/* AIHEAR Odyoloji Akademisi: site stili (Tarz 1, Beyaz Mavi). Önce mobil. */
@font-face{font-family:'Outfit';src:url('../fontlar/Outfit.woff') format('woff');font-weight:400 800;font-style:normal;font-display:swap}
@font-face{font-family:'Inter';src:url('../fontlar/Inter.woff') format('woff');font-weight:400 700;font-style:normal;font-display:swap}

:root {
  --zemin: #FFFFFF;
  --zemin2: #EEF5FD;
  --kart: #F6F9FD;
  --cizgi: #DCE6F2;
  --mavi: #1E8FEA;
  --mavi-koyu: #0A6CC2;   /* küçük yazı ve düğmeler için erişilebilir koyu mavi */
  --lacivert: #0E2240;
  --sari: #FFB020;
  --soluk: #5D7190;
  --golge: 0 1px 2px rgba(14, 34, 64, .05), 0 6px 20px rgba(14, 34, 64, .06);
  --golge-ust: 0 2px 4px rgba(14, 34, 64, .06), 0 14px 34px rgba(14, 34, 64, .10);
  --yaricap: 16px;
  --baslik: 'Outfit', 'Segoe UI', system-ui, sans-serif;
  --govde: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body {
  margin: 0; background: var(--zemin); color: var(--lacivert);
  font-family: var(--govde); font-size: 16px; line-height: 1.6; font-weight: 400;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img, video, svg { max-width: 100%; display: block; }
a { color: var(--mavi-koyu); text-underline-offset: 3px; }
a:hover { color: var(--lacivert); }
h1, h2, h3, h4 { font-family: var(--baslik); font-weight: 700; line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--mavi); outline-offset: 2px; border-radius: 6px; }
[hidden] { display: none !important; }
.gizli { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.kap { width: 100%; max-width: 1240px; margin-left: auto; margin-right: auto; padding-left: 18px; padding-right: 18px; }
.kap.dar { max-width: 780px; }
main:focus { outline: none; }

.atla { position: absolute; left: 12px; top: -60px; background: var(--lacivert); color: #fff; padding: 10px 16px; border-radius: 10px; z-index: 100; font-weight: 600; }
.atla:focus { top: 10px; color: #fff; }

/* --- Üst bilgi --- */
.ust { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .92); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--cizgi); }
.ust-ic { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 64px; }
.logo img { height: 44px; width: auto; }
.menu { display: flex; align-items: center; gap: 4px; }
.menu a { text-decoration: none; color: var(--lacivert); font-weight: 600; font-size: 15px; padding: 8px 10px; border-radius: 10px; }
.menu a:hover { background: var(--zemin2); }
.menu a[aria-current="page"] { color: var(--mavi-koyu); }
.menu .dil-sec { border: 1.5px solid var(--cizgi); font-family: var(--baslik); letter-spacing: .06em; font-size: 13px; padding: 6px 10px; margin-left: 4px; }
.menu .dil-sec:hover { border-color: var(--mavi); background: #fff; }
body.ana .ust .logo { visibility: hidden; }
body.ana.kaydi .ust .logo { visibility: visible; }

/* --- Dalga zemin --- */
.dalga-zemin { position: absolute; left: 0; right: 0; bottom: 0; height: 200px; background: url('../img/dalga.svg') center bottom / 100% 100% no-repeat; pointer-events: none; }

/* --- Kahraman --- */
.kahraman { position: relative; overflow: hidden; background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFE 45%, var(--zemin2) 100%); border-bottom: 1px solid var(--cizgi); }
.kahraman-ic { position: relative; padding-top: 28px; padding-bottom: 52px; text-align: center; }
.kahraman-logo { margin: 0 auto 14px; }
.kahraman-logo img { width: min(300px, 78vw); height: auto; margin: 0 auto; }
.slogan { font-family: var(--baslik); font-weight: 700; font-size: clamp(30px, 6.4vw, 54px); line-height: 1.12; margin: 0 0 14px; letter-spacing: -.02em; }
.vurgu { color: var(--mavi); background: linear-gradient(transparent 60%, rgba(255, 176, 32, .42) 60%, rgba(255, 176, 32, .42) 90%, transparent 90%); padding: 0 .08em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.tanitim { color: var(--soluk); font-size: 17px; max-width: 640px; margin: 0 auto 26px; }

.arama { position: relative; display: flex; align-items: center; max-width: 760px; margin: 0 auto; background: #fff; border: 1.5px solid var(--cizgi); border-radius: 999px; box-shadow: var(--golge-ust); padding: 6px; transition: border-color .15s, box-shadow .15s; }
.arama:focus-within { border-color: var(--mavi); box-shadow: 0 0 0 4px rgba(30, 143, 234, .16), var(--golge-ust); }
.arama-ikon { width: 22px; height: 22px; margin: 0 4px 0 14px; flex: none; background: no-repeat center / contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235D7190' stroke-width='2.2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E"); }
.arama input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; font-size: 16px; padding: 12px 8px; }
.arama input::placeholder { color: #7D8EA8; }
.arama input::-webkit-search-cancel-button { cursor: pointer; }
.arama input:focus-visible { outline: none; }
.dugme { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--mavi-koyu); color: #fff; border: 0; border-radius: 999px; padding: 12px 22px; font-family: var(--baslik); font-weight: 600; font-size: 16px; text-decoration: none; cursor: pointer; transition: background .15s, transform .15s; }
.dugme:hover { background: var(--lacivert); color: #fff; }
.dugme.ikincil { background: #fff; color: var(--lacivert); border: 1.5px solid var(--cizgi); }
.dugme.ikincil:hover { border-color: var(--mavi); }
.arama .dugme { padding: 12px 18px; }

.sayilar { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 10px; padding: 0; margin: 22px 0 0; font-size: 14px; color: var(--soluk); }
.sayilar li { background: rgba(255, 255, 255, .85); border: 1px solid var(--cizgi); border-radius: 999px; padding: 5px 12px; }
.sayilar b { font-family: var(--baslik); color: var(--lacivert); font-size: 15px; margin-right: 2px; }

/* --- Filtreler --- */
.filtreler { position: relative; z-index: 40; background: rgba(255, 255, 255, .95); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--cizgi); }
.filtre-ic { display: flex; flex-direction: column; gap: 10px; padding-top: 12px; padding-bottom: 12px; }
.cipler { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; padding: 2px; }
.cipler::-webkit-scrollbar { display: none; }
.cip { flex: none; border: 1.5px solid var(--cizgi); background: #fff; border-radius: 999px; padding: 7px 16px; font-weight: 600; font-size: 14px; cursor: pointer; white-space: nowrap; transition: all .15s; }
.cip:hover { border-color: var(--mavi); }
.cip[aria-pressed="true"] { background: var(--lacivert); border-color: var(--lacivert); color: #fff; }
.secimler { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.secim { display: flex; flex-direction: column; flex: 1 1 140px; min-width: 0; font-size: 12px; color: var(--soluk); font-weight: 600; }
.secim select { margin-top: 2px; width: 100%; border: 1.5px solid var(--cizgi); border-radius: 10px; background: #fff; padding: 8px 32px 8px 10px; font-size: 14px; color: var(--lacivert); font-weight: 500; appearance: none; -webkit-appearance: none; background: #fff no-repeat right 10px center / 14px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235D7190' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); text-overflow: ellipsis; }
.secim select:hover { border-color: var(--mavi); }
.anahtar-sec { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; cursor: pointer; user-select: none; }
.anahtar-sec input { appearance: none; -webkit-appearance: none; width: 38px; height: 22px; border-radius: 999px; background: var(--cizgi); position: relative; cursor: pointer; transition: background .15s; margin: 0; flex: none; }
.anahtar-sec input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, .2); transition: transform .15s; }
.anahtar-sec input:checked { background: var(--mavi-koyu); }
.anahtar-sec input:checked::after { transform: translateX(16px); }
.anahtar-sec.kucuk { font-size: 13px; color: var(--soluk); }
.metin-dugme { background: none; border: 0; color: var(--mavi-koyu); font-weight: 600; font-size: 14px; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; padding: 6px 2px; }

/* --- Bölümler, kartlar --- */
.bolum { padding: 30px 0 8px; }
.bolum > h2 { font-size: 26px; }
.bolum-aciklama { color: var(--soluk); max-width: 760px; }
.bos { background: var(--kart); border: 1px dashed var(--cizgi); border-radius: var(--yaricap); padding: 18px; color: var(--soluk); text-align: center; }
.sinif-grup { margin-top: 26px; }
.sinif-bas { font-size: 22px; display: inline-flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.sinif-bas::before { content: ""; width: 10px; height: 26px; border-radius: 4px; background: var(--mavi); }
.ders-grup { padding: 14px 0 6px; border-top: 1px solid var(--cizgi); margin-top: 10px; }
.grup-bas { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 14px; margin-bottom: 12px; }
.grup-bas h4 { font-size: 18px; margin: 0; }
.grup-bilgi { display: flex; gap: 12px; margin: 0; font-size: 13px; color: var(--soluk); }
.donem { font-weight: 600; }

.izgara { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: 14px; align-items: start; }
.kart { background: #fff; border: 1px solid var(--cizgi); border-radius: var(--yaricap); box-shadow: var(--golge); overflow: hidden; transition: transform .15s, box-shadow .15s, border-color .15s; scroll-margin-top: 140px; }
.kart:hover { transform: translateY(-2px); box-shadow: var(--golge-ust); border-color: #C6D7EC; }
.kart:target { outline: 3px solid var(--sari); outline-offset: 2px; }
.kart-bag { display: flex; flex-direction: column; height: 100%; color: inherit; text-decoration: none; }
.kart-bag:focus-visible { outline-offset: -3px; border-radius: var(--yaricap); }
.kart-gorsel { position: relative; display: block; aspect-ratio: 16 / 9; background: var(--zemin2); }
.kart-gorsel img { width: 100%; height: 100%; object-fit: cover; }
.kart-sure { position: absolute; right: 8px; bottom: 8px; background: rgba(14, 34, 64, .88); color: #fff; font-size: 12px; font-weight: 600; padding: 2px 7px; border-radius: 6px; font-variant-numeric: tabular-nums; }
.kart-govde { display: flex; flex-direction: column; gap: 6px; padding: 12px 14px 14px; flex: 1; }
.kod { display: inline-flex; align-items: center; gap: 8px; font-family: var(--baslik); font-weight: 700; font-size: 11px; letter-spacing: .12em; color: var(--mavi-koyu); }
.kart-baslik { font-family: var(--baslik); font-weight: 600; font-size: 17px; line-height: 1.28; color: var(--lacivert); }
.kart-meta { display: flex; flex-wrap: wrap; gap: 4px 10px; margin-top: auto; font-size: 13px; color: var(--soluk); }
.kart-meta span + span::before { content: ""; display: inline-block; width: 4px; height: 4px; border-radius: 50%; background: #A9B7CA; margin-right: 10px; vertical-align: middle; }
.kart-meta span:empty { display: none; }
.kart.plan { background: var(--kart); border-style: dashed; box-shadow: none; }
.kart.plan:hover { transform: none; box-shadow: none; border-color: var(--cizgi); }
.kart.plan .kod { color: var(--soluk); }
.kart.plan .kart-baslik { font-weight: 500; font-size: 15.5px; color: #33465F; }
.yakinda { display: inline-block; font-family: var(--govde); letter-spacing: .02em; font-size: 11px; font-weight: 700; color: #7A4B00; background: #FFF1D6; border: 1px solid #FFD58A; border-radius: 999px; padding: 1px 8px; }
.yeni-bolum .izgara { grid-template-columns: repeat(auto-fill, minmax(min(100%, 270px), 1fr)); }

/* --- Arama sonuçları --- */
.sonuclar { padding: 22px 0 10px; }
.sonuc-ust { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; margin-bottom: 8px; }
.sonuc-ust h2 { font-size: 22px; margin: 0; }
.katmanlar { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 4px; padding: 0; list-style: none; }
.katmanlar a { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--lacivert); border: 1.5px solid var(--cizgi); border-radius: 999px; padding: 5px 6px 5px 14px; font-size: 14px; font-weight: 600; background: #fff; }
.katmanlar a:hover { border-color: var(--mavi); }
.katmanlar a.sifir { color: var(--soluk); font-weight: 500; }
.sayac { display: inline-grid; place-items: center; min-width: 26px; height: 22px; padding: 0 7px; border-radius: 999px; background: var(--zemin2); color: var(--mavi-koyu); font-size: 12px; font-weight: 700; }
.katman { margin-top: 22px; scroll-margin-top: 150px; }
.katman h3 { display: flex; align-items: center; gap: 10px; font-size: 18px; padding-bottom: 8px; border-bottom: 2px solid var(--zemin2); }
.katman-no { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 8px; background: var(--mavi-koyu); color: #fff; font-size: 14px; }
.sonuc-liste { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.sonuc { display: grid; grid-template-columns: 112px 1fr; gap: 14px; background: #fff; border: 1px solid var(--cizgi); border-radius: var(--yaricap); padding: 12px; box-shadow: var(--golge); }
.sonuc.plan { background: var(--kart); border-style: dashed; box-shadow: none; }
.sonuc-gorsel { display: block; aspect-ratio: 16 / 9; border-radius: 10px; overflow: hidden; background: var(--zemin2); }
.sonuc-gorsel img { width: 100%; height: 100%; object-fit: cover; }
.sonuc-gorsel.plan-gorsel { display: grid; place-items: center; font-family: var(--baslik); font-weight: 700; font-size: 12px; letter-spacing: .1em; color: var(--soluk); background: repeating-linear-gradient(135deg, #F0F5FC 0 8px, #E8F0FA 8px 16px); }
.sonuc-icerik { min-width: 0; }
.sonuc-baslik { font-family: var(--baslik); font-weight: 600; font-size: 18px; line-height: 1.3; margin: 2px 0 4px; }
.sonuc-baslik a { color: var(--lacivert); text-decoration: none; }
.sonuc-baslik a:hover { color: var(--mavi-koyu); text-decoration: underline; }
.sonuc-meta { font-size: 13px; color: var(--soluk); margin: 0 0 6px; }
@media (max-width: 639px) { .sonuc-meta span:nth-child(3) { display: none; } .sonuc-meta span:nth-child(4)::before { display: inline-block; } }
mark { background: rgba(255, 176, 32, .38); color: inherit; border-radius: 3px; padding: 0 1px; box-shadow: 0 0 0 1px rgba(255, 176, 32, .25); }
.eslesen-anahtar { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 6px 0 0; }
.eslesen-anahtar li { font-size: 13px; background: var(--zemin2); border-radius: 999px; padding: 2px 10px; }
.parcalar { list-style: none; margin: 6px 0 0; padding: 0; display: grid; gap: 4px; }
.parcalar a { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: baseline; color: var(--lacivert); text-decoration: none; font-size: 14.5px; padding: 6px 8px; border-radius: 10px; }
.parcalar a:hover { background: var(--zemin2); }
.parcalar .zaman-et { font-family: var(--baslik); font-weight: 700; font-size: 12.5px; color: #fff; background: var(--mavi-koyu); border-radius: 6px; padding: 1px 7px; font-variant-numeric: tabular-nums; }
.parcalar .parca-metin { color: #2A3D57; }
.daha { font-size: 13px; color: var(--soluk); margin: 4px 8px 0; }
.yukleniyor { color: var(--soluk); font-size: 14px; }

/* --- Ders sayfası --- */
.ders-sayfa { padding-top: 14px; padding-bottom: 30px; }
.kirinti ol { display: flex; flex-wrap: wrap; gap: 4px; list-style: none; margin: 0 0 14px; padding: 0; font-size: 13.5px; }
.kirinti li + li::before { content: "›"; color: var(--soluk); margin: 0 6px 0 2px; }
.kirinti a { color: var(--soluk); text-decoration: none; }
.kirinti a:hover { color: var(--mavi-koyu); text-decoration: underline; }
.ders-izgara { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-areas: "oyn" "yan" "bilgi"; gap: 16px 26px; }
.ders-oyn { grid-area: oyn; min-width: 0; }
.ders-yan { grid-area: yan; min-width: 0; }
.ders-bilgi { grid-area: bilgi; min-width: 0; }
.metin-kapali .ders-yan { display: none; }

/* oynatıcı altındaki düğmeler */
.oyn-arac { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; margin-top: 10px; }
.arac-dugme { display: inline-flex; align-items: center; gap: 8px; border: 1.5px solid var(--cizgi); background: #fff; color: var(--lacivert); border-radius: 999px; padding: 7px 14px 7px 10px; font-family: var(--baslik); font-weight: 600; font-size: 14px; cursor: pointer; transition: border-color .15s, background .15s, color .15s; }
.arac-dugme:hover { border-color: var(--mavi); }
.arac-dugme[aria-pressed="true"], .arac-dugme[aria-expanded="true"] { background: var(--lacivert); border-color: var(--lacivert); color: #fff; }
.cc-ikon { display: inline-grid; place-items: center; min-width: 28px; height: 20px; border: 1.8px solid currentColor; border-radius: 5px; font-size: 10.5px; font-weight: 800; letter-spacing: .04em; line-height: 1; }
.metin-ikon { width: 18px; height: 14px; background: linear-gradient(currentColor, currentColor) 0 0 / 100% 2px no-repeat, linear-gradient(currentColor, currentColor) 0 6px / 100% 2px no-repeat, linear-gradient(currentColor, currentColor) 0 12px / 65% 2px no-repeat; }

/* altyazılar: marka yazı tipi, alt ortada, yarı saydam lacivert zemin */
#video::cue { font-family: 'Outfit', 'Segoe UI', system-ui, sans-serif; font-weight: 600; color: #fff; background-color: rgba(14, 34, 64, .78); line-height: 1.35; }
#video::-webkit-media-text-track-display { padding: 2px 6px; }
.oynatici { position: relative; aspect-ratio: 16 / 9; background: #0B1A30; border-radius: var(--yaricap); overflow: hidden; box-shadow: var(--golge-ust); }
.oynatici video, .oynatici iframe, .oynatici #yt-oyn { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.yt-kapak { position: absolute; inset: 0; padding: 0; border: 0; background: #0B1A30; cursor: pointer; z-index: 2; }
.yt-kapak img { width: 100%; height: 100%; object-fit: cover; }
.oynat-ikon { position: absolute; left: 50%; top: 50%; width: 76px; height: 76px; margin: -38px 0 0 -38px; border-radius: 50%; background: rgba(14, 34, 64, .86); box-shadow: 0 8px 24px rgba(0, 0, 0, .25); transition: transform .15s, background .15s; }
.oynat-ikon::after { content: ""; position: absolute; left: 31px; top: 24px; border-style: solid; border-width: 14px 0 14px 22px; border-color: transparent transparent transparent #fff; }
.yt-kapak:hover .oynat-ikon { transform: scale(1.06); background: var(--mavi-koyu); }

/* YouTube oynatıcısı kendi oynatıcımız gibi: iframe kutunun üç katı yükseklikte ortalanır, YouTube arayüzü (başlık, gölge, logo)
   görünür alanın dışında kalır (video genişliğe oturduğu için kesilmez); fare yalnız perdeyi görür; denetimler ve altyazı bizim */
.oynatici.yt #yt-oyn { top: -100%; bottom: auto; height: 300%; }
.oynatici.ozel .yt-kapak { z-index: 6; transition: opacity .45s; }
.yt-kapak.gidiyor { opacity: 0; pointer-events: none; }
.yt-kapak.bekliyor { cursor: progress; }
.yt-kapak.bekliyor .oynat-ikon::after { left: 50%; top: 50%; width: 30px; height: 30px; margin: -15px 0 0 -15px; border: 3px solid rgba(255, 255, 255, .35); border-top-color: #fff; border-radius: 50%; animation: donus .8s linear infinite; }
@keyframes donus { to { transform: rotate(360deg); } }
.yt-perde { position: absolute; inset: 0; z-index: 1; cursor: pointer; outline: none; }
.oynatici.oynuyor:not(.arac-acik) .yt-perde { cursor: none; }
.yt-altyazi { position: absolute; left: 5%; right: 5%; bottom: 6%; z-index: 2; text-align: center; pointer-events: none; transition: bottom .2s; }
.yt-altyazi span { font-family: var(--baslik); font-weight: 600; font-size: clamp(14px, 2.4vw, 24px); line-height: 1.55; color: #fff; background: rgba(14, 34, 64, .78); padding: 2px 8px; border-radius: 4px; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.oynatici.arac-acik .yt-altyazi, .oynatici.durdu .yt-altyazi { bottom: calc(6% + 66px); }
.orta-oynat { position: absolute; left: 50%; top: 50%; width: 76px; height: 76px; margin: -38px 0 0 -38px; padding: 0; border: 0; background: none; z-index: 3; cursor: pointer; display: none; }
.oynatici.yuklu.durdu .orta-oynat { display: block; }
.orta-oynat:hover .oynat-ikon { transform: scale(1.06); background: var(--mavi-koyu); }
.oyn-bar { position: absolute; left: 10px; right: 10px; bottom: 10px; z-index: 4; color: #fff; background: rgba(11, 26, 48, .74); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); border-radius: 12px; padding: 2px 8px 4px; opacity: 0; transform: translateY(6px); pointer-events: none; transition: opacity .2s, transform .2s; }
.oynatici.yuklu.arac-acik .oyn-bar, .oynatici.yuklu.durdu .oyn-bar, .oynatici.yuklu .oyn-bar:focus-within { opacity: 1; transform: none; pointer-events: auto; }
.cubuk { position: relative; height: 18px; display: flex; align-items: center; cursor: pointer; touch-action: none; border-radius: 4px; }
.cubuk:focus-visible { outline: 2px solid #fff; outline-offset: 1px; }
.cubuk-iz { position: relative; flex: 1; height: 4px; border-radius: 2px; background: rgba(255, 255, 255, .3); transition: height .15s; }
.cubuk:hover .cubuk-iz, .cubuk.suruk .cubuk-iz { height: 6px; }
.cubuk-dolu { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--mavi); border-radius: inherit; }
.cubuk-dolu::after { content: ""; position: absolute; right: -6px; top: 50%; width: 12px; height: 12px; margin-top: -6px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .35); }
.cubuk-iz i { position: absolute; top: -1px; bottom: -1px; width: 3px; margin-left: -1.5px; background: rgba(11, 26, 48, .9); z-index: 1; }
.cubuk-ipucu { position: absolute; bottom: 22px; transform: translateX(-50%); background: rgba(11, 26, 48, .94); color: #fff; font-size: 12.5px; font-weight: 600; padding: 4px 9px; border-radius: 6px; white-space: pre; pointer-events: none; }
.bar-alt { display: flex; align-items: center; gap: 2px; }
.bd { display: inline-grid; place-items: center; min-width: 36px; height: 36px; padding: 0 6px; border: 0; border-radius: 8px; background: none; color: #fff; cursor: pointer; font-family: var(--baslik); font-weight: 700; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.bd:hover { background: rgba(255, 255, 255, .14); }
.bd:focus-visible { outline: 2px solid #fff; outline-offset: -2px; }
.bd svg { width: 22px; height: 22px; fill: currentColor; }
.bd-cc .cc-ikon { min-width: 26px; height: 18px; font-size: 10px; }
.bd-cc[aria-pressed="true"] { box-shadow: inset 0 -3px 0 var(--mavi); }
.ses { display: flex; align-items: center; }
.ses-ayar { width: 0; opacity: 0; margin: 0; accent-color: #fff; cursor: pointer; transition: width .2s, opacity .2s, margin .2s; }
.ses:hover .ses-ayar, .ses:focus-within .ses-ayar { width: 76px; opacity: 1; margin: 0 6px 0 2px; }
.bar-zaman { font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; margin: 0 6px; white-space: nowrap; }
.bar-bolum { flex: 1; min-width: 0; font-size: 13px; opacity: .85; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.yt-bitis { position: absolute; inset: 0; z-index: 5; display: none; place-items: center; background: rgba(11, 26, 48, .8) center / cover no-repeat; padding: 16px; }
.oynatici.bitti .yt-bitis { display: grid; }
.yt-bitis-ic { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.yt-bitis .dugme svg { width: 20px; height: 20px; }
/* ekran 16:9'dan genişse video yüksekliğe sığsın diye iframe daraltılıp ortalanır */
.oynatici.tam-acik.yt #yt-oyn, .oynatici.tam-sahte.yt #yt-oyn { width: min(100%, 100vh * 16 / 9); left: 50%; transform: translateX(-50%); }
.oynatici.tam-acik, .oynatici.tam-sahte { position: fixed; inset: 0; z-index: 1000; width: 100vw; height: 100vh; height: 100dvh; aspect-ratio: auto; border-radius: 0; box-shadow: none; }
@media (max-width: 639px) {
  .oyn-bar { left: 6px; right: 6px; bottom: 6px; padding: 0 4px 2px; }
  .bd { min-width: 32px; height: 32px; padding: 0 4px; }
  .ses-ayar, .bar-bolum { display: none; }
  .bar-zaman { flex: 1; font-size: 12px; }
  .oynatici.arac-acik .yt-altyazi, .oynatici.durdu .yt-altyazi { bottom: calc(6% + 50px); }
}
.ders-bas { padding: 8px 0 4px; }
.kod-rozet { display: inline-block; background: var(--lacivert); color: #fff; font-family: var(--baslik); font-weight: 700; font-size: 12px; letter-spacing: .14em; border-radius: 8px; padding: 4px 10px; margin: 0 0 10px; }
.ders-bas h1 { font-size: clamp(28px, 4.6vw, 40px); margin-bottom: 12px; }
.rozetler { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0 0 14px; }
.rozetler li { font-size: 13px; font-weight: 600; background: var(--zemin2); color: var(--lacivert); border-radius: 999px; padding: 4px 12px; }
.rozetler a { color: inherit; text-decoration: none; }
.rozetler a:hover { color: var(--mavi-koyu); text-decoration: underline; }
.rozetler .sure-rozet { background: #fff; border: 1px solid var(--cizgi); font-variant-numeric: tabular-nums; }
.ders-aciklama { font-size: 17px; color: #2A3D57; max-width: 760px; }
.yt-dugme { background: #fff; color: var(--lacivert); border: 1.5px solid var(--cizgi); }
.yt-dugme:hover { background: #fff; border-color: #E5484D; color: var(--lacivert); }
.yt-ikon { width: 24px; height: 17px; border-radius: 5px; background: #E62117; position: relative; }
.yt-ikon::after { content: ""; position: absolute; left: 9px; top: 4px; border-style: solid; border-width: 4.5px 0 4.5px 8px; border-color: transparent transparent transparent #fff; }

.kutu { background: #fff; border: 1px solid var(--cizgi); border-radius: var(--yaricap); padding: 16px 16px 14px; box-shadow: var(--golge); margin-top: 16px; }
.kutu h2 { font-size: 18px; margin-bottom: 10px; }
.ipucu { font-size: 13.5px; color: var(--soluk); margin: -4px 0 10px; }
.bolumler ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.git { cursor: pointer; }
.bolumler .git { display: flex; width: 100%; gap: 12px; align-items: center; text-align: left; background: none; border: 0; border-radius: 10px; padding: 8px 10px; font-weight: 500; }
.bolumler .git:hover { background: var(--zemin2); }
.bolumler .git.etkin { background: var(--zemin2); color: var(--mavi-koyu); font-weight: 600; }
.zaman { font-family: var(--baslik); font-weight: 700; font-size: 12.5px; font-variant-numeric: tabular-nums; color: var(--mavi-koyu); background: var(--zemin2); border-radius: 6px; padding: 2px 7px; min-width: 46px; text-align: center; }

.metin-kutu { margin-top: 0; padding: 0; display: flex; flex-direction: column; max-height: 55vh; }
.metin-bas { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 12px; padding: 14px 16px 10px; border-bottom: 1px solid var(--cizgi); }
.metin-bas h2 { margin: 0; }
.metin { position: relative; list-style: none; margin: 0; padding: 8px; overflow-y: auto; overscroll-behavior: contain; flex: 1; scroll-behavior: smooth; }
.metin li { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: baseline; padding: 7px 8px; border-radius: 10px; cursor: pointer; transition: background .2s; }
.metin li:hover { background: var(--kart); }
.metin button.zaman { border: 0; cursor: pointer; }
.metin button.zaman:hover { background: var(--mavi-koyu); color: #fff; }
.metin .cumle { color: #33465F; font-size: 15px; line-height: 1.55; }
.metin li.etkin { background: var(--zemin2); box-shadow: inset 3px 0 0 var(--mavi); }
.metin li.etkin .cumle { color: var(--lacivert); font-weight: 500; }
.metin li.etkin .zaman { background: var(--mavi-koyu); color: #fff; }
.metin li.hedef { animation: hedef 2.2s ease-out; }

/* yan panel: Bölümler / Ders metni sekmeleri (bölümü olan derslerde) */
.yan-kutu { margin-top: 0; padding: 0; display: flex; flex-direction: column; max-height: 55vh; }
.sekmeler { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 4px; padding: 6px 12px 0; border-bottom: 1px solid var(--cizgi); flex: none; }
.sekme { background: none; border: 0; border-bottom: 2.5px solid transparent; margin-bottom: -1px; padding: 10px 8px 9px; font-family: var(--baslik); font-weight: 700; font-size: 15.5px; color: var(--soluk); cursor: pointer; }
.sekme:hover { color: var(--lacivert); }
.sekme[aria-selected="true"] { color: var(--lacivert); border-bottom-color: var(--mavi); }
.sekmeler .takip-sec { margin-left: auto; padding: 6px 0; }
.yan-panel { min-height: 0; flex: 1; }
.yan-panel.bolumler { overflow-y: auto; overscroll-behavior: contain; padding: 8px; }
.sekmeli .metin-panel, .sekmeli .takip-sec { display: none; }
.sekmeli.metin-sekmesi .metin-panel { display: flex; flex-direction: column; }
.sekmeli.metin-sekmesi .takip-sec { display: inline-flex; }
.sekmeli.metin-sekmesi .yan-panel.bolumler { display: none; }
@keyframes hedef { 0% { background: rgba(255, 176, 32, .45); } 100% { background: var(--zemin2); } }

.etiketler { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.etiket { display: inline-block; text-decoration: none; color: var(--lacivert); font-size: 14px; font-weight: 500; border: 1.5px solid var(--cizgi); border-radius: 999px; padding: 4px 12px; background: #fff; }
.etiket:hover { border-color: var(--mavi); color: var(--mavi-koyu); background: var(--zemin2); }
.onkosul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.onkosul li { font-size: 15px; }
.onkosul a { text-decoration: none; font-weight: 600; }
.onkosul .kod { margin-right: 6px; }
.onkosul li.plan { color: var(--soluk); }
.ders-alt { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 18px; align-items: start; }
.kisa-liste { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.kisa { margin: 0; display: block; text-decoration: none; color: var(--lacivert); font-size: 13.5px; font-weight: 600; }
.kisa video, .kisa img { width: 100%; aspect-ratio: 9 / 16; object-fit: cover; border-radius: 12px; background: var(--zemin2); margin-bottom: 6px; }
.kisa.yatay img { aspect-ratio: 16 / 9; }
.komsular { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 24px; }
.komsular > a, .komsular > div { display: flex; flex-direction: column; gap: 3px; border: 1px solid var(--cizgi); border-radius: var(--yaricap); padding: 14px 16px; text-decoration: none; color: var(--lacivert); background: #fff; }
.komsular > a:hover { border-color: var(--mavi); box-shadow: var(--golge); }
.komsular .plan { background: var(--kart); border-style: dashed; }
.komsular .plan .yakinda { align-self: flex-start; margin-top: 4px; }
.komsular .sonraki.plan .yakinda { align-self: flex-end; }
.komsu-etiket { font-size: 12.5px; color: var(--soluk); font-weight: 600; }
.komsu-baslik { font-family: var(--baslik); font-weight: 600; font-size: 16px; line-height: 1.3; }
.komsular .sonraki { text-align: right; align-items: flex-end; }
.bos-komsu { border: 0 !important; background: none !important; }
.uyari { margin-top: 26px; font-size: 13px; color: var(--soluk); text-align: center; }

/* --- Hakkında --- */
.sayfa-bas { position: relative; overflow: hidden; background: linear-gradient(180deg, #fff, var(--zemin2)); border-bottom: 1px solid var(--cizgi); padding: 40px 0 70px; }
.sayfa-bas h1 { font-size: clamp(32px, 6vw, 48px); position: relative; }
.kucuk-slogan { font-size: clamp(22px, 4vw, 30px); position: relative; margin: 0; }
.metin-sayfa { padding-top: 30px; padding-bottom: 40px; font-size: 17px; }
.metin-sayfa h2 { font-size: 22px; margin-top: 1.6em; }
.metin-sayfa ul { padding-left: 1.2em; }
.metin-sayfa li { margin-bottom: 4px; }
.metin-sayfa .hesaplar { margin-top: 12px; }
.metin-sayfa .hesaplar ul { list-style: none; padding: 0; }

/* --- Alt bilgi --- */
.alt { position: relative; overflow: hidden; margin-top: 40px; background: linear-gradient(180deg, #fff, var(--zemin2)); border-top: 1px solid var(--cizgi); }
.alt .dalga-zemin { top: 0; bottom: auto; height: 120px; opacity: .7; transform: scaleY(-1); }
.alt-ic { position: relative; display: grid; grid-template-columns: 1fr; gap: 22px; padding-top: 34px; padding-bottom: 18px; }
.alt-marka img { height: 56px; width: auto; }
.alt-slogan { font-family: var(--baslik); font-weight: 600; color: var(--lacivert); margin: 10px 0 0; }
.alt-baslik { font-family: var(--baslik); font-weight: 700; margin: 0 0 8px; }
.alt ul { list-style: none; margin: 0; padding: 0; }
.alt li { margin-bottom: 4px; }
.alt a { text-decoration: none; font-weight: 500; }
.alt a:hover { text-decoration: underline; }
.hesaplar { display: flex; flex-wrap: wrap; gap: 6px 34px; }
.hesap-dil { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--soluk); margin: 0 0 4px; }
.alt-son { position: relative; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 20px; border-top: 1px solid var(--cizgi); padding-top: 14px; padding-bottom: 20px; font-size: 13px; color: var(--soluk); }
.alt-son p { margin: 0; }

/* --- Kök sayfa --- */
.kok-sayfa { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(180deg, #fff, var(--zemin2)); text-align: center; }
.kok-ic { padding: 24px; }
.kok-ic img { margin: 0 auto 16px; }
.kok-ic h1 { font-size: 28px; }
.kok-ic h1 .ikinci { color: var(--soluk); font-size: 22px; font-weight: 600; }
.kok-dil { display: flex; gap: 10px; justify-content: center; }

/* --- Daha geniş ekranlar --- */
@media (min-width: 640px) {
  .kap { padding-left: 24px; padding-right: 24px; }
  .kahraman-ic { padding-top: 40px; padding-bottom: 64px; }
  .sonuc { grid-template-columns: 176px 1fr; padding: 14px; }
  .komsular { grid-template-columns: 1fr 1fr; }
  .alt-ic { grid-template-columns: 1.2fr 1.4fr 1fr; }
  .filtre-ic { flex-direction: row; align-items: center; justify-content: space-between; flex-wrap: wrap; }
  .secim { flex: 0 1 230px; }
  .arama input { font-size: 17px; }
}
@media (min-width: 1000px) {
  .filtreler { position: sticky; top: 64px; }
  .logo img { height: 48px; }
  .kahraman-ic { padding-top: 48px; padding-bottom: 76px; }
  .ders-izgara { grid-template-columns: minmax(0, 1.75fr) minmax(320px, 1fr); grid-template-areas: "oyn yan" "bilgi yan"; align-items: start; }
  .ders-yan { position: sticky; top: 84px; align-self: start; }
  .ders-izgara.metin-kapali { grid-template-columns: minmax(0, 1fr); grid-template-areas: "oyn" "bilgi"; }
  .metin-kutu { max-height: calc(100vh - 110px); }
  /* sekmeli panel videoyla aynı boyda (yükseklik ders.js'ten --oyn-y olarak gelir) */
  .yan-kutu { height: var(--oyn-y, auto); max-height: calc(100vh - 110px); }
  .ders-alt { grid-template-columns: 1fr 1fr; }
  .ders-alt .kisa-bolum { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media print {
  .ust, .filtreler, .alt, .oynatici { display: none; }
  .metin-kutu, .yan-kutu { max-height: none; height: auto; }
}