
.yks-chip-ayt { background: var(--y-ayt); }
.yks-tag { display: inline-block; font: 600 12px var(--y-sans); color: var(--y-ink-2); }
.yks-label { font: 700 11px/1.3 var(--y-sans); letter-spacing: .1em; text-transform: uppercase; color: var(--y-muted); }
.yks-box { background: var(--y-paper); border: var(--y-border); border-radius: 14px; box-shadow: var(--y-shadow); }
.yks-member { font: 400 13px/1.5 var(--y-sans); color: var(--y-ink-2); margin: 14px 0 0; }
.yks-member a { color: var(--y-accent); font-weight: 700; }
.yks-member-on { color: var(--y-ok); }

/* defter yüzeyi */
.nb-surface { background-color: #fbf7ee; background-image: linear-gradient(var(--y-grid) 1px, transparent 1px), linear-gradient(90deg, var(--y-grid) 1px, transparent 1px), linear-gradient(var(--y-grid-2) 1px, transparent 1px), linear-gradient(90deg, var(--y-grid-2) 1px, transparent 1px); background-size: 12px 12px, 12px 12px, 60px 60px, 60px 60px; }

/* ---------- merkez ---------- */
.yks-band { padding-block: 22px; }
.yks-exam-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-block: 1px solid var(--y-rule); }
.yks-ef { padding: 16px 20px; border-right: 1px solid var(--y-rule); }
.yks-ef:last-child { border-right: 0; }
.yks-ef-top { display: flex; gap: 8px; align-items: center; font: 600 13px var(--y-sans); color: var(--y-ink-2); }
.yks-ef-num { margin: 8px 0 4px; font: 400 15px var(--y-sans); color: var(--y-ink-2); }
.yks-ef-num b { font: 800 30px/1 var(--y-nb); color: var(--y-ink); margin-right: 4px; font-variant-numeric: tabular-nums; }
.yks-ef-num span { display: block; font-size: 12px; color: var(--y-muted); margin-top: 2px; }
.yks-ef p { margin: 0; font: 400 15px/1.5 var(--y-serif); color: var(--y-ink-2); }
.yks-hub { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: 36px; padding-block: 8px 40px; }
.yks-hub-main { display: grid; gap: 34px; align-content: start; }
.yks-hub-exam > header { display: flex; align-items: center; gap: 10px; border-bottom: 2px solid var(--y-ink); padding-bottom: 8px; flex-wrap: wrap; }
.yks-hub-exam h2 { margin: 0; font: 700 26px/1.2 var(--y-serif); }
.yks-hub-exam h2 a { color: inherit; text-decoration: none; }
.yks-hub-exam h2 a:hover { text-decoration: underline; text-underline-offset: 4px; }
.yks-prog-txt { margin-left: auto; font: 600 13px var(--y-sans); color: var(--y-muted); }
.yks-toplist { list-style: none; margin: 0; padding: 0; columns: 2; column-gap: 28px; }
.yks-toplist li { break-inside: avoid; }
.yks-toplist a { display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; grid-template-rows: auto auto; column-gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--y-rule); color: inherit; text-decoration: none; }
.yks-toplist a:hover .yks-tl-t { text-decoration: underline; text-underline-offset: 3px; }
.yks-tl-n { grid-row: span 2; width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--y-ink); display: grid; place-items: center; font: 800 12px var(--y-nb); }
.yks-tl-t { font: 600 16px/1.3 var(--y-serif); }
.yks-tl-s { grid-column: 3; grid-row: 1; font: 600 12px var(--y-sans); color: var(--y-muted); white-space: nowrap; }
.yks-tl-bar { grid-column: 2 / 4; grid-row: 2; height: 4px; border-radius: 2px; background: var(--y-tint); margin-top: 6px; overflow: hidden; }
.yks-tl-bar i { display: block; height: 100%; width: 0; background: var(--y-ok); border-radius: 2px; transition: width .4s; }
li.is-studied .yks-tl-n, .is-studied .yks-tc-n { background: var(--y-ok); border-color: var(--y-ok); color: #fff; }
.yks-side { display: grid; gap: 20px; align-content: start; }
.yks-daily { padding: 18px; }
.yks-daily .yks-q { border: 0; padding: 0; margin-top: 8px; background: none; box-shadow: none; }
.yks-mystats { padding: 18px; }
.yks-mystats dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin: 10px 0 0; }
.yks-mystats dt { font: 600 11px var(--y-sans); color: var(--y-muted); }
.yks-mystats dd { margin: 2px 0 0; font: 800 26px/1.1 var(--y-nb); font-variant-numeric: tabular-nums; }
.yks-tools { display: grid; gap: 12px; }
.yks-tool { display: flex; gap: 12px; align-items: center; padding: 12px 14px; color: inherit; text-decoration: none; font-family: var(--y-nb); transition: transform .12s, box-shadow .12s; }
.yks-tool:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--y-ink); }
.yks-ic { flex: none; width: 42px; height: 42px; display: grid; place-items: center; border: 2px solid var(--y-ink); border-radius: 10px; background: var(--y-hl); color: #1b1b1b; font: 800 18px var(--y-nb); }
.yks-tool b { display: block; font: 800 16px var(--y-nb); }
.yks-tool span span { font: 400 13px/1.4 var(--y-sans); color: var(--y-ink-2); }
.yks-howto { padding-block: 10px 48px; }
.yks-howto h2 { font: 700 26px var(--y-serif); border-top: 2px solid var(--y-ink); padding-top: 14px; margin: 0 0 12px; }
.yks-howto ol { margin: 0; padding: 0; list-style: none; counter-reset: h; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; }
.yks-howto li { counter-increment: h; font: 400 16px/1.55 var(--y-serif); color: var(--y-ink-2); }
.yks-howto li::before { content: counter(h); display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--y-ink); color: var(--y-paper); font: 800 14px var(--y-nb); margin-bottom: 8px; }
.yks-howto b { color: var(--y-ink); }

/* ---------- sınav sayfası ---------- */
.yks-grid-topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; padding-block: 26px 48px; }
.yks-topic-card { display: flex; gap: 14px; padding: 16px; color: inherit; text-decoration: none; transition: transform .12s, box-shadow .12s; }
.yks-topic-card:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--y-ink); }
.yks-tc-n { flex: none; width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--y-ink); display: grid; place-items: center; font: 800 14px var(--y-nb); }
.yks-tc-body { display: flex; flex-direction: column; gap: 4px; min-width: 0; flex: 1; }
.yks-tc-body b { font: 700 19px/1.25 var(--y-serif); }
.yks-tc-body > span:not(.yks-tc-meta):not(.yks-tl-bar) { font: 400 14px/1.45 var(--y-sans); color: var(--y-ink-2); }
.yks-tc-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; font: 600 12px var(--y-sans); color: var(--y-muted); }
.yks-tc-state { color: var(--y-ok); }
.yks-topic-card .yks-tl-bar { margin-top: 8px; }

/* ---------- konu sayfası ---------- */
.yks-topic { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 44px; padding-block: 28px 56px; }
.yks-toc-in { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 20px); }
.yks-toc ol { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 2px; border-left: 2px solid var(--y-rule); }
.yks-toc a { display: block; padding: 6px 12px; margin-left: -2px; border-left: 2px solid transparent; font: 600 14px var(--y-sans); color: var(--y-ink-2); text-decoration: none; }
.yks-toc a:hover, .yks-toc a.on { color: var(--y-ink); border-left-color: var(--y-ink); }
.yks-toc .yks-btn { font-size: 13px; padding: 9px 12px; }
.yks-article { max-width: 760px; min-width: 0; }
.yks-art-head { border-bottom: 3px double var(--y-ink); padding-bottom: 18px; margin-bottom: 24px; }
.yks-art-head h1 { font-size: clamp(32px, 5vw, 50px); }
.yks-keybox { border-top: 3px solid var(--y-ink); background: var(--y-tint); padding: 16px 20px; margin: 0 0 28px; }
.yks-keybox ul { margin: 8px 0 0; padding-left: 20px; font: 400 17px/1.55 var(--y-serif); }
.yks-keybox li { margin-bottom: 4px; }
.yks-body { font: 400 19px/1.65 var(--y-serif); }
.yks-body p { margin: 0 0 18px; max-width: 66ch; }
.yks-body h3 { font: 700 24px/1.25 var(--y-serif); margin: 34px 0 10px; }
.yks-body ul, .yks-body ol { padding-left: 1.3em; margin: 0 0 18px; }
.yks-body li { margin-bottom: 6px; }
.yks-body strong { font-weight: 700; }
.yks-eq { margin: 6px 0 20px; padding: 12px 16px; background: var(--y-tint); border-radius: 8px; overflow-x: auto; }
.yks-fig { margin: 8px 0 24px; }
.yks-fig img { display: block; width: 100%; height: auto; border: 1px solid var(--y-rule); border-radius: 10px; background: #fff; }
.yks-fig figcaption { font: 400 13px/1.45 var(--y-sans); color: var(--y-muted); margin-top: 8px; }
.yks-formulas, .yks-examples, .yks-mistakes, .yks-life, .yks-test { margin-top: 40px; }
.yks-formulas h2, .yks-examples h2, .yks-mistakes h2, .yks-test h2 { font: 700 28px/1.2 var(--y-serif); margin: 0 0 14px; }
.yks-flist { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.yks-fitem { border: var(--y-border); border-radius: 12px; background: var(--y-paper); box-shadow: var(--y-shadow); padding: 12px 16px; display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.yks-ftex { overflow-x: auto; font-size: 19px; }
.yks-ftex .katex-display { margin: 4px 0; }
.yks-fnote { font: 400 14px/1.45 var(--y-sans); color: var(--y-ink-2); border-top: 1px dashed var(--y-rule); padding-top: 8px; }
.yks-ex { border: 1px solid var(--y-rule); border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; }
.yks-ex-h { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; margin-bottom: 8px; }
.yks-ex-n { font: 800 12px var(--y-nb); letter-spacing: .06em; text-transform: uppercase; background: var(--y-ink); color: var(--y-paper); padding: 3px 8px; border-radius: 4px; }
.yks-ex-h b { font: 700 18px var(--y-serif); }
.yks-ex-q { font: 400 18px/1.6 var(--y-serif); margin-bottom: 12px; }
.yks-ex-q p { margin: 0 0 10px; }
.yks-steps { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 10px; counter-reset: s; }
.yks-steps li { counter-increment: s; display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 10px; font: 400 17px/1.55 var(--y-serif); }
.yks-steps li::before { content: counter(s); width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--y-ink); display: grid; place-items: center; font: 800 12px var(--y-nb); margin-top: 1px; }
.yks-ans { margin: 14px 0 0; padding: 10px 14px; background: var(--y-ok-bg); border-radius: 8px; font: 400 17px var(--y-serif); }
.yks-mistakes ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.yks-mistakes li { border-left: 4px solid var(--y-bad); background: var(--y-bad-bg); padding: 12px 16px; font: 400 17px/1.5 var(--y-serif); border-radius: 0 8px 8px 0; }
.yks-life { border-top: 2px solid var(--y-ink); padding-top: 12px; font: 400 18px/1.6 var(--y-serif); }
.yks-life p { margin: 6px 0 0; }
.yks-test { padding: 26px 20px; border-radius: 16px; border: var(--y-border); }
.yks-test > header p { font: 400 15px var(--y-sans); color: var(--y-ink-2); margin: 0 0 6px; }
.yks-test-score { font: 800 16px var(--y-nb); margin-bottom: 14px; min-height: 1.3em; }
.yks-test .yks-q { margin-bottom: 16px; }
.yks-pn { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 40px; }
.yks-pn a { display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; border: 1px solid var(--y-rule); border-radius: 12px; color: inherit; text-decoration: none; }
.yks-pn a:hover { border-color: var(--y-ink); }
.yks-pn a.next { text-align: right; }
.yks-pn span { font: 600 12px var(--y-sans); color: var(--y-muted); }
.yks-pn b { font: 700 18px/1.3 var(--y-serif); }

/* ---------- soru kartı ---------- */
.yks-q { background: var(--y-paper); border: var(--y-border); border-radius: 14px; box-shadow: var(--y-shadow); padding: 18px 20px; font-family: var(--y-nb); }
.yks-q-top { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.yks-q-n { width: 30px; height: 30px; border-radius: 8px; background: var(--y-ink); color: var(--y-paper); display: grid; place-items: center; font: 800 14px var(--y-nb); }
.yks-diff { margin-left: auto; font: 700 11px var(--y-sans); letter-spacing: .06em; text-transform: uppercase; color: var(--y-muted); }
.yks-diff-1::before, .yks-diff-2::before, .yks-diff-3::before { content: "●○○"; letter-spacing: 1px; margin-right: 5px; color: var(--y-ink); }
.yks-diff-2::before { content: "●●○"; }
.yks-diff-3::before { content: "●●●"; }
.yks-q-stem { font: 400 19px/1.55 var(--y-serif); margin: 0 0 14px; }
.yks-q-stem p { margin: 0 0 10px; }
.yks-q-stem .yks-fig { margin: 10px 0; max-width: 420px; }
.yks-opts { display: grid; gap: 8px; }
.yks-opt { display: flex; gap: 12px; align-items: center; width: 100%; text-align: left; padding: 10px 12px; border: 2px solid var(--y-ink); border-radius: 10px; background: var(--y-paper); color: var(--y-ink); font: 500 17px/1.35 var(--y-nb); cursor: pointer; transition: background .12s; }
.yks-opt:hover:not(:disabled) { background: var(--y-tint); }
.yks-opt-l { flex: none; width: 30px; height: 30px; border-radius: 50%; border: 2px solid var(--y-ink); display: grid; place-items: center; font: 800 14px var(--y-nb); }
.yks-opt-t { min-width: 0; }
.yks-opt.is-sel { background: var(--y-tint); box-shadow: inset 0 0 0 2px var(--y-ink); }
.yks-opt.is-right { background: var(--y-ok-bg); border-color: var(--y-ok); }
.yks-opt.is-right .yks-opt-l { background: var(--y-ok); border-color: var(--y-ok); color: #fff; }
.yks-opt.is-wrong { background: var(--y-bad-bg); border-color: var(--y-bad); }
.yks-opt.is-wrong .yks-opt-l { background: var(--y-bad); border-color: var(--y-bad); color: #fff; }
.yks-opt:disabled { cursor: default; }
.yks-explain { margin-top: 14px; padding-top: 12px; border-top: 2px dashed var(--y-ink); font: 400 17px/1.6 var(--y-serif); }
.yks-explain p { margin: 0 0 8px; }
.yks-verdict { font: 800 16px var(--y-nb) !important; margin: 0 0 6px !important; }
.yks-verdict.ok { color: var(--y-ok); }
.yks-verdict.no { color: var(--y-bad); }

/* ---------- oynatıcılar (soru bankası, deneme) ---------- */
.yks-player-wrap { padding-block: 30px 48px; border-top: var(--y-border); }
.yks-filters { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin: 0 auto 20px; max-width: 860px; }
.yks-filters label { display: flex; flex-direction: column; gap: 4px; font: 700 11px var(--y-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--y-ink-2); }
.yks-filters select { min-width: 150px; max-width: 100%; padding: 8px 10px; border: 2px solid var(--y-ink); border-radius: 10px; background: var(--y-paper); color: var(--y-ink); font: 600 15px var(--y-nb); text-transform: none; letter-spacing: 0; }
.yks-player { max-width: 760px; margin: 0 auto; padding: 22px; }
.yks-player .yks-q { border: 0; box-shadow: none; padding: 0; }
.yks-loading, .yks-empty { font: 400 17px var(--y-serif); color: var(--y-ink-2); text-align: center; margin: 10px 0; }
.yks-pnav { display: flex; gap: 8px; justify-content: space-between; align-items: center; margin-top: 18px; flex-wrap: wrap; }
.yks-pnav .yks-pos { font: 600 14px var(--y-nb); font-variant-numeric: tabular-nums; color: var(--y-ink-2); }
.yks-session { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin: 16px auto 0; font: 700 15px var(--y-nb); font-variant-numeric: tabular-nums; }
.yks-session .ok { color: var(--y-ok); } .yks-session .no { color: var(--y-bad); }
.yks-player-wrap > .wrap > .yks-member { text-align: center; }

.yks-exam { max-width: 780px; margin: 0 auto; }
.yks-exam-start { padding: 24px; text-align: center; font-family: var(--y-nb); }
.yks-exam-start h2 { margin: 0 0 10px; font: 800 26px var(--y-nb); }
.yks-exam-start ul { list-style: none; margin: 0 0 18px; padding: 0; display: grid; gap: 4px; font: 400 16px var(--y-sans); color: var(--y-ink-2); }
.yks-best { font: 600 14px var(--y-sans); color: var(--y-ok); margin: 12px 0 0; min-height: 1.2em; }
.yks-exam-bar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; padding: 10px 12px; margin-bottom: 14px; background: #fbf7ee; border: var(--y-border); border-radius: 12px; }
.yks-timer { font: 800 26px/1 var(--y-nb); font-variant-numeric: tabular-nums; min-width: 4.2ch; }
.yks-timer.is-low { color: var(--y-bad); }
.yks-dots { display: flex; gap: 6px; flex-wrap: wrap; }
.yks-dots button { width: 34px; height: 34px; border: 2px solid var(--y-ink); border-radius: 8px; background: var(--y-paper); color: var(--y-ink); font: 800 13px var(--y-nb); cursor: pointer; }
.yks-dots button.is-ans { background: var(--y-ink); color: var(--y-paper); }
.yks-dots button.is-cur { box-shadow: 0 0 0 3px var(--y-hl); }
.yks-exam .yks-q { margin-bottom: 0; }
.yks-result { padding: 24px; }
.yks-result h2 { margin: 0 0 4px; font: 800 34px/1.1 var(--y-nb); }
.yks-score { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin: 16px 0 18px; }
.yks-score div { border: 2px solid var(--y-ink); border-radius: 10px; padding: 10px; text-align: center; }
.yks-score b { display: block; font: 800 28px/1 var(--y-nb); font-variant-numeric: tabular-nums; }
.yks-score span { font: 600 12px var(--y-sans); color: var(--y-ink-2); }
.yks-report { width: 100%; border-collapse: collapse; font: 500 14px var(--y-sans); margin: 4px 0 20px; }
.yks-report th { text-align: left; font: 700 11px var(--y-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--y-muted); padding: 6px 4px; border-bottom: 2px solid var(--y-ink); }
.yks-report td { padding: 8px 4px; border-bottom: 1px dashed var(--y-rule); }
.yks-report td.r, .yks-report th.r { text-align: right; font-variant-numeric: tabular-nums; }
.yks-report a { color: var(--y-accent); font-weight: 700; }
.yks-review { display: grid; gap: 14px; margin-top: 10px; }
.yks-review .yks-q { box-shadow: none; }
.yks-pn-sets { max-width: 780px; margin-inline: auto; }

/* ---------- denemeler ---------- */
.yks-sets { padding-block: 26px 10px; }
.yks-sets h2 { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font: 700 26px var(--y-serif); border-bottom: 2px solid var(--y-ink); padding-bottom: 8px; margin: 0 0 16px; }
.yks-sets h2 > span:last-child { font: 600 13px var(--y-sans); color: var(--y-muted); margin-left: auto; }
.yks-set-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 14px; }
.yks-set { display: flex; gap: 12px; align-items: center; padding: 14px; color: inherit; text-decoration: none; font-family: var(--y-nb); transition: transform .12s, box-shadow .12s; }
.yks-set:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--y-ink); }
.yks-set-n { flex: none; width: 40px; height: 40px; border-radius: 10px; border: 2px solid var(--y-ink); display: grid; place-items: center; font: 800 17px var(--y-nb); background: var(--y-tint); }
.yks-set.is-done .yks-set-n { background: var(--y-ok); border-color: var(--y-ok); color: #fff; }
.yks-set-b b { display: block; font: 800 16px var(--y-nb); }
.yks-set-b span { font: 500 13px var(--y-sans); color: var(--y-muted); }
.yks-set.is-done .yks-set-b span { color: var(--y-ok); font-weight: 700; }
.yks-tip { padding-block: 22px 48px; }
.yks-tip p { font: 400 16px/1.55 var(--y-serif); color: var(--y-ink-2); max-width: 70ch; border-left: 3px solid var(--y-hl); padding-left: 14px; margin: 0; }

/* ---------- net ---------- */
.yks-netgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 980px; margin: 0 auto; }
.yks-netcard { padding: 20px; min-width: 0; }
.yks-netcard h2 { margin: 6px 0 12px; font: 800 22px var(--y-nb); }
.yks-nettable { width: 100%; border-collapse: collapse; font-family: var(--y-nb); font-variant-numeric: tabular-nums; }
.yks-nettable th, .yks-nettable td { padding: 7px 4px; text-align: left; }
.yks-nettable thead th { font: 700 11px var(--y-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--y-muted); }
.yks-nettable tbody tr { border-top: 1px dashed var(--y-rule); }
.yks-nettable tbody th { font: 700 15px var(--y-nb); }
.yks-nettable input { width: 60px; padding: 6px 8px; border: 2px solid var(--y-ink); border-radius: 8px; font: 700 16px var(--y-nb); background: var(--y-paper); color: var(--y-ink); }
.yks-nettable input.is-err { border-color: var(--y-bad); background: var(--y-bad-bg); }
.yks-nettable .r { text-align: right; }
.yks-nettable .n { font-weight: 800; font-size: 17px; }
.yks-nettable .b { color: var(--y-muted); }
.yks-nettable tfoot tr { border-top: 2.5px solid var(--y-ink); }
.yks-nettable tfoot th { font: 800 15px var(--y-nb); }
.yks-nettable tfoot .n { font-size: 22px; }
.yks-netmsg { min-height: 1.3em; margin: 8px 0 0; font: 600 13px var(--y-sans); color: var(--y-bad); }
.yks-netinfo { max-width: 720px; margin: 30px auto 0; font: 400 17px/1.6 var(--y-serif); }
.yks-netinfo h2 { font: 700 24px var(--y-serif); margin: 0 0 8px; }
.yks-netinfo p { margin: 0 0 12px; }

/* ---------- formüller ---------- */
.yks-fpage { padding-block: 24px 56px; }
.yks-fexam h2 { display: flex; gap: 10px; align-items: center; font: 700 28px var(--y-serif); border-bottom: 2px solid var(--y-ink); padding-bottom: 8px; margin: 26px 0 0; }
.yks-fgroup h3 { font: 700 20px var(--y-serif); margin: 22px 0 10px; }
.yks-fgroup h3 a { color: inherit; text-decoration: none; }
.yks-fgroup h3 a:hover { text-decoration: underline; }
.yks-fcards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.yks-fcard { position: relative; min-height: 112px; padding: 12px 16px; border: 2px solid var(--y-ink); border-radius: 12px; background: var(--y-paper); color: var(--y-ink); text-align: left; cursor: pointer; font: 600 15px/1.4 var(--y-nb); }
.yks-fcard small { display: block; margin-top: 4px; font: 400 12px var(--y-sans); color: var(--y-muted); }
.yks-fc-back { display: block; }
.yks-fc-back .katex-display { margin: 0 0 4px; text-align: left; }
.yks-fc-front { display: none; }
[data-fpage="list"] .yks-fcard { cursor: default; }
[data-fpage="list"] .yks-fcard .yks-fc-back small { display: block; }
[data-fpage="cards"] .yks-fc-front { display: block; font-size: 17px; }
[data-fpage="cards"] .yks-fc-back { display: none; }
[data-fpage="cards"] .yks-fcard { box-shadow: 3px 3px 0 var(--y-ink); }
[data-fpage="cards"] .yks-fcard.is-flip { background: var(--y-tint); }
[data-fpage="cards"] .yks-fcard.is-flip .yks-fc-front { display: none; }
[data-fpage="cards"] .yks-fcard.is-flip .yks-fc-back { display: block; }

/* ---------- dar ekranlar ---------- */
@media (max-width: 960px) {
  .yks-hub, .yks-topic { grid-template-columns: minmax(0, 1fr); }
  .yks-toc { display: none; }
  .yks-howto ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .yks-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .yks-exam-facts { grid-template-columns: minmax(0, 1fr); }
  .yks-ef { border-right: 0; border-bottom: 1px solid var(--y-rule); }
  .yks-toplist { columns: 1; }
  .yks-netgrid { grid-template-columns: minmax(0, 1fr); }
  .yks-pn { grid-template-columns: minmax(0, 1fr); }
  .yks-score { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yks-body { font-size: 18px; }
}
@media (max-width: 480px) {
  .yks-facts div { padding: 12px 14px; }
  .yks-facts dd { font-size: 28px; }
  .yks-howto ol { grid-template-columns: minmax(0, 1fr); }
  .yks-q, .yks-player { padding: 16px; }
  .yks-q-stem { font-size: 18px; }
  .yks-opt { font-size: 16px; }
  .yks-nettable input { width: 50px; }
  .yks-nettable th, .yks-nettable td { padding: 6px 2px; }
}
@media (prefers-reduced-motion: reduce) { .yks * { transition: none !important; } }