:root {
  --vurgu: #ef6c2f;
  --zemin: #fff8f2;
  --kart: #ffffff;
  --yazi: #2b2420;
  --soluk: #7a6d64;
  --cizgi: #f0e2d6;
  --dogru: #2e9d5b;
  --yanlis: #d64545;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--zemin); color: var(--yazi);
  font: 17px/1.5 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
.ust { background: var(--vurgu); color: #fff; padding: 14px 16px; }
.logo { font-size: 20px; letter-spacing: .2px; }
.yol { max-width: 760px; margin: 0 auto; padding: 12px 16px 0; font-size: 14px; color: var(--soluk); }
.yol a { color: var(--vurgu); }
.yol span { margin: 0 6px; }
.icerik { max-width: 760px; margin: 0 auto; padding: 12px 16px 40px; }
h1 { font-size: 24px; margin: 6px 0 14px; line-height: 1.25; }
h2 { font-size: 18px; margin: 22px 0 10px; }
.aciklama { color: var(--soluk); margin: -6px 0 16px; }

.liste { display: grid; gap: 10px; }

/* Ana sayfa: sınıf seçimi ve kapak ızgarası */
.sinif-sec { display: flex; gap: 8px; overflow-x: auto; padding: 2px 0 12px; margin-bottom: 6px; scrollbar-width: none; }
.sinif-sec::-webkit-scrollbar { display: none; }
.sinif-sec a {
  flex: none; padding: 9px 16px; border-radius: 999px; background: var(--kart); border: 2px solid var(--cizgi);
  font-weight: 600; font-size: 15px; white-space: nowrap;
}
.sinif-sec a.secili { background: var(--vurgu); border-color: var(--vurgu); color: #fff; }
.kapaklar { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 18px 14px; }
.kapak { position: relative; display: flex; flex-direction: column; gap: 4px; }
.kapak img {
  width: 100%; aspect-ratio: 5 / 7; object-fit: cover; border-radius: 10px; background: var(--cizgi);
  box-shadow: 0 4px 14px rgba(60, 30, 10, .18); transition: transform .12s, box-shadow .12s;
}
a.kapak:hover img { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(60, 30, 10, .25); }
.kapak.pasif img { filter: grayscale(.55); opacity: .7; }
.kapak-ad { font-weight: 700; font-size: 15px; line-height: 1.25; margin-top: 4px; }
.kapak-alt { font-size: 13px; color: var(--soluk); }
.yakinda {
  position: absolute; top: 10px; left: 0; right: 0; margin: 0 auto; width: max-content;
  background: rgba(31, 27, 46, .85); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px;
}
@media (max-width: 380px) { .kapaklar { grid-template-columns: 1fr 1fr; gap: 14px 10px; } }
@media (min-width: 640px) { .sinif-sec { flex-wrap: wrap; overflow: visible; } }
.satir {
  display: flex; align-items: center; gap: 14px; background: var(--kart);
  border: 1px solid var(--cizgi); border-radius: 14px; padding: 14px 16px;
  transition: transform .08s, box-shadow .08s;
}
.satir:hover { box-shadow: 0 3px 12px rgba(120, 60, 20, .12); transform: translateY(-1px); }
.rozet {
  flex: none; min-width: 44px; height: 44px; padding: 0 8px; border-radius: 11px; background: var(--vurgu); color: #fff;
  display: grid; place-items: center; font-weight: 700; font-size: 18px;
}
.satir .ad { font-weight: 600; }
.satir .bilgi { font-size: 14px; color: var(--soluk); }

.sorular { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 10px; }
.sorular a {
  background: var(--kart); border: 2px solid var(--cizgi); border-radius: 14px; height: 64px;
  display: grid; place-items: center; font-size: 22px; font-weight: 700; color: var(--vurgu);
}
.sorular a:hover { border-color: var(--vurgu); }

.soru-kart { max-width: 600px; background: var(--kart); border: 1px solid var(--cizgi); border-radius: 16px; padding: 12px; }
.kirp { position: relative; overflow: hidden; width: 100%; border-radius: 8px; background: #fff; }
.kirp img { position: absolute; left: 0; top: 0; max-width: none; display: block; }
.sayfa-ac { display: inline-block; margin-top: 8px; font-size: 14px; color: var(--vurgu); background: none; border: 0; padding: 4px 0; cursor: pointer; font-family: inherit; }
.tam-sayfa img { width: 100%; display: block; border-radius: 8px; margin-top: 8px; border: 1px solid var(--cizgi); }

.secim { display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0 6px; align-items: center; }
.secim .etiket { font-weight: 600; margin-right: 4px; }
.sik {
  width: 52px; height: 52px; border-radius: 50%; border: 2px solid var(--vurgu); background: #fff; color: var(--vurgu);
  font-size: 20px; font-weight: 700; cursor: pointer; font-family: inherit;
}
.sik:disabled { cursor: default; opacity: .55; }
.sik.dogru { background: var(--dogru); border-color: var(--dogru); color: #fff; opacity: 1; }
.sik.yanlis { background: var(--yanlis); border-color: var(--yanlis); color: #fff; opacity: 1; }
.mesaj { min-height: 26px; font-weight: 600; margin: 4px 0 8px; }
.mesaj.dogru { color: var(--dogru); }
.mesaj.yanlis { color: var(--yanlis); }

.dugme {
  display: inline-block; background: var(--vurgu); color: #fff; border: 0; border-radius: 12px;
  padding: 12px 20px; font-size: 17px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.dugme.ikincil { background: #fff; color: var(--vurgu); border: 2px solid var(--vurgu); }
.dugmeler { display: flex; gap: 10px; flex-wrap: wrap; }
.video-dugme { background: #c0392b; }
.video { position: relative; width: 100%; max-width: 600px; aspect-ratio: 16 / 9; margin-top: 14px; border-radius: 12px; overflow: hidden; background: #000; }
.video iframe, .video video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
/* Video çözüm: tam ekran katman, kaydırmasız tek ekran */
html.video-acik, html.video-acik body { overflow: hidden; }
.tam-ekran {
  position: fixed; inset: 0; z-index: 100; background: #1f1b2e; color: #fff;
  display: flex; flex-direction: column; height: 100vh; height: 100dvh;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.te-ust { flex: none; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 8px 12px; font-size: 15px; }
.te-baslik { font-weight: 600; opacity: .9; }
.te-kapat { flex: none; width: 42px; height: 42px; border-radius: 50%; border: 0; background: rgba(255,255,255,.14); color: #fff; font-size: 20px; cursor: pointer; }
.te-govde {
  flex: 1; min-height: 0; display: flex; flex-direction: column; gap: 10px;
  width: 100%; max-width: 980px; margin: 0 auto; padding: 0 12px 12px;
}
.sahne {
  flex: 1; min-height: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; overflow: hidden;
}
.sahne .kirp { flex: none; width: 100%; border-radius: 8px; background: #fff; }
.sahne .video { margin: 0; max-width: 100%; max-height: 100%; }
.te-panel { flex: none; display: flex; flex-direction: column; gap: 10px; }
.altyazi {
  margin: 0; min-height: 2.9em; padding: 10px 14px; border-radius: 10px; background: rgba(255,255,255,.08);
  font-size: clamp(16px, 1.6vh + 8px, 26px); line-height: 1.4; animation: belir .35s ease;
}
.kesir { display: inline-flex; flex-direction: column; align-items: center; vertical-align: middle; line-height: 1.05; font-size: .85em; margin: 0 2px; }
.kesir > span:first-child { border-bottom: 2px solid currentColor; padding: 0 3px; }
.adim-say { font-size: 13px; opacity: .7; min-width: 34px; text-align: right; }
/* Yatay telefon: görsel solda, altyazı ve düğmeler sağda */
@media (orientation: landscape) and (max-height: 560px) {
  .te-ust { padding: 4px 12px; }
  .te-govde { flex-direction: row; align-items: stretch; }
  .te-panel { width: 40%; justify-content: center; }
  .altyazi { font-size: 17px; }
}
/* Tablet ve geniş ekran: biraz daha büyük yazı */
@media (min-width: 768px) and (min-height: 700px) {
  .altyazi { font-size: 24px; padding: 14px 18px; }
  .kontrol .dugme { font-size: 17px; padding: 11px 18px; }
}
.altyazi.sonuc { background: var(--dogru); font-weight: 700; }
.altyazi b { color: #ffd166; }
.altyazi.sonuc b { color: #fff; }
@keyframes belir { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.adimlar { margin: 0 0 10px; padding-left: 22px; font-size: 14px; color: rgba(255,255,255,.35); }
.adimlar li { margin: 3px 0; transition: color .3s; display: none; }
.adimlar li.simdi, .adimlar li.gecti { display: list-item; }
.adimlar li.simdi { color: #fff; font-weight: 600; }
.adimlar li.gecti { color: rgba(255,255,255,.75); }
.adimlar b { color: inherit; }
.kontrol { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.kontrol .dugme { padding: 9px 14px; font-size: 15px; }
.kontrol .dugme.ikincil { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.ilerleme { flex: 1; min-width: 80px; height: 6px; background: rgba(255,255,255,.15); border-radius: 3px; overflow: hidden; }
.ilerleme span { display: block; height: 100%; width: 0; background: var(--vurgu); transition: width .4s; }
.katman { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.an-vurgu { fill: rgba(255, 214, 0, .28); stroke: #f4a100; stroke-width: 4; animation: an-belir .4s ease; }
.an-ort { fill: #fff; }
.an-yazi {
  fill: #e0262b; font: 700 46px "Segoe Print", "Comic Sans MS", "Chalkboard SE", cursive;
  text-anchor: middle; dominant-baseline: central;
}
.an-yaz { animation: an-yaz .45s cubic-bezier(.2, 1.6, .5, 1); transform-box: fill-box; transform-origin: center; }
.an-daire, .an-cizgi { fill: none; stroke: #e0262b; stroke-width: 5; stroke-linecap: round; animation: an-ciz .7s ease forwards; }
@keyframes an-belir { from { opacity: 0; } to { opacity: 1; } }
@keyframes an-yaz { from { opacity: 0; transform: scale(.3); } to { opacity: 1; transform: none; } }
@keyframes an-ciz { to { stroke-dashoffset: 0; } }
.ses-not { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 8px; }
.ses-not:empty { display: none; }
.ortak-baslik { font-size: 14px; font-weight: 600; color: var(--vurgu); margin: 2px 4px 6px; }
.ayrac { height: 1px; background: var(--cizgi); margin: 10px 0; }
.cozum { background: var(--kart); border: 1px solid var(--cizgi); border-left: 5px solid var(--vurgu); border-radius: 12px; padding: 14px 16px; margin-top: 14px; }
.cozum h3 { margin: 0 0 8px; font-size: 17px; }
.cozum ol { margin: 0; padding-left: 22px; }
.cozum li { margin: 6px 0; }
.cozum li.gizli { display: none; }
.cozum .sonuc { margin-top: 10px; font-weight: 700; color: var(--dogru); }
.cozum .adim-dugme { margin-top: 10px; }

.gezinti { display: flex; justify-content: space-between; gap: 10px; margin-top: 22px; }
.gezinti a { flex: 1; text-align: center; }
.gezinti .bos { flex: 1; }
.hata { background: #fff; border: 1px solid var(--cizgi); border-radius: 12px; padding: 16px; }
.alt { text-align: center; color: var(--soluk); font-size: 13px; padding: 20px 16px 30px; }

@media (max-width: 480px) {
  h1 { font-size: 21px; }
  .sik { width: 48px; height: 48px; }
  .soru-kart { padding: 6px; }
}