:root {
  --bg: #f6f4f1;
  --card: #ffffff;
  --ink: #1d1f24;
  --muted: #5f6470;
  --line: #e3dfd8;
  --accent: #c8102e;      /* Malta kırmızısı */
  --accent-ink: #ffffff;
  --accent-soft: #fbe9ec;
  --ok: #1d7a46;
  --ok-soft: #e4f4ea;
  --bad: #b3261e;
  --bad-soft: #fbe7e5;
  --warn: #b26a00;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 4px 16px rgba(0,0,0,.04);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171b;
    --card: #1e2127;
    --ink: #eceef2;
    --muted: #a0a6b2;
    --line: #2f333b;
    --accent: #ff4d63;
    --accent-ink: #1a0005;
    --accent-soft: #3a1a20;
    --ok: #4cc683;
    --ok-soft: #173326;
    --bad: #ff7a70;
    --bad-soft: #3a1d1b;
    --warn: #ffb547;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
img { max-width: 100%; height: auto; }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); margin: .4em 0 .3em; }
h2 { font-size: 1.35rem; margin: 1.6em 0 .6em; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.lead { font-size: 1.08rem; color: var(--muted); }
.center { text-align: center; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.row.end { justify-content: flex-end; }
.center-row { justify-content: center; }
.note { background: var(--accent-soft); padding: 8px 12px; border-radius: 10px; font-size: .9rem; margin-top: 16px; }

/* Üst menü */
.top { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.top-in { display: flex; align-items: center; gap: 16px; min-height: 58px; flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--ink); text-decoration: none; }
.nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.nav a, .langs a { text-decoration: none; color: var(--muted); padding: 6px 10px; border-radius: 8px; font-weight: 500; }
.nav a.on, .nav a:hover { color: var(--ink); background: var(--bg); }
.langs { display: flex; gap: 2px; border: 1px solid var(--line); border-radius: 10px; padding: 2px; }
.langs a { padding: 3px 8px; font-size: .82rem; }
.langs a.on { background: var(--accent); color: var(--accent-ink); }
@media (max-width: 640px) {
  .brand span { display: none; }
  .nav { order: 3; flex-basis: 100%; overflow-x: auto; flex-wrap: nowrap; }
  .langs { margin-left: auto; }
}

/* Kartlar & ızgaralar */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); margin-bottom: 14px; }
.grid2, .grid3 { display: grid; gap: 14px; }
.grid2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid3 { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.grid2 .card, .grid3 .card { margin: 0; }
.veh { text-align: center; }
.veh h3 { margin: .3em 0 0; }
.veh .row { justify-content: center; margin-top: 8px; }
.lesson-card { display: flex; gap: 14px; align-items: flex-start; text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.lesson-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.lesson-card small { display: block; color: var(--muted); font-size: .88rem; margin-top: 2px; }
.ico { font-size: 1.6rem; line-height: 1; }
.sec { color: var(--muted); text-transform: uppercase; letter-spacing: .06em; font-size: .85rem; margin: 1.8em 0 .7em; }

/* Kahraman bölüm */
.hero { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 28px 0 8px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.steps li { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.steps b { width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; }
@media (max-width: 640px) { .hero { grid-template-columns: 1fr; } .steps { grid-auto-flow: column; } }

/* Butonlar */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent);
  padding: 10px 18px; border-radius: 10px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn:hover { filter: brightness(1.05); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.small { padding: 6px 12px; font-size: .9rem; }
.btn.big { padding: 14px 30px; font-size: 1.1rem; }
.btn.danger { background: var(--ink); border-color: var(--ink); color: var(--bg); }

/* Sekmeler */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 12px 0 16px; }
.tabs a { display: flex; align-items: center; gap: 6px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; color: var(--muted); background: var(--card); font-weight: 500; }
.tabs a.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* Ders içeriği */
.prose { padding: 22px clamp(18px, 4vw, 36px); }
.prose h1 { margin-top: 0; }
.prose h2 { font-size: 1.25rem; border-top: 1px solid var(--line); padding-top: 1em; }
.prose h3 { font-size: 1.08rem; }
.prose li { margin: .25em 0; }
.prose figure { margin: 1.2em 0; text-align: center; }
.prose figure img { background: #fff; border-radius: 10px; border: 1px solid var(--line); }
.prose figcaption { color: var(--muted); font-size: .9rem; margin-top: 6px; }
.prose table { border-collapse: collapse; width: 100%; font-size: .95rem; }
.prose th, .prose td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.prose th { background: var(--bg); }
.prose .tip, .prose .warn, .prose .fail { border-radius: 10px; padding: 10px 14px; margin: 1em 0; }
.prose .tip { background: var(--ok-soft); border-left: 4px solid var(--ok); }
.prose .warn { background: #fff4e0; border-left: 4px solid var(--warn); }
.prose .fail { background: var(--bad-soft); border-left: 4px solid var(--bad); }
@media (prefers-color-scheme: dark) { .prose .warn { background: #3a2c12; } }
.prose ol.steps-list { counter-reset: s; list-style: none; padding-left: 0; }
.prose ol.steps-list > li { counter-increment: s; position: relative; padding-left: 40px; margin: .6em 0; }
.prose ol.steps-list > li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.table-wrap { overflow-x: auto; }
.crumb { margin: 16px 0 6px; }
.crumb a { text-decoration: none; }
.pager { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }

/* Sorular */
.quiz { min-height: 300px; }
.qhead { margin-bottom: 8px; }
.qnum { color: var(--muted); font-size: .9rem; font-weight: 600; }
.qtext { font-size: 1.15rem; font-weight: 600; margin: .5em 0 .8em; }
.qimg { display: block; max-height: 200px; margin: 0 auto 14px; }
.progress { height: 4px; background: var(--line); border-radius: 4px; overflow: hidden; }
.progress i { display: block; height: 100%; background: var(--accent); transition: width .3s; }
.opts { display: grid; gap: 8px; margin-bottom: 14px; }
.opt { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 12px;
  background: var(--card); color: var(--ink); font: inherit; text-align: left; cursor: pointer; width: 100%; }
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt input { position: absolute; opacity: 0; pointer-events: none; }
.opt:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.opt:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.letter { flex: none; width: 28px; height: 28px; border-radius: 8px; border: 1.5px solid var(--line); display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.opt:has(input:checked) .letter { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.opt.right { border-color: var(--ok); background: var(--ok-soft); }
.opt.right .letter { background: var(--ok); border-color: var(--ok); color: #fff; }
.opt.chosen-wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt.chosen-wrong .letter { background: var(--bad); border-color: var(--bad); color: #fff; }
.opt:disabled { cursor: default; }
.verdict { font-weight: 700; font-size: 1.1rem; margin: 0 0 4px; }
.verdict.ok { color: var(--ok); }
.verdict.bad { color: var(--bad); }
.expl { background: var(--bg); border-radius: 10px; padding: 10px 14px; margin: 6px 0 12px; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; background: var(--bg); color: var(--muted); }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.bad { background: var(--bad-soft); color: var(--bad); }

/* Sınav */
fieldset.q { border: 1px solid var(--line); min-width: 0; }
fieldset.q legend { padding: 0; float: left; width: 100%; }
.exam-bar { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; position: sticky; top: 64px; z-index: 5; padding: 10px 16px; margin-top: 16px; }
@media (max-width: 640px) { .exam-bar { top: 100px; } }
#timer.warn { color: var(--bad); }
.qnav { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 5px; margin-bottom: 14px; }
.qnav button { height: 34px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--muted); font: inherit; font-size: .85rem; cursor: pointer; }
.qnav button.done { background: var(--accent-soft); color: var(--ink); border-color: transparent; }
.qnav button.cur { border-color: var(--accent); color: var(--accent); font-weight: 700; }
.exam-start img { margin-top: 8px; }

/* Sonuç */
.result { padding: 28px 18px; }
.badge { display: inline-block; font-weight: 800; letter-spacing: .1em; padding: 6px 18px; border-radius: 999px; }
.result.pass .badge { background: var(--ok-soft); color: var(--ok); }
.result.fail .badge { background: var(--bad-soft); color: var(--bad); }
.bigscore { font-size: 3.6rem; font-weight: 800; line-height: 1.1; margin: 10px 0; }
.bigscore small { font-size: 1.6rem; color: var(--muted); }
.review.ok { border-left: 4px solid var(--ok); }
.review.bad { border-left: 4px solid var(--bad); }
.only-wrong .review.ok { display: none; }
.toggle { display: flex; gap: 6px; align-items: center; cursor: pointer; }
.grid2, .grid3 { margin-bottom: 14px; }
.stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stats .card { text-align: center; padding: 12px 8px; }
.stats small { display: block; color: var(--muted); font-size: .85rem; }
.stats b { font-size: 1.7rem; line-height: 1.3; }
.table-wrap { padding: 6px 12px; }
table { border-collapse: collapse; width: 100%; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; }
tbody tr:last-child td { border-bottom: 0; }
th { font-size: .85rem; color: var(--muted); font-weight: 600; }
.pill { white-space: nowrap; }
.show-sm { display: none; }
@media (max-width: 640px) {
  .stats b { font-size: 1.35rem; }
  .table-wrap { padding: 2px 8px; }
  th, td { padding: 9px 5px; font-size: .88rem; }
  .hide-sm { display: none; }
  .show-sm { display: block; }
}

.foot { color: var(--muted); font-size: .85rem; padding-top: 24px; padding-bottom: 32px; text-align: center; }

/* Çoklu seçim, resimli şıklar, soru kodları */
.qmeta { float: right; font-weight: 500; color: var(--muted); font-size: .82rem; }
.multi-hint { font-weight: 600; color: var(--accent); margin: -.3em 0 .7em; font-size: .95rem; }
.opt.sel { border-color: var(--accent); background: var(--accent-soft); }
.opt.sel .letter { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.opt.right.picked { box-shadow: 0 0 0 2px var(--ok) inset; }
.img-opts { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
.img-opts .opt { flex-direction: column; justify-content: center; padding: 10px; }
.img-opts .letter { align-self: flex-start; }
.optimg { width: 96px; height: 96px; object-fit: contain; background: #fff; border-radius: 8px; }
.topic-filter { margin: -4px 0 14px; }
.topic-filter select { font: inherit; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); max-width: 100%; }
@media (max-width: 640px) { .qmeta { float: none; display: block; } }
.multi-hint.one { color: var(--muted); font-weight: 500; }
@media (max-width: 640px) {
  .tabs { flex-wrap: nowrap; overflow-x: auto; margin-left: -16px; margin-right: -16px; padding: 0 16px 4px; scrollbar-width: none; }
  .tabs a { flex: none; font-size: .9rem; padding: 7px 12px; }
}

/* Resmi belgeler: soru bankaları, formlar, banka görüntüleyici */
.bank-card h3 { margin: 0; font-size: 1.05rem; }
.bank-card .row { flex-wrap: nowrap; }
.dl { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; margin-top: 10px; }
.dl-label { font-size: .82rem; color: var(--muted); margin-right: 4px; min-width: 76px; }
.dl a { text-decoration: none; font-weight: 600; font-size: .85rem; padding: 4px 10px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); }
.dl a:hover { border-color: var(--accent); color: var(--accent); }
.bank-tools .dl { margin-top: 0; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; padding: 3px; gap: 3px; background: var(--card); margin-bottom: 10px; }
.seg a { text-decoration: none; padding: 6px 12px; border-radius: 8px; color: var(--muted); font-weight: 600; font-size: .92rem; }
.seg a.on { background: var(--accent); color: var(--accent-ink); }
.toc { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 8px; }
.toc a { text-decoration: none; font-size: .88rem; padding: 4px 10px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); color: var(--ink); }
.toc small { color: var(--muted); }
.bank-q .opt { cursor: default; }
.hide-ans .opt.right { border-color: var(--line); background: var(--card); }
.hide-ans .opt.right .letter { background: transparent; color: var(--ink); border-color: var(--line); }
.hide-ans .expl { display: none; }
.search { font: inherit; width: 100%; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); margin-bottom: 6px; }
ul.forms { list-style: none; padding: 4px 16px; }
.form-item { display: flex; justify-content: space-between; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.form-item:last-child { border-bottom: 0; }
.form-item small { display: block; color: var(--muted); margin-top: 2px; }
.form-item .dl { margin-top: 0; flex-wrap: nowrap; align-self: center; }
.form-group summary { cursor: pointer; font-weight: 700; padding: 10px 0; }
.foot a { color: inherit; }
@media (max-width: 640px) { .form-item { flex-direction: column; } .dl-label { min-width: 0; } }
@media print {
  .top, .foot, .no-print, .note, .crumb { display: none !important; }
  body { background: #fff; color: #000; }
  .card { box-shadow: none; break-inside: avoid; }
}

/* YouTube videoları: kapak + bağlantı (YouTube'da açılır) */
.videos { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-bottom: 20px; }
.video { display: block; text-decoration: none; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; transition: border-color .15s, transform .15s; }
.video:hover { border-color: var(--accent); transform: translateY(-1px); }
.vthumb { position: relative; display: block; aspect-ratio: 16 / 9; background: #000; }
.vthumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.vplay { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 54px; height: 38px; border-radius: 10px; background: rgba(200, 16, 46, .92); color: #fff; display: grid; place-items: center; font-size: 1.1rem; }
.vbadge { position: absolute; right: 8px; top: 8px; background: rgba(0, 0, 0, .7); color: #fff; font-size: .72rem; font-weight: 700; padding: 2px 8px; border-radius: 6px; }
.vcap { display: block; padding: 10px 12px; }
.vcap b { display: block; font-size: .92rem; line-height: 1.35; }
.vcap small { display: block; color: var(--muted); margin-top: 3px; }

/* Kaynakça */
ul.refs { list-style: none; padding: 6px 18px; }
ul.refs > li { padding: 10px 0; border-bottom: 1px solid var(--line); }
ul.refs > li:last-child { border-bottom: 0; }
ul.refs small { display: block; color: var(--muted); margin-top: 2px; }
ul.refs .dl { margin-top: 8px; }
.refs-videos h3 { font-size: 1rem; margin: 1em 0 .3em; }
.refs-videos h3:first-child { margin-top: 0; }
.refs-videos h3 a { text-decoration: none; color: var(--ink); }
.refs-videos ul { margin: 0; padding-left: 20px; }
.refs-videos li { margin: .2em 0; }