/* Yoklama — ortak stil. Sade, açık tema: Inter, #2f54eb ana renk, yumuşak köşeler, ince çizgi + hafif gölge. */
:root {
  --zemin: #f4f6fa;
  --zemin-2: #eceff5;
  --kart: #ffffff;
  --cizgi: #e4e7ee;
  --cizgi-koyu: #cdd2dc;
  --metin: #141a2b;
  --soluk: #5d6475;
  --ana: #2f54eb;
  --ana-2: #2443c8;
  --ana-z: rgba(47, 84, 235, .08);
  --yesil: #15803d;   --yesil-z: #e9f7ef;
  --turuncu: #c2410c; --turuncu-z: #fff3e8;
  --kirmizi: #dc2626; --kirmizi-z: #fdeeee;
  --e1: 0 1px 2px rgba(20, 26, 43, .05), 0 1px 1px rgba(20, 26, 43, .03);
  --e2: 0 1px 2px rgba(20, 26, 43, .08), 0 2px 6px rgba(20, 26, 43, .06);
  --e4: 0 4px 12px rgba(20, 26, 43, .08), 0 1px 3px rgba(20, 26, 43, .06);
  --e8: 0 12px 32px rgba(20, 26, 43, .14), 0 2px 6px rgba(20, 26, 43, .08);
  --golge: var(--e1);
  --r: 14px;
  --r-k: 10px;
  --serif: Inter, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --sans: var(--serif);
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 400 15px/1.55 var(--sans); color: var(--metin); -webkit-font-smoothing: antialiased; font-feature-settings: "cv11", "ss01";
  background: var(--zemin); min-height: 100vh; }
h1, h2, h3 { font-family: var(--sans); margin: 0; color: var(--metin); letter-spacing: -.015em; }
h1 { font-size: 1.75rem; font-weight: 650; line-height: 1.2; letter-spacing: -.025em; }
h2 { font-size: 1.125rem; font-weight: 600; line-height: 1.45; }
h3 { font-size: 1rem; font-weight: 600; line-height: 1.5; }
p { margin: 0; }
a { color: var(--ana); text-underline-offset: 2px; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--ana); outline-offset: 2px; }
::selection { background: rgba(47, 84, 235, .18); }
.soluk { color: var(--soluk); font-size: .875rem; line-height: 1.5; }
.kucuk-yazi { font-size: .78rem; }
.orta { text-align: center; }

/* Üst çubuk */
.ust { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 16px; padding: 0 24px; min-height: 64px;
  background: rgba(255, 255, 255, .86); -webkit-backdrop-filter: saturate(180%) blur(12px); backdrop-filter: saturate(180%) blur(12px);
  color: var(--metin); border-bottom: 1px solid var(--cizgi); }
.marka { display: flex; align-items: center; gap: 10px; font-size: 1.05rem; font-weight: 650; letter-spacing: -.01em; white-space: nowrap; color: var(--metin); min-width: 0; }
.marka svg { width: 30px; height: 30px; flex: none; border-radius: 9px; box-shadow: 0 2px 6px rgba(47, 84, 235, .35); }
.marka svg rect { fill: var(--ana); }
.marka .ayrac { color: var(--cizgi-koyu); font-weight: 400; }
.marka .ders { font-size: .95rem; font-weight: 500; color: var(--soluk); overflow: hidden; text-overflow: ellipsis; }
.ust .bosluk { flex: 1; }
.ust .baglanti { background: none; border: 1px solid var(--cizgi); color: var(--metin); font: 500 .85rem var(--sans);
  cursor: pointer; padding: 6px 12px; border-radius: 999px; transition: background .15s, border-color .15s; }
.ust .baglanti:hover { background: var(--zemin); border-color: var(--cizgi-koyu); }

/* Sekmeler */
.sekmeler { display: flex; align-self: stretch; gap: 4px; }
.sekmeler button { position: relative; background: none; border: 0; color: var(--soluk); font: 500 .875rem var(--sans);
  padding: 12px 14px; min-height: 64px; cursor: pointer; white-space: nowrap; transition: color .15s; }
.sekmeler button:hover { color: var(--metin); }
.sekmeler button.aktif { color: var(--ana); font-weight: 600; }
.sekmeler button.aktif::after { content: ""; position: absolute; left: 10px; right: 10px; bottom: -1px; height: 2px; border-radius: 2px; background: var(--ana); }

/* Düzen */
.sayfa { max-width: 1152px; margin: 28px auto 56px; padding: 0 24px; }
.izgara { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.izgara + .kart, .kart + .kart { margin-top: 24px; }
.yigin { display: grid; gap: 24px; }
.yigin > .kart + .kart, .izgara .kart + .kart { margin-top: 0; }

@media (max-width: 860px) {
  .izgara { grid-template-columns: 1fr; }
  .ust { flex-wrap: wrap; gap: 0 12px; padding: 0 16px; min-height: 56px; }
  .ust .marka { flex: 1 1 0; min-height: 56px; }
  .ust .bosluk { display: none; }
  .marka .ders { min-width: 0; }
  .sekmeler { order: 3; width: calc(100% + 32px); margin: 0 -16px; overflow-x: auto; }
  .sekmeler button { min-height: 48px; flex: 1 0 auto; }
  .sayfa { padding: 0 16px; margin-top: 16px; }
}

/* Paper / Card */
.kart { background: var(--kart); border-radius: var(--r); padding: 18px; border: 1px solid var(--cizgi); box-shadow: var(--e1); }
@media (min-width: 600px) { .kart { padding: 24px; } }
.kart-baslik { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.kart-baslik p { margin-top: 2px; }

/* Düğme */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-width: 64px; min-height: 40px; padding: 8px 16px; border-radius: var(--r-k);
  border: 1px solid transparent; background: var(--ana); color: #fff; font: 600 .875rem/1.4 var(--sans);
  cursor: pointer; text-decoration: none; box-shadow: 0 1px 2px rgba(20, 26, 43, .12), inset 0 1px 0 rgba(255, 255, 255, .14);
  transition: background-color .15s, box-shadow .15s, transform .1s, border-color .15s; }
.btn:hover { background-color: var(--ana-2); box-shadow: 0 4px 12px rgba(47, 84, 235, .28); }
.btn:active { transform: translateY(1px); box-shadow: none; }
.btn:disabled { background: var(--zemin-2); color: #a0a6b4; box-shadow: none; cursor: default; transform: none; }
.btn.ikincil { background: #fff; color: var(--metin); box-shadow: var(--e1); border-color: var(--cizgi-koyu); }
.btn.ikincil:hover { background: var(--zemin); border-color: #b5bccb; }
.btn.yumusak { background: transparent; color: var(--ana); box-shadow: none; padding: 8px 10px; }
.btn.yumusak:hover { background: var(--ana-z); }
.btn.tehlike { background-color: var(--kirmizi); }
.btn.tehlike:hover { background-color: #b91c1c; box-shadow: 0 4px 12px rgba(220, 38, 38, .28); }
.btn.buyuk { width: 100%; min-height: 48px; padding: 10px 22px; font-size: .95rem; }
.btn.kucuk { min-height: 32px; padding: 5px 12px; font-size: .8125rem; border-radius: 8px; }
.btn svg { width: 18px; height: 18px; }

/* Rozet */
.rozet { display: inline-flex; align-items: center; gap: 6px; min-height: 24px; padding: 3px 10px; border-radius: 999px; font-size: .78rem; font-weight: 600; line-height: 1.2;
  white-space: nowrap; background: var(--zemin-2); color: var(--soluk); }
.rozet::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: .9; }
.rozet.yesil { color: var(--yesil); background: var(--yesil-z); }
.rozet.turuncu { color: var(--turuncu); background: var(--turuncu-z); }
.rozet.kirmizi { color: var(--kirmizi); background: var(--kirmizi-z); }
.rozet.gri { color: var(--soluk); background: var(--zemin-2); }
.rozet.mavi { color: var(--ana); background: var(--ana-z); }

/* Metin alanı */
.alan { width: 100%; min-height: 46px; padding: 11px 14px; font: 400 .95rem var(--sans); color: var(--metin); background: #fff;
  border: 1px solid var(--cizgi-koyu); border-radius: var(--r-k); outline: none; box-shadow: var(--e1); transition: border-color .15s, box-shadow .15s; }
.alan::placeholder { color: #9aa1b0; }
.alan:hover { border-color: #b5bccb; }
.alan:focus { border-color: var(--ana); box-shadow: 0 0 0 4px rgba(47, 84, 235, .14); }
textarea.alan { resize: vertical; min-height: 120px; font: 13.5px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; }
.etiket { display: block; font-size: .82rem; font-weight: 600; color: var(--metin); margin-bottom: 6px; }
.hata-yazi { color: var(--kirmizi); font-size: .8rem; font-weight: 500; min-height: 1.4em; margin-top: 3px; }
.satir { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* Alert (info) */
.ipucu { display: flex; gap: 12px; align-items: flex-start; padding: 6px 16px; background: #eef3ff; color: #1e3a8a; border: 1px solid #d9e3ff; border-radius: var(--r-k); font-size: .875rem; line-height: 1.43; }
.ipucu svg { width: 22px; height: 22px; flex: none; padding: 7px 0; box-sizing: content-box; color: var(--ana); }
.ipucu > :not(svg) { padding: 8px 0; }

/* Liste satırı + Switch */
.secenek { display: grid; grid-template-columns: 58px 1fr; gap: 2px 12px; padding: 16px 0; border-top: 1px solid var(--cizgi); }
.secenek:first-of-type { border-top: 0; padding-top: 4px; }
.secenek > :first-child { grid-row: span 2; }
.secenek .aciklama { grid-column: 2; }
.secenek .ic { grid-column: 2; margin-top: 12px; display: grid; gap: 10px; }
.anahtar { position: relative; width: 58px; height: 38px; }
.anahtar input { opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; position: relative; z-index: 1; }
.anahtar span { position: absolute; top: 12px; left: 12px; width: 34px; height: 14px; background: #c3c8d3; border-radius: 7px; transition: background .15s; }
.anahtar span::after { content: ""; position: absolute; top: -3px; left: -3px; width: 20px; height: 20px; background: #fafafa; border-radius: 50%;
  box-shadow: var(--e1); transition: transform .15s, background .15s; }
.anahtar input:checked + span { background: rgba(47, 84, 235, .45); }
.anahtar input:checked + span::after { transform: translateX(20px); background: var(--ana); }
.anahtar input:focus-visible + span::after { box-shadow: 0 0 0 9px rgba(47, 84, 235, .12); }

/* Table */
.tablo-kap { overflow-x: auto; margin: 0 -24px -24px; }
@media (max-width: 599px) { .tablo-kap { margin: 0 -16px -16px; } }
.tablo { width: 100%; border-collapse: collapse; font-size: .875rem; line-height: 1.43; font-variant-numeric: tabular-nums; }
.tablo th { text-align: left; font-weight: 600; font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; color: var(--soluk); padding: 12px 16px;
  background: #f8f9fc; border-bottom: 1px solid var(--cizgi); white-space: nowrap; }
.tablo td { padding: 14px 16px; border-bottom: 1px solid var(--cizgi); vertical-align: middle; }
.tablo tr:last-child td { border-bottom: 0; }
.tablo tbody tr:hover td { background: #f8f9fc; }
.tablo tr.hatali td { background: var(--kirmizi-z); }
.tablo .sag { text-align: right; white-space: nowrap; }
.tablo input.alan { min-height: 36px; padding: 6px 12px; box-shadow: none; font-size: .875rem; min-width: 130px; }
.tablo .rozet { white-space: nowrap; }
.liste-tablo td { padding-top: 6px; padding-bottom: 6px; }
.bos { padding: 32px 16px; text-align: center; color: var(--soluk); }
.bos h3 { color: var(--metin); margin-bottom: 4px; }

/* İstatistik */
.etiket-buyuk { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--soluk); }
.sayi { font-size: 3rem; font-weight: 650; letter-spacing: -.03em; line-height: 1.167; margin-top: 4px; color: var(--metin); font-variant-numeric: tabular-nums; }
.sayi .toplam { font-size: 1.5rem; color: var(--soluk); margin-left: 4px; }
.cubuk { height: 6px; border-radius: 999px; background: var(--yesil-z); overflow: hidden; margin-top: 16px; }
.cubuk i { display: block; height: 100%; width: 0; border-radius: inherit; background: var(--yesil); transition: width .4s linear; }
.yuzde-cubuk { display: inline-block; width: 90px; height: 6px; border-radius: 999px; background: var(--zemin-2); overflow: hidden; vertical-align: middle; margin-right: 8px; }
.yuzde-cubuk i { display: block; height: 100%; border-radius: inherit; background: var(--yesil); }
.yuzde-cubuk.dusuk i { background: var(--kirmizi); }

/* QR kartı ve projeksiyon modu */
.qr-alan { position: relative; display: grid; place-items: center; aspect-ratio: 1; max-width: 420px; margin: 0 auto;
  background: #fff; border: 1px solid var(--cizgi); border-radius: var(--r-k); }
#qr { width: 100%; padding: 16px; }
#qr svg { width: 100%; height: auto; display: block; }
.qr-bos { text-align: center; color: var(--soluk); padding: 24px; display: grid; gap: 8px; justify-items: center; }
.qr-bos svg { width: 40px; height: 40px; color: #bdbdbd; }
.qr-alt { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 12px; color: var(--soluk); font-size: .875rem; }
.proj-bilgi, .proj-sayi { display: none; }
#qrKutu:fullscreen { background: #fff; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; border-radius: 0; box-shadow: none; }
#qrKutu:fullscreen .kart-baslik { display: none; }
#qrKutu:fullscreen .qr-alan { width: min(72vh, 90vw); max-width: none; border: 0; }
#qrKutu:fullscreen .qr-alt { font-size: 20px; }
#qrKutu:fullscreen .proj-bilgi { display: block; font-size: 22px; color: var(--soluk); text-align: center; }
#qrKutu:fullscreen .proj-sayi { display: block; position: absolute; top: 24px; right: 32px; font: 500 30px var(--sans); color: var(--ana); }

/* Küçük resim */
img.foto { width: 56px; height: 42px; object-fit: cover; border-radius: 8px; cursor: zoom-in; display: block; }
img.foto.buyuk { width: 320px; height: auto; cursor: zoom-out; }

/* Snackbar */
.bildirim { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: #141a2b; color: #fff;
  padding: 13px 18px; border-radius: 12px; font-size: .875rem; font-weight: 500; line-height: 1.43; box-shadow: var(--e8); animation: belir .2s ease-out;
  z-index: 50; min-width: 288px; max-width: calc(100% - 32px); }

/* ---- Öğrenci (mobil) ---- */
.mobil { max-width: 460px; margin: 0 auto; padding: 16px 16px 32px; min-height: calc(100dvh - 56px); display: flex; flex-direction: column; gap: 16px; }
.mobil .bosluk { flex: 1; }
.ders-kart .ders-ad { font-size: 1.5rem; font-weight: 650; letter-spacing: -.02em; margin: 4px 0 14px; line-height: 1.25; }
.durum-ekran { text-align: center; display: grid; gap: 8px; justify-items: center; padding: 0 8px; }
.durum-ikon { width: 84px; height: 84px; box-shadow: 0 0 0 10px rgba(255, 255, 255, .7), 0 0 0 11px var(--cizgi); border-radius: 50%; display: grid; place-items: center; margin-bottom: 8px; }
.durum-ikon svg { width: 40px; height: 40px; }
.durum-ikon.yesil { background: var(--yesil-z); color: var(--yesil); }
.durum-ikon.turuncu { background: var(--turuncu-z); color: var(--turuncu); }
.durum-ikon.kirmizi { background: var(--kirmizi-z); color: var(--kirmizi); }
.durum-ikon.mavi { background: var(--ana-z); color: var(--ana); }

.vizor { position: relative; border-radius: var(--r); overflow: hidden; background: #0f1320; aspect-ratio: 3 / 4; box-shadow: var(--e4); }
.vizor video { width: 100%; height: 100%; object-fit: cover; display: block; }
.vizor .cerceve { position: absolute; inset: 20% 12%; pointer-events: none; --k: rgba(255, 255, 255, .9); --u: 28px; --k2: 3px;
  background:
    linear-gradient(var(--k), var(--k)) top left / var(--u) var(--k2), linear-gradient(var(--k), var(--k)) top left / var(--k2) var(--u),
    linear-gradient(var(--k), var(--k)) top right / var(--u) var(--k2), linear-gradient(var(--k), var(--k)) top right / var(--k2) var(--u),
    linear-gradient(var(--k), var(--k)) bottom left / var(--u) var(--k2), linear-gradient(var(--k), var(--k)) bottom left / var(--k2) var(--u),
    linear-gradient(var(--k), var(--k)) bottom right / var(--u) var(--k2), linear-gradient(var(--k), var(--k)) bottom right / var(--k2) var(--u);
  background-repeat: no-repeat; }
.vizor-mesaj { text-align: center; min-height: 3.2em; color: var(--soluk); }
.adimlar { margin: 4px 0 0; padding-left: 22px; color: var(--soluk); font-size: .9375rem; text-align: left; }
.adimlar li { margin: 4px 0; }
.gecmis { display: grid; gap: 0; }
.gecmis div { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-top: 1px solid var(--cizgi); font-size: .9375rem; }
.gecmis div:first-child { border-top: 0; }
details.kart summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
details.kart summary::-webkit-details-marker { display: none; }
details.kart summary::after { content: ""; width: 8px; height: 8px; margin-right: 6px; border: solid var(--soluk); border-width: 0 2px 2px 0; transform: rotate(45deg); transition: transform .2s; }
details.kart[open] summary::after { transform: rotate(-135deg); }
details.kart[open] summary { margin-bottom: 12px; }
.alt-bilgi { text-align: center; font-size: .75rem; color: var(--soluk); }
.alt-bilgi a { color: var(--soluk); }

/* Gizlilik metni */
.metin { max-width: 720px; margin: 24px auto 48px; padding: 0 16px; }
.metin h1 { margin-bottom: 8px; }
.metin h2 { margin: 24px 0 8px; }
.metin p, .metin li { color: var(--soluk); margin: 8px 0; }
.metin .taslak { margin: 16px 0 8px; }

/* ---- Ek bileşenler ---- */
.kisi { display: flex; align-items: center; gap: 12px; min-width: 0; }
.avatar { width: 32px; height: 32px; flex: none; border-radius: 50%; display: grid; place-items: center;
  font: 600 .78rem var(--sans); color: hsl(var(--ton) 55% 32%); background: hsl(var(--ton) 70% 92%); }

/* Canlı: küçük dolu Chip */
.canli { display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 10px; border-radius: 16px; font-size: .8125rem;
  color: #fff; background: var(--kirmizi); }
.canli::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; animation: yanip 1.4s ease-in-out infinite; }
@keyframes yanip { 50% { opacity: .3; } }

/* Giriş kartı */
.giris-kart { padding: 32px 24px; box-shadow: var(--e4); }
.giris-ikon { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 18px; color: #fff;
  background: linear-gradient(135deg, #4f6ff5, var(--ana-2)); box-shadow: 0 6px 16px rgba(47, 84, 235, .3); }
.giris-ikon svg { width: 22px; height: 22px; }

/* Öğrenci ana kartı */
.ders-kart { position: relative; overflow: hidden; color: #fff; border: 0; padding: 22px;
  background: radial-gradient(120% 140% at 100% 0%, rgba(255, 255, 255, .18), transparent 55%), linear-gradient(140deg, #3d62f2, #1f3bb3);
  box-shadow: 0 10px 28px rgba(36, 67, 200, .28); }
.ders-kart .selam { color: rgba(255, 255, 255, .8); font-size: .875rem; }
.ders-kart .ders-ad { color: #fff; }
.ders-kart .soluk { color: rgba(255, 255, 255, .8); }
.ders-kart .rozet { color: #fff; background: rgba(255, 255, 255, .18); }

/* Devam halkası (CircularProgress) */
.devam { display: flex; align-items: center; gap: 16px; }
.devam-halka { width: 56px; height: 56px; flex: none; }
.devam-halka circle { fill: none; stroke-width: 3.6; stroke-linecap: round; transform: rotate(-90deg); transform-origin: 50% 50%; }
.devam-halka .iz { stroke: var(--zemin-2); }
.devam-halka .dolu { stroke: var(--yesil); }
.devam-halka.dusuk .dolu { stroke: var(--kirmizi); }
.devam-halka text { font: 650 7.4px var(--sans); fill: var(--metin); text-anchor: middle; }

/* Vizör tarama çizgisi */
.tarama { position: absolute; left: 8%; right: 8%; top: 0; height: 2px; background: #7c93ff; box-shadow: 0 0 12px #7c93ff; opacity: .8;
  animation: tara 2.4s ease-in-out infinite alternate; }
@keyframes tara { to { top: 100%; } }

/* Kapanış bekleme: Alert (warning / error) */
.uyari-kart { border-radius: var(--r-k); border: 1px solid #fed7aa; padding: 14px 16px; background: #fff4e5; color: #663c00; font-size: .875rem; line-height: 1.43; }
.uyari-ust { display: flex; align-items: center; gap: 12px; font-size: 1rem; font-weight: 500; color: #663c00; }
.uyari-ust svg { width: 22px; height: 22px; color: var(--turuncu); }
.uyari-kart ul { list-style: none; margin: 12px 0; padding: 0; display: grid; gap: 8px; }
.uyari-kart li { display: flex; align-items: center; gap: 10px; font-weight: 500; }
.uyari-kart li svg { width: 18px; height: 18px; flex: none; color: var(--kirmizi); }
.uyari-kart p { color: inherit; }
.uyari-kart.ihlal { background: var(--kirmizi-z); border-color: #fecaca; color: #5f2120; animation: titre .45s; }
.uyari-kart.ihlal .uyari-ust { color: #5f2120; }
.uyari-kart.ihlal .uyari-ust svg { color: var(--kirmizi); }
.uyari-kart.ihlal::before { content: "Ekrandan ayrıldığın kaydedildi."; display: block; margin-bottom: 10px; padding: 6px 12px; border-radius: 8px;
  background: var(--kirmizi); color: #fff; font-weight: 500; font-size: .875rem; }
@keyframes titre { 20%, 60% { transform: translateX(-6px); } 40%, 80% { transform: translateX(6px); } }
@keyframes belir { from { opacity: 0; transform: translate(-50%, 8px); } }
@media (prefers-reduced-motion: reduce) { .tarama, .canli::before, .uyari-kart.ihlal, .bildirim { animation: none; } }
.kisi b { white-space: nowrap; font-weight: 500; }
.qr-bos > svg { box-sizing: content-box; padding: 0; background: none; }
.yuzde-rozet { float: right; display: inline-flex; align-items: center; height: 24px; padding: 0 10px; border-radius: 999px; font-size: .78rem; font-weight: 600; color: var(--yesil); background: var(--yesil-z); }
.btn.katil { min-height: 56px; padding: 14px 22px; font-size: 1rem; border-radius: var(--r); box-shadow: 0 8px 22px rgba(47, 84, 235, .32); }