/* Demo arayüzü, "Optik" yönü: optik formun dili. Baskı mürekkebi çizgiler, kurşun kalemle
   doldurulmuş balonlar. Renk ve yazı belirteçleri index.html'deki :root bloğundadır.
   Dizgi basılı bir test kitapçığı gibidir: başlıklar tırnaklı (Source Serif 4), gövde ve form
   IBM Plex Sans, sayılar ve form etiketleri Plex Mono. Ölçüler: yazı 12 / 14 / 16 / 18 / 20 /
   24 / 32 px (kahraman en çok 56); ağırlık 400 / 500 / 600; boşluk 4 / 8 / 12 / 16 / 24 / 32 /
   48; çizgi 1 px, vurguda 2 px; köşe 4 px (düğme ve çip 2 px, balonlar daire). Bölümler
   kutuyla değil çizgiyle ayrılır. Branş rengi yalnız kapak şeridi ve noktada. */

/* ---------------------------------------------------------------- temel */
* { box-sizing: border-box; }
#app { font-family: var(--f-body); font-size: 16px; line-height: 1.5; color: var(--fg); min-height: 100%; overflow-x: clip; }
#app h1, #app h2, #app h3 { margin: 0; font-weight: 600; text-wrap: balance; }
#app h1, #app h2 { font-family: var(--f-display); }
#app h1 { font-size: 34px; line-height: 40px; letter-spacing: -.005em; }
#app h2 { font-size: 26px; line-height: 32px; }
#app h3 { font-family: var(--f-body); font-size: 18px; line-height: 24px; }
#app h1 em, #app h2 em { font-style: italic; color: var(--ink); }
#app p { margin: 0; }
/* Sıfır özgüllük: bileşen sınıflarının kendi rengi ve yazı boyutu bunu ezebilsin. */
:where(#app) :where(button, input, select, textarea) { font: inherit; color: inherit; }
#app button { cursor: pointer; }
#app a { color: var(--fg); }
#app :focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* yardımcılar (satır içi stil yerine) */
.muted { color: var(--muted); }
.num { font-variant-numeric: tabular-nums; }
.row { display: flex; align-items: center; gap: 8px 12px; flex-wrap: wrap; }
.row.g4 { gap: 4px; } .row.g12 { gap: 12px; } .row.g16 { gap: 16px; } .row.g24 { gap: 24px; }
.row.nowrap { flex-wrap: nowrap; }
.row.top { align-items: flex-start; }
.row.center { justify-content: center; }
.between { justify-content: space-between; }
.stack { display: grid; gap: 12px; }
.stack.g4 { gap: 4px; } .stack.g8 { gap: 8px; } .stack.g16 { gap: 16px; }
.grow { flex: 1 1 240px; min-width: 0; }
.w-auto { width: auto; }
.w-130 { flex: 0 1 130px; }
.self-start { justify-self: start; }
.measure { max-width: 40rem; }
.t-meta { font-size: 14px; line-height: 20px; }
.t-small { font-size: 13px; line-height: 18px; }
.lead-s { font-size: 18px; line-height: 28px; }
.mb8 { margin-bottom: 8px; }
/* form alanı anlamı taşıyan etiket: eş aralıklı, büyük harf (soru no, kitapçık, tablo başlığı) */
.lbl { font-family: var(--f-label); font-size: 12px; line-height: 16px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink); }

/* ---------------------------------------------------------------- üst çubuk */
.notice { background: var(--surface-2); color: var(--muted); font-size: 13px; font-weight: 500; text-align: center; padding: 4px 16px; }
.notice { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 4px 16px; }
.demo-saat { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; color: var(--fg); }
.demo-saat .link { font-size: 13px; color: var(--ink); }
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--surface); border-bottom: 1px solid var(--line-strong); }
.top-in { max-width: 1180px; margin-inline: auto; padding: 0 16px; height: 64px; display: flex; align-items: center; gap: 32px; }
.brand { display: flex; align-items: center; gap: 8px; font-family: var(--f-display); font-weight: 600; font-size: 20px; background: none; border: 0; padding: 0; white-space: nowrap; }
.brand .bbs { gap: 4px; }
.brand .bb { width: 12px; height: 12px; }
.nav { display: flex; gap: 24px; align-self: stretch; }
.nav button, .toplink { background: none; border: 0; border-block: 2px solid transparent; padding: 0; font-weight: 500; white-space: nowrap; }
.toplink { align-self: stretch; }
.nav button[aria-current="page"], .toplink[aria-current="page"] { border-bottom-color: var(--ink); }
.hsearch { flex: 1 1 220px; min-width: 0; max-width: 420px; margin-left: auto; position: relative; display: flex; align-items: center; }
.hsearch svg { position: absolute; left: 12px; color: var(--ink); pointer-events: none; }
.hsearch input { width: 100%; height: 40px; padding: 0 12px 0 40px; border: 1px solid var(--line-strong); border-radius: var(--r); background: var(--surface); }
#app[data-route="kesfet"] .hsearch { visibility: hidden; }
.acct { display: flex; align-items: center; gap: 16px; align-self: stretch; }
.brand, .acct .link, .acct .btn { white-space: nowrap; }
.me { flex: none; width: 36px; height: 36px; border-radius: 50%; border: 0; background: var(--ink); color: var(--accent-fg); font-weight: 600; font-family: var(--f-mono); font-size: 13px; }

/* ---------------------------------------------------------------- sayfa gövdesi */
.wrap { max-width: 1180px; margin-inline: auto; padding-inline: 16px; padding-block: 32px 64px; display: grid; gap: 48px; }
.wrap > * { min-width: 0; }
.sec { display: grid; gap: 16px; min-width: 0; }
.sec-h { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.narrow { max-width: 720px; margin-inline: auto; width: 100%; }
.narrow.sm { max-width: 520px; }
.narrow.xs { max-width: 440px; }
.panel > *, .stack > *, .q > *, .note > *, .sec > *, .adm-main > *, .demo-b > * { min-width: 0; }

/* alt gezinme (telefon) */
.tabbar { display: none; }
@media (max-width: 820px) {
  .nav, .hsearch, .toplink { display: none; }
  .top-in { height: 56px; gap: 12px; justify-content: space-between; }
  .acct .btn { display: none; }
  .wrap { padding-block: 24px 104px; gap: 32px; }
  .tabbar { display: grid; grid-template-columns: repeat(4, 1fr); position: fixed; inset: auto 0 0 0; z-index: 30; background: var(--surface); border-top: 1px solid var(--line-strong); padding-bottom: env(safe-area-inset-bottom, 0px); }
  .tabbar button { background: none; border: 0; padding: 8px 2px; display: grid; justify-items: center; gap: 2px; font-size: 12px; font-weight: 500; color: var(--muted); }
  .tabbar button[aria-current="page"] { color: var(--fg); box-shadow: inset 0 2px 0 var(--ink); }
}

/* ---------------------------------------------------------------- düğmeler, çipler, alanlar */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; padding: 8px 16px; border-radius: var(--r-sm); border: 1px solid var(--ink); background: var(--ink); color: var(--accent-fg); font-weight: 500; text-decoration: none; }
.btn:hover { background: var(--pencil); border-color: var(--pencil); color: var(--paper); }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--line-strong); }
.btn.ghost:hover { background: var(--surface-2); color: var(--fg); border-color: var(--pencil); }
.btn.quiet { background: var(--surface-2); color: var(--fg); border-color: transparent; }
.btn.quiet:hover { background: var(--mark); color: var(--fg); border-color: transparent; }
.btn.sm { min-height: 32px; padding: 4px 12px; font-size: 14px; }
.btn.block { width: 100%; }
.btn[disabled], .btn[disabled]:hover { opacity: .45; cursor: not-allowed; background: var(--ink); border-color: var(--ink); color: var(--accent-fg); }
.btn.ghost[disabled], .btn.ghost[disabled]:hover { background: transparent; color: var(--fg); border-color: var(--line-strong); }
.link { background: none; border: 0; padding: 0; color: var(--fg); font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }
.link.light { font-weight: 400; }
.chip { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: var(--r-sm); font-family: var(--f-label); font-size: 12px; line-height: 16px; font-weight: 500; background: var(--surface-2); color: var(--fg); border: 0; white-space: normal; text-align: left; }
.chip.ok { background: var(--ok-soft); color: var(--ok); }
.chip.warn { background: var(--warn-soft); color: var(--warn); }
.chip.bad { background: var(--bad-soft); color: var(--bad); }
.chip.mark { background: var(--hl-band); color: var(--fg); }
button.chip { font-family: var(--f-body); font-size: 14px; line-height: 20px; padding: 4px 12px; border-radius: var(--r-sm); border: 1px solid var(--line-strong); background: var(--surface); min-height: 32px; }
button.chip:hover { border-color: var(--ink); }
button.chip.acc { background: var(--surface-2); border-color: var(--ink); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--c, var(--ink)); }
.vbadge { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; font-weight: 500; color: var(--ink); }
.rate { display: inline-flex; align-items: center; gap: 4px; font-variant-numeric: tabular-nums; }
.rate svg { color: var(--pencil); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; min-width: 0; }
.fl { display: grid; gap: 4px; font-weight: 500; font-size: 14px; line-height: 20px; }
.fl .field { font-weight: 400; }
.field { width: 100%; min-height: 40px; padding: 8px 12px; border: 1px solid var(--line-strong); border-radius: var(--r); background: var(--surface); }
.field:focus { border-color: var(--ink); }
.field.grow { width: auto; }
.field.w-auto { width: auto; }
textarea.field { min-height: 96px; }
.err { color: var(--bad); background: var(--bad-soft); font-weight: 500; padding: 8px 12px; border-radius: var(--r); }
.st-ok { color: var(--ok); font-weight: 500; }
/* durum çipi: nokta + metin */
.st { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.st::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); }
.st.on::before { background: var(--ok); }
.st.wip::before { background: var(--warn); }

/* ---------------------------------------------------------------- balonlar */
/* dolu = kurşun kalem (yardımsız), noktalı = yardımla, çapraz = yanlış */
.bbs { display: inline-flex; gap: 4px; flex-wrap: nowrap; }
.bb { display: block; width: 16px; height: 16px; border-radius: 50%; border: 1px solid var(--ink); background: var(--surface); }
.bb.s { background: var(--pencil); border-color: var(--pencil); }
.bb.a { background: radial-gradient(circle, var(--ink) 0 3.4px, var(--surface) 3.9px); }
.tbl .bbs { vertical-align: middle; }
.tbl .bb { width: 14px; height: 14px; }

/* ---------------------------------------------------------------- kurs kartı: kitapçık kapağı */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(232px, 1fr)); gap: 16px; }
.shelf { display: flex; gap: 16px; overflow-x: auto; padding-bottom: 8px; scroll-snap-type: x proximity; }
.shelf .card { flex: 0 0 248px; scroll-snap-align: start; }
.card { display: grid; grid-template-rows: auto 1fr; text-align: left; background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--r); overflow: hidden; padding: 0; min-width: 0; }
.card:hover { border-color: var(--ink); background: var(--surface-2); }
.cover { display: grid; gap: 16px; align-content: start; padding: 12px 16px 16px; color: var(--fg); background: var(--surface); border-top: 6px solid var(--c, var(--ink)); border-bottom: 1px solid var(--line); min-width: 0; }
.card:hover .cover { background: var(--surface-2); }
.cover small { order: -1; display: flex; align-items: center; gap: 8px; font-family: var(--f-label); font-size: 12px; line-height: 16px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink); }
.cover small::before { content: ""; flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--c, var(--ink)); }
.cover b { font-family: var(--f-display); font-size: 30px; line-height: 34px; font-weight: 600; overflow-wrap: anywhere; }
.cover em { font-style: normal; font-family: var(--f-label); font-size: 12px; line-height: 16px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); border-top: 1px solid var(--line); padding-top: 8px; }
.card-b { padding: 12px 16px 16px; display: grid; gap: 4px; align-content: start; }
.card-t { font-weight: 500; line-height: 24px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 48px; }
.card-m { font-size: 14px; line-height: 20px; color: var(--muted); display: flex; gap: 4px 12px; flex-wrap: wrap; align-items: center; }
.c-ing { --c: var(--ink); }
.c-kpss { --c: #2449C4; }
.c-yds { --c: #6A3FA0; }
.c-mes { --c: #C98C00; }

/* ---------------------------------------------------------------- ana sayfa (girişli) */
.due { background: var(--surface-2); border: 1px solid var(--line-strong); border-left: 4px solid var(--hl-band); border-radius: var(--r); padding: 16px 24px; display: flex; gap: 12px 24px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.due .chip { background: var(--surface); }
.cont { display: grid; grid-template-columns: 200px 1fr; gap: 24px; align-items: center; }
.cont .cover, .cta .cover { border: 1px solid var(--line-strong); border-top-width: 6px; border-top-color: var(--c, var(--ink)); border-radius: var(--r); }
.prog { display: block; height: 6px; background: var(--mark); overflow: hidden; }
.prog > i { display: block; height: 100%; background: var(--ink); }
.banner { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; }
@media (max-width: 560px) { .cont { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- keşfet */
.explore { display: grid; grid-template-columns: 248px 1fr; gap: 32px; align-items: start; }
.filters { display: grid; gap: 24px; }
.filters fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 4px; }
.filters legend { font-size: 14px; line-height: 20px; font-weight: 600; padding: 0; margin-bottom: 4px; }
.filters label { display: flex; gap: 8px; align-items: center; min-height: 32px; font-size: 14px; }
.filters input { width: 18px; height: 18px; accent-color: var(--ink); }
@media (max-width: 820px) { .explore { grid-template-columns: 1fr; } .filters { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); } }

/* ---------------------------------------------------------------- kurs sayfası */
.course { display: grid; grid-template-columns: minmax(0, 1fr) 328px; gap: 32px; align-items: start; }
.course-main { display: grid; gap: 32px; min-width: 0; }
.cta { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 88px); display: grid; gap: 12px; }
.price-lg { font-family: var(--f-display); font-size: 26px; line-height: 32px; font-weight: 600; }
.learn { display: grid; grid-template-columns: repeat(auto-fit, minmax(232px, 1fr)); gap: 8px 24px; padding: 0; margin: 0; list-style: none; }
.learn li { display: flex; gap: 8px; align-items: flex-start; }
.learn svg { color: var(--ok); flex: none; margin-top: 5px; }
details.acc { border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); overflow: hidden; }
details.acc + details.acc { margin-top: 8px; }
details.acc summary { padding: 12px 16px; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; gap: 12px; }
.les { display: flex; gap: 12px; align-items: center; min-height: 40px; padding: 8px 16px; border-top: 1px solid var(--line); width: 100%; background: none; border-inline: 0; border-bottom: 0; text-align: left; flex-wrap: wrap; }
.les:hover { background: var(--surface-2); }
.les .kind { flex: none; width: 96px; display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.les .kind svg { color: var(--ink); }
.lnk { background: none; border: 0; padding: 0; text-align: left; }
.les .ttl { flex: 1 1 160px; min-width: 0; }
.les .dur { font-family: var(--f-mono); font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.les[aria-current="true"] { background: var(--surface-2); box-shadow: inset 2px 0 0 var(--ink); }
.tick { flex: none; width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--line-strong); display: grid; place-items: center; color: transparent; background: var(--surface); padding: 0; }
.tick.on { background: var(--pencil); border-color: var(--pencil); color: var(--paper); }
.bars { display: grid; gap: 4px; }
.bars div { display: grid; grid-template-columns: 24px 1fr 40px; gap: 8px; align-items: center; font-family: var(--f-mono); font-size: 12px; }
.big-rate { font-family: var(--f-display); font-size: 32px; line-height: 40px; font-weight: 700; }
.review { border-top: 1px solid var(--line); padding-top: 12px; display: grid; gap: 4px; }
.avatar { flex: none; width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; font-family: var(--f-label); font-weight: 600; color: var(--accent-fg); background: var(--ink); }
.avatar.lg { width: 64px; height: 64px; font-size: 20px; }
.cta-bar { display: none; }
@media (max-width: 900px) {
  .course { grid-template-columns: 1fr; }
  .cta { position: static; order: -1; }
  .cta-bar { display: flex; position: fixed; inset: auto 0 calc(56px + env(safe-area-inset-bottom, 0px)) 0; z-index: 25; padding: 8px 16px; gap: 12px; align-items: center; justify-content: space-between; background: var(--surface); border-top: 1px solid var(--line-strong); }
}

/* ---------------------------------------------------------------- oynatıcı */
.player { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 24px; align-items: start; }
#app h1.h-lesson { font-size: 24px; line-height: 32px; }
/* sahne: nötr koyu zemin, demo yer tutucusunda soluk kareli desen */
.stage { max-width: 100%; border-radius: var(--r); background-color: var(--stage); background-image: repeating-linear-gradient(0deg, transparent 0 23px, var(--stage-line) 23px 24px), repeating-linear-gradient(90deg, transparent 0 23px, var(--stage-line) 23px 24px); color: var(--stage-fg); display: grid; grid-template-rows: 1fr auto; overflow: hidden; position: relative; }
.stage .dim { opacity: .72; }
.board { aspect-ratio: 16 / 9; display: grid; place-content: center; gap: 12px; padding: 16px; text-align: center; }
.board .eg { font-weight: 600; font-size: clamp(18px, 1rem + 1.6vw, 32px); line-height: 1.25; }
.board .eg u { text-decoration: underline; text-decoration-thickness: 3px; text-underline-offset: 6px; color: var(--stage-fg); }
.ctrl { display: flex; gap: 12px; align-items: center; min-height: 44px; padding: 4px 12px; background: var(--stage); border-top: 1px solid var(--stage-line); flex-wrap: wrap; font-family: var(--f-mono); font-size: 13px; font-variant-numeric: tabular-nums; }
.ctrl button, .ctrl select { min-width: 32px; min-height: 32px; display: inline-grid; place-items: center; background: none; border: 1px solid color-mix(in srgb, var(--stage-fg) 42%, transparent); color: var(--stage-fg); border-radius: var(--r); padding: 4px 8px; }
.ctrl select option { color: var(--fg); background: var(--surface); }
.ctrl .seek { flex: 1 1 120px; height: 24px; display: grid; align-items: center; justify-items: stretch; cursor: pointer; background: none; border: 0; padding: 0; }
.seek span { display: block; height: 4px; background: color-mix(in srgb, var(--stage-fg) 30%, transparent); overflow: hidden; transition: height .12s ease; }
.seek:hover span, .seek:focus-visible span { height: 6px; }
.seek i { display: block; height: 100%; background: var(--stage-fg); }
.next { position: absolute; inset: 0; background: var(--stage); display: grid; place-content: center; gap: 12px; text-align: center; padding: 16px; }
.next .btn { background: var(--stage-fg); color: var(--stage); border-color: var(--stage-fg); }
.side { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.side h3 { padding: 12px 16px; display: flex; justify-content: space-between; gap: 12px; }
.side-pct { font-weight: 500; font-size: 14px; }
.side .sub { padding: 8px 16px; font-size: 13px; line-height: 18px; font-weight: 600; color: var(--muted); background: var(--surface-2); }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tabs button { background: none; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; padding: 8px 12px; font-weight: 500; color: var(--muted); white-space: nowrap; }
.tabs button[aria-selected="true"] { color: var(--fg); border-bottom-color: var(--ink); }
.chat { display: grid; gap: 12px; }
.msg { max-width: 640px; padding: 12px 16px; border-radius: var(--r); display: grid; gap: 8px; }
.msg.u { justify-self: end; background: var(--surface-2); color: var(--fg); }
.msg.a { justify-self: start; background: var(--surface); border: 1px solid var(--line); }
.cite { display: flex; gap: 4px 8px; flex-wrap: wrap; }
.composer { display: flex; gap: 8px; }
.composer input { flex: 1; min-width: 0; }
@media (max-width: 900px) { .player { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- soru: optik form seçenekleri */
.q { display: grid; gap: 16px; max-width: 720px; }
.q .stem { font-size: 20px; line-height: 30px; font-weight: 500; max-width: 65ch; }
.opts-list { display: grid; gap: 8px; }
.opt { display: flex; gap: 12px; align-items: center; width: 100%; min-height: 48px; text-align: left; padding: 8px 12px; border: 1px solid var(--line-strong); border-radius: var(--r); background: var(--surface); }
.opt:hover:not([disabled]) { background: var(--surface-2); }
.opt .bub { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--ink); display: grid; place-items: center; font-family: var(--f-mono); font-weight: 500; font-size: 13px; color: var(--ink); background: var(--surface); }
.opt[aria-checked="true"] { border-color: var(--pencil); box-shadow: inset 0 0 0 1px var(--pencil); }
.opt[aria-checked="true"] .bub { background: var(--pencil); border-color: var(--pencil); color: var(--paper); }
.opt.right { border-color: var(--ok); box-shadow: inset 0 0 0 1px var(--ok); background: var(--ok-soft); }
.opt.right .bub { background: var(--ok); border-color: var(--ok); color: var(--bg); }
.opt.wrong { border-color: var(--bad); box-shadow: none; }
.opt.wrong .bub { border-color: var(--bad); color: var(--fg); background: linear-gradient(to top right, transparent calc(50% - 1px), var(--bad) calc(50% - 1px) calc(50% + 1px), transparent calc(50% + 1px)), var(--surface); }
.opt .sonuc { margin-left: auto; flex: none; }
.opt[disabled] { cursor: default; }
.kbd-ipucu { font-size: 13px; color: var(--muted); }
.kbd-ipucu kbd { font-family: var(--f-mono); font-size: 12px; padding: 0 4px; border: 1px solid var(--line-strong); border-radius: var(--r-sm); }
@media (hover: none) { .kbd-ipucu { display: none; } }
.kilit { font-size: 13px; color: var(--muted); }
.note { padding: 12px 16px; border-radius: var(--r); background: var(--surface-2); display: grid; gap: 4px; }
.note.ipucu { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--ink); }
@media (max-width: 640px) { .q .stem { font-size: 18px; line-height: 28px; } }

/* ---------------------------------------------------------------- ustalık */
.mrow { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 340px) minmax(0, 1fr); gap: 12px 24px; align-items: center; padding: 16px 0; border-top: 1px solid var(--line); }
.mrow:first-of-type { border-top: 0; }
.mbars { display: grid; gap: 8px; }
.mbars > div { display: grid; grid-template-columns: 88px minmax(0, 196px) 44px; justify-content: start; gap: 12px; align-items: center; font-size: 13px; }
.mbars > div > span:last-child { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.mbars .bbs { display: grid; grid-template-columns: repeat(10, minmax(0, 16px)); gap: 4px; }
.mbars .bb { width: 100%; height: auto; aspect-ratio: 1; }
@media (max-width: 640px) { .mrow { grid-template-columns: minmax(0, 1fr); } }

/* ---------------------------------------------------------------- seviye tespiti */
.ladder { display: grid; grid-template-columns: repeat(6, 1fr); gap: 4px; }
.ladder span { text-align: center; padding: 8px 0; border-radius: var(--r); border: 1px solid var(--line-strong); font-family: var(--f-label); font-weight: 500; font-size: 13px; color: var(--muted); }
.ladder span.on { background: var(--pencil); border-color: var(--pencil); color: var(--paper); }

/* soru oturumu şeridi */
.qstrip { display: flex; flex-wrap: wrap; gap: 4px; }
.qstrip .bb { width: 28px; height: 28px; display: grid; place-items: center; font-family: var(--f-label); font-size: 12px; font-style: normal; color: var(--ink); }
.qstrip .bb.s { color: var(--paper); }
.qstrip .bb.x { border-color: var(--bad); color: var(--muted); background: linear-gradient(to top right, transparent calc(50% - 1px), var(--bad) calc(50% - 1px) calc(50% + 1px), transparent calc(50% + 1px)), var(--surface); }
.qstrip .bb.cur { outline: 2px solid var(--pencil); outline-offset: 2px; }

/* ---------------------------------------------------------------- öğretmen paneli */
.admin { display: grid; grid-template-columns: 208px minmax(0, 1fr); gap: 48px; align-items: start; }
.adm-nav { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 96px); min-width: 0; }
.adm-nav nav { display: grid; margin-top: 16px; border-left: 1px solid var(--line); }
.adm-nav nav button { background: none; border: 0; border-left: 2px solid transparent; margin-left: -1px; min-height: 40px; padding: 8px 16px; text-align: left; color: var(--muted); font-weight: 500; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.adm-nav nav button .num { font-family: var(--f-label); font-size: 12px; }
.adm-nav nav button[aria-current="true"] { color: var(--fg); border-left-color: var(--ink); font-weight: 600; }
.adm-main { display: grid; gap: 32px; min-width: 0; }
/* göstergeler: tek ızgara, etiket eş aralıklı 12, değer 28 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin: 0; border: 1px solid var(--line-strong); border-radius: var(--r); overflow: hidden; }
.stats div { padding: 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 0 -1px -1px 0; }
.stats dt { font-family: var(--f-label); font-size: 12px; line-height: 16px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink); }
.stats dd { margin: 4px 0 0; font-family: var(--f-display); font-size: 28px; line-height: 32px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stats small { font-family: var(--f-body); font-size: 13px; font-weight: 400; color: var(--muted); }
.tblwrap { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th { text-align: left; font-size: 13px; line-height: 16px; font-weight: 600; color: var(--muted); padding: 8px 12px 8px 0; border-bottom: 1px solid var(--line-strong); white-space: nowrap; }
.tbl td { height: 48px; padding: 8px 12px 8px 0; border-bottom: 1px solid var(--line); vertical-align: middle; }
.tbl tbody tr:hover td { background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.tbl .r { text-align: right; padding-right: 0; font-variant-numeric: tabular-nums; }
.tbl .bar { min-width: 140px; }
.li { padding: 16px 0; border-bottom: 1px solid var(--line); display: grid; gap: 8px; max-width: 760px; }
.li:first-child { border-top: 1px solid var(--line-strong); }
.li-meta { font-size: 13px; color: var(--muted); }
.li-meta b { color: var(--fg); }
.li textarea { width: 100%; min-height: 96px; padding: 12px; border: 1px solid var(--line-strong); border-radius: var(--r); background: var(--surface); }
.erow { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; padding: 12px 0; border-top: 1px solid var(--line); }
.erow:first-of-type { border-top: 0; }
.check-row input { flex: none; margin-top: 4px; width: 18px; height: 18px; accent-color: var(--ink); }
@media (max-width: 820px) {
  .admin { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .adm-nav { position: static; }
  .adm-nav nav { display: flex; border-left: 0; border-bottom: 1px solid var(--line); overflow-x: auto; }
  .adm-nav nav button { border-left: 0; border-bottom: 2px solid transparent; margin: 0 0 -1px; white-space: nowrap; }
  .adm-nav nav button[aria-current="true"] { border-bottom-color: var(--ink); }
  .tick { width: 28px; height: 28px; }
  .link { padding-block: 8px; }
}

/* formlar ve adımlar */
.form { max-width: 560px; }
.form textarea.field { resize: vertical; }
.steps { display: flex; flex-wrap: wrap; gap: 8px 24px; list-style: none; margin: 4px 0 0; padding: 0; color: var(--muted); font-size: 14px; }
.steps li { display: inline-flex; align-items: center; gap: 8px; }
.steps li::before { content: attr(data-n); width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-strong); font-family: var(--f-label); font-size: 12px; color: var(--ink); }
.steps li.bitti::before { content: "✓"; background: var(--surface-2); }
.steps li[aria-current="true"] { color: var(--fg); font-weight: 600; }
.steps li[aria-current="true"]::before { background: var(--pencil); border-color: var(--pencil); color: var(--paper); }
.opts { border: 0; padding: 0; margin: 0; display: grid; gap: 8px; }
.opts legend { font-weight: 500; font-size: 14px; padding: 0; margin-bottom: 4px; }
.opts input[type="radio"] { flex: none; width: 18px; height: 18px; accent-color: var(--ink); }

/* bildirim */
.toast { position: fixed; left: 50%; bottom: calc(76px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 40; background: var(--pencil); color: var(--paper); padding: 8px 16px; border-radius: var(--r); font-weight: 500; max-width: calc(100% - 32px); text-align: center; }

/* ---------------------------------------------------------------- karşılama: kitapçık sayfası
   (künye satırı, tırnaklı başlık, dipnotlu araştırma); sağda canlı cevap kâğıdı */
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; align-items: start; padding-block: 24px 16px; }
.hero-l { display: grid; gap: 24px; }
.kunye { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; padding-bottom: 8px; border-bottom: 1px solid var(--line-strong); font-family: var(--f-label); font-size: 12px; line-height: 16px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink); }
#app .hero h1 { font-size: clamp(36px, 4.8vw, 56px); line-height: 1.06; letter-spacing: -.01em; }
.lead { font-size: 18px; line-height: 28px; max-width: 34em; }
.arastirma { margin: 8px 0 0; display: grid; gap: 12px; max-width: 34em; }
.arastirma figcaption { font-size: 14px; line-height: 20px; color: var(--muted); }
.arastirma dl { margin: 0; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.arastirma dl > div { display: grid; gap: 4px; align-content: start; padding: 12px 16px 12px 0; }
.arastirma dl > div + div { padding-left: 16px; border-left: 1px solid var(--line); }
.arastirma dd { margin: 0; font-family: var(--f-display); font-size: 32px; line-height: 40px; font-weight: 700; font-variant-numeric: tabular-nums; }
.arastirma dl > div + div dd { color: var(--bad); }
.arastirma dt { font-size: 14px; line-height: 20px; color: var(--muted); }
.dipnot { font-size: 13px; line-height: 18px; color: var(--muted); }
sup { font-size: .7em; line-height: 0; }
.hero-r { display: grid; gap: 12px; min-width: 0; }
.sheet { position: relative; display: flex; gap: 16px; min-width: 0; }
/* optik formun zamanlama işaretleri */
.marks { display: grid; gap: 16px; align-content: start; padding-top: 8px; }
.marks i { display: block; width: 20px; height: 6px; background: var(--pencil); }
.demo { flex: 1 1 0; min-width: 0; border: 1px solid var(--ink); border-radius: var(--r); background: var(--surface); overflow: hidden; }
.demo-h { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; background: var(--surface-2); padding: 8px 16px; border-bottom: 1px solid var(--line); }
.demo-b { display: grid; gap: 16px; padding: 24px 16px; }
.demo .stem { display: flex; gap: 12px; align-items: baseline; font-size: 20px; line-height: 30px; font-weight: 500; }
.demo-opts { display: grid; gap: 8px; }
.demo-opts .opts-list { grid-template-columns: 1fr 1fr; }
.demo-opts.one .opts-list { grid-template-columns: 1fr; }
.demo-opts .opt:last-child:nth-child(odd) { grid-column: 1 / -1; }
/* dar iki sütunda sonuç çipi optik formdaki not gibi kutunun üst kenarına oturur */
.demo-opts .opt { position: relative; }
.demo-opts .opt .sonuc { position: absolute; top: -9px; right: 8px; margin: 0; }
.demo-m { border-top: 1px dashed var(--line-strong); padding-top: 16px; display: grid; gap: 12px; }
/* kitapçık bölümleri: üstte kalın çizgi, numaralı satırlar */
.bolum > h2 { padding-top: 12px; border-top: 2px solid var(--pencil); }
.how { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); counter-reset: how; }
.how li { display: grid; grid-template-columns: 40px 1fr; gap: 4px 0; align-content: start; padding: 16px 24px 16px 0; counter-increment: how; }
.how li + li { padding-left: 24px; border-left: 1px solid var(--line); }
.how li::before { content: counter(how) "."; grid-row: span 2; font-family: var(--f-display); font-size: 26px; line-height: 28px; font-weight: 600; color: var(--ink); }
.how li b { font-size: 18px; line-height: 28px; font-weight: 600; }
.plans { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.plan { padding: 24px 32px 24px 0; display: grid; gap: 12px; align-content: start; }
.plan + .plan { padding-left: 32px; border-left: 1px solid var(--line); }
.plan h3 { font-family: var(--f-display); font-size: 22px; line-height: 28px; }
.plan .price { font-family: var(--f-mono); font-size: 24px; line-height: 32px; font-weight: 600; }
.plan.plus .price { font-family: var(--f-body); font-size: 16px; line-height: 24px; font-weight: 500; color: var(--muted); }
.plan ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
/* madde imi: boş optik balon */
.plan li { display: flex; gap: 12px; align-items: baseline; }
.plan li::before { content: ""; flex: none; width: 10px; height: 10px; border-radius: 50%; border: 1px solid var(--ink); transform: translateY(1px); }
.plan-not { max-width: 44em; font-size: 14px; line-height: 20px; }
/* kenar notu: kutu yerine sol çizgi */
.kenar-notu { display: grid; gap: 8px; max-width: 44em; padding: 4px 0 4px 24px; border-left: 3px solid var(--ink); }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding-block: 16px 32px; }
  .marks { display: none; }
  .how { grid-template-columns: 1fr; }
  .how li, .how li + li { padding: 16px 0; border-left: 0; border-top: 1px solid var(--line); }
  .plans { grid-template-columns: 1fr; }
  .plan, .plan + .plan { padding: 24px 0; border-left: 0; }
  .plan + .plan { border-top: 1px solid var(--line); }
}
@media (max-width: 420px) { .demo-opts { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- hareket */
@media (prefers-reduced-motion: no-preference) {
  .prog > i, .seek i { transition: width .25s linear; }
  .card, .opt, .cover, .btn, button.chip { transition: background-color .12s ease, border-color .12s ease; }
}

/* Oturum sonucu: doğru / yanlış notları yalnız renge dayanmaz (başlıkta "Doğru"/"Yanlış" yazar). */
.note.dogru { border-left: 3px solid var(--ok); }
.note.yanlis { border-left: 3px solid var(--bad); }
.qstrip .bb.a { color: var(--ink); }
/* Dar ekranda yığılan tablo: her satır bir kart, hücre etiketi data-l'den. */
@media (max-width: 599px) {
  .tbl.yigin thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .tbl.yigin, .tbl.yigin tbody, .tbl.yigin tr, .tbl.yigin td { display: block; width: auto; }
  .tbl.yigin tr { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .tbl.yigin td { display: flex; justify-content: space-between; gap: 16px; padding: 4px 0; border: 0; text-align: right; height: auto; min-height: 0; }
  .tbl.yigin td::before { content: attr(data-l); color: var(--muted); text-align: left; }
  .tbl.yigin td[data-l="Konu"] { justify-content: flex-start; text-align: left; }
  .tbl.yigin td[data-l="Konu"]::before { content: none; }
}

/* Oynatıcı: bölüm çentikleri, altyazı, transkript (S3.1) */
.seek span { position: relative; }
.seek .cent { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--stage); }
.stage .cc { margin: 0; padding: 8px 16px; text-align: center; font-size: 15px; line-height: 22px; background: rgba(0, 0, 0, .55); }
.ccbtn[aria-pressed="true"] { background: var(--stage-fg) !important; color: var(--stage) !important; }
.board .eg s { text-decoration-thickness: 2px; opacity: .7; }
.stage.ses .board { aspect-ratio: auto; min-height: 220px; }
.trlist { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.trs { width: 100%; display: grid; grid-template-columns: 56px 1fr; gap: 12px; text-align: left; background: none; border: 0; border-left: 2px solid transparent; padding: 8px 12px; border-radius: 0; color: var(--fg); font: inherit; cursor: pointer; }
.trs:hover { background: var(--surface-2); }
.trs[aria-current="true"] { border-left-color: var(--ink); background: var(--surface-2); }
.trs > span:last-child { display: grid; gap: 2px; }
.trs .num { color: var(--ink); font-family: var(--f-mono); font-size: 13px; padding-top: 2px; }
.trs .en { font-style: italic; }
.side .ttl { display: inline-flex; gap: 8px; align-items: flex-start; text-align: left; }
.side .ttl svg { flex: none; margin-top: 4px; color: var(--muted); }
span.tick { display: inline-grid; place-items: center; }

/* Sıradaki adım kartı (E1) */
.siradaki { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; padding: 16px 24px; border: 1px solid var(--line-strong); border-left: 3px solid var(--ink); border-radius: var(--r); background: var(--surface); }
.siradaki .sir-et { margin: 4px 0 0; font-size: 18px; line-height: 24px; font-weight: 600; }
.ozet .tbl td { vertical-align: top; }
@media print {
  .notice, .top, .tabbar, .side, .tabs, .tabs ~ *, .ozet .btn, .sec { display: none !important; }
  .player { display: block !important; }
}

/* Öğretmen paneli (S4) */
.tbl .hl-row td { background: var(--hl-band); }
.stats small { display: block; margin-top: 4px; font-size: 13px; color: var(--muted); }
.field.mono, code { font-family: var(--f-mono); font-size: 13px; }
code { background: var(--surface-2); padding: 0 4px; border-radius: var(--r-sm); }
.tbl td.r + td, .tbl th.r + th { padding-left: 16px; }
@media (max-width: 599px) { .tbl.yigin td.r + td, .tbl.yigin th.r + th { padding-left: 0; } .tbl.yigin td[data-l="Soru"] { display: block; text-align: left; } .tbl.yigin td[data-l="Soru"]::before { content: none; } }

/* Esnek haftalık hedef ve takvim (E6): seri sayacı yok, kaçırılan gün kırmızıyla gösterilmez. */
.hedef { display: grid; gap: 12px; margin-top: 24px; }
.hafta { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }
.hafta > span { display: grid; justify-items: center; gap: 4px; font-size: 13px; color: var(--muted); }
.hafta i { width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--line-strong); background: var(--surface); }
.hafta .on i { background: var(--pencil); border-color: var(--pencil); }
.hafta .bugun { color: var(--fg); font-weight: 600; }
.hafta .bugun i { outline: 2px solid var(--ink); outline-offset: 2px; }
.takvim-d summary { cursor: pointer; font-size: 14px; color: var(--muted); }
.takvim { display: grid; grid-template-columns: repeat(7, 16px); grid-auto-rows: 16px; gap: 4px; margin-top: 8px; }
.takvim i { border-radius: 2px; background: var(--surface-2); border: 1px solid var(--line); }
.takvim .t1 { background: color-mix(in srgb, var(--ink) 30%, var(--surface)); }
.takvim .t2 { background: color-mix(in srgb, var(--ink) 60%, var(--surface)); }
.takvim .t3 { background: var(--ink); }
.takvim .gelecek { opacity: .35; }
.ses-uyari { margin: 8px 0 0; }