:root {
  --zemin: #faf6ef;
  --kart: #fffdf9;
  --ana-ustu: #fbf8f2;
  --yazi: #1f2a30;
  --soluk: #5d6b72;
  --cizgi: #e7dfd2;
  --ana: #1d6f6a;
  --ana-koyu: #155550;
  --ana-acik: #e3f1ef;
  --vurgu: #e08a2c;
  --vurgu-acik: #fcefdf;
  --iyi: #2f8a4c;
  --uyari: #c2410c;
  --kotu: #b42318;
  --abi-balon: #f1ebe1;
  --golge: 0 1px 2px rgba(31, 42, 48, .06), 0 2px 8px rgba(31, 42, 48, .05);
  --yaricap: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --zemin: #161b1e;
    --kart: #1f262a;
    --yazi: #ecf0ee;
    --soluk: #a3b0b3;
    --cizgi: #313b40;
    --ana: #4fb3a9;
    --ana-koyu: #6cc7bd;
    --ana-acik: #1d3533;
    --vurgu: #f0a24e;
    --vurgu-acik: #3a2c1c;
    --iyi: #5cc27c;
    --uyari: #f08a4b;
    --kotu: #f2705f;
    --abi-balon: #2a3236;
    --golge: none;
    --ana-ustu: #10201f;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--zemin);
  color: var(--yazi);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
h1, h2, h3, .baslik-yazi { font-family: ui-rounded, "SF Pro Rounded", "Nunito", "Segoe UI Variable Display", system-ui, sans-serif; letter-spacing: -.01em; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: .95rem; }
p { margin: 0 0 .5rem; }
a { color: var(--ana); }
button, input, select, textarea { font: inherit; color: inherit; }
.gizli { display: none !important; }

/* --- iskelet --- */
.ust {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  padding: .7rem 1rem; background: var(--zemin);
  border-bottom: 1px solid var(--cizgi);
}
.ust .baslik { font-weight: 700; font-size: 1.1rem; }
.ust .baslik span { color: var(--vurgu); }
.ust .kim { color: var(--soluk); font-size: .85rem; display: flex; gap: .5rem; align-items: center; }
main { max-width: 760px; margin: 0 auto; padding: 1rem 1rem calc(84px + env(safe-area-inset-bottom)); }

.alt-menu {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 10;
  display: grid; grid-template-columns: repeat(7, 1fr);
  background: var(--kart); border-top: 1px solid var(--cizgi);
  padding-bottom: env(safe-area-inset-bottom);
}
.alt-menu a {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: .45rem 0 .5rem; text-decoration: none; color: var(--soluk);
  font-size: .7rem; font-weight: 600;
}
.alt-menu a svg { width: 22px; height: 22px; }
.alt-menu a.aktif { color: var(--ana); }
.alt-menu a.aktif svg { stroke-width: 2.4; }

/* --- kartlar --- */
.kart {
  background: var(--kart); border-radius: var(--yaricap);
  box-shadow: var(--golge); border: 1px solid var(--cizgi);
  padding: 1rem; margin-bottom: .9rem;
}
.izgara { display: grid; gap: .9rem; grid-template-columns: 1fr 1fr; margin-bottom: .9rem; }
.izgara .kart { margin: 0; }
@media (min-width: 640px) { .izgara.uc { grid-template-columns: repeat(3, 1fr); } }
.etiket { color: var(--soluk); font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.buyuk-sayi { font-size: 2rem; font-weight: 800; line-height: 1.1; }
.geri-sayim { background: var(--ana-koyu); color: var(--ana-ustu); border: 0; }
.geri-sayim .etiket { color: rgba(251,248,242,.85); }
.geri-sayim .buyuk-sayi { font-size: 2.8rem; }
.fark-arti { color: var(--iyi); font-weight: 700; font-size: .9rem; }
.fark-eksi { color: var(--kotu); font-weight: 700; font-size: .9rem; }
.bos { color: var(--soluk); font-style: italic; }

/* --- form --- */
label { display: block; font-size: .85rem; font-weight: 600; color: var(--soluk); margin-bottom: .25rem; }
input[type=text], input[type=password], input[type=number], input[type=date], select, textarea {
  width: 100%; padding: .6rem .7rem; border: 1px solid var(--cizgi); border-radius: 10px;
  background: var(--zemin); min-height: 44px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--ana); outline-offset: 1px; }
.satir { display: flex; gap: .6rem; }
.satir > * { flex: 1; min-width: 0; }
.alan { margin-bottom: .7rem; }
.dugme {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  min-height: 44px; padding: .55rem 1rem; border-radius: 10px; border: 0;
  background: var(--ana); color: var(--ana-ustu); font-weight: 700; cursor: pointer; text-decoration: none;
}
.dugme:hover:not(:disabled) { filter: brightness(1.06); }
.dugme:focus-visible, .cip:focus-visible, .sil:focus-visible, .yuvarlak:focus-visible, .alt-menu a:focus-visible { outline: 2px solid var(--vurgu); outline-offset: 2px; }
.dugme:active { transform: translateY(1px); }
.dugme.ikincil { background: var(--ana-acik); color: var(--ana-koyu); }
.dugme.vurgu { background: var(--vurgu); color: var(--ana-ustu); }
.dugme.tehlike { background: transparent; color: var(--kotu); border: 1px solid var(--cizgi); }
.dugme.kucuk { min-height: 34px; padding: .3rem .7rem; font-size: .85rem; }
.dugme.tam { width: 100%; }
.dugme:disabled { opacity: .55; cursor: default; }
.hata { color: var(--kotu); font-size: .9rem; margin: .4rem 0; }
.bilgi { color: var(--soluk); font-size: .85rem; }

/* --- deneme --- */
.ders-tablo { width: 100%; border-collapse: collapse; }
.ders-tablo th { text-align: left; font-size: .75rem; color: var(--soluk); font-weight: 600; padding: .2rem .25rem; }
.ders-tablo td { padding: .25rem; vertical-align: middle; }
.ders-tablo td:first-child { font-weight: 600; font-size: .9rem; }
.ders-tablo input { min-height: 40px; padding: .4rem; text-align: center; }
.ders-tablo .net { font-weight: 700; text-align: right; white-space: nowrap; }
.ders-tablo .soru { color: var(--soluk); font-weight: 400; font-size: .75rem; }
.toplam-net { display: flex; justify-content: space-between; align-items: baseline; margin: .6rem 0; font-weight: 700; }
.toplam-net strong { font-size: 1.5rem; color: var(--ana); }
.cipler { display: flex; gap: .4rem; overflow-x: auto; padding-bottom: .3rem; margin-bottom: .5rem; }
.cip {
  border: 1px solid var(--cizgi); background: var(--kart); border-radius: 999px;
  padding: .3rem .75rem; font-size: .85rem; white-space: nowrap; cursor: pointer; min-height: 34px;
}
.cip.aktif { background: var(--ana); color: var(--ana-ustu); border-color: var(--ana); }
.grafik { width: 100%; height: auto; display: block; }
.grafik .eksen { stroke: var(--cizgi); stroke-width: 1; }
.grafik .cizgi { fill: none; stroke: var(--ana); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.grafik .alanlik { fill: var(--ana); opacity: .1; }
.grafik .nokta { fill: var(--kart); stroke: var(--ana); stroke-width: 2.5; }
.grafik text { fill: var(--soluk); font-size: 11px; }
.grafik .deger { fill: var(--yazi); font-weight: 700; }
.deneme-ogesi { display: flex; justify-content: space-between; align-items: center; gap: .5rem; padding: .7rem 0; border-top: 1px solid var(--cizgi); }
.deneme-ogesi:first-child { border-top: 0; }
.deneme-ogesi .ad { font-weight: 600; }
.deneme-ogesi .ayrinti { font-size: .78rem; color: var(--soluk); }
.deneme-ogesi .netler { font-weight: 800; font-size: 1.15rem; color: var(--ana); }
.dugmeler { display: flex; gap: .4rem; flex-wrap: wrap; }

/* --- konular --- */
details.ders { background: var(--kart); border: 1px solid var(--cizgi); border-radius: var(--yaricap); margin-bottom: .6rem; box-shadow: var(--golge); }
details.ders > summary { list-style: none; cursor: pointer; padding: .85rem 1rem; }
details.ders > summary::-webkit-details-marker { display: none; }
.ders-ust { display: flex; justify-content: space-between; align-items: baseline; font-weight: 700; }
.ders-ust .yuzde { color: var(--ana); }
.cubuk { height: 8px; background: var(--ana-acik); border-radius: 99px; overflow: hidden; margin-top: .4rem; }
.cubuk > i { display: block; height: 100%; background: var(--ana); border-radius: 99px; }
.unite { padding: .2rem 1rem .8rem; }
.unite h3 { font-size: .85rem; color: var(--soluk); margin: .6rem 0 .3rem; }
.konu { display: flex; align-items: center; justify-content: space-between; gap: .6rem; padding: .4rem 0; border-top: 1px dashed var(--cizgi); }
.konu span { font-size: .92rem; }
.konu select { width: auto; min-width: 128px; min-height: 36px; padding: .25rem .4rem; font-size: .82rem; font-weight: 600; }
.durum-baslanmadi { color: var(--soluk); }
.durum-calisiyorum { color: var(--ana); background: var(--ana-acik) !important; }
.durum-eksik { color: var(--uyari); background: var(--vurgu-acik) !important; }
.durum-tamam { color: var(--iyi); }
.rozet { display: inline-block; font-size: .72rem; font-weight: 700; padding: .1rem .5rem; border-radius: 99px; background: var(--vurgu-acik); color: var(--uyari); }

/* --- plan --- */
.hafta-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: .6rem; }
.gun { margin-bottom: .8rem; }
.gun h3 { font-size: .9rem; display: flex; justify-content: space-between; color: var(--soluk); margin-bottom: .3rem; }
.gun.bugun h3 { color: var(--ana); }
.gorev { display: flex; align-items: center; gap: .6rem; padding: .55rem .2rem; border-top: 1px solid var(--cizgi); }
.gorev:first-of-type { border-top: 0; }
.gorev input[type=checkbox] { width: 24px; height: 24px; accent-color: var(--ana); flex: none; }
.gorev .metin { flex: 1; min-width: 0; }
.gorev .metin small { display: block; color: var(--soluk); font-size: .8rem; }
.gorev.bitti .metin { text-decoration: line-through; color: var(--soluk); }
.sil { background: none; border: 0; color: var(--soluk); font-size: 1.2rem; width: 36px; height: 36px; border-radius: 8px; cursor: pointer; flex: none; }
.sil:hover { color: var(--kotu); background: var(--vurgu-acik); }

/* --- kaynak --- */
.kaynak { padding: .7rem 0; border-top: 1px solid var(--cizgi); }
.kaynak:first-child { border-top: 0; }
.kaynak-ust { display: flex; justify-content: space-between; gap: .5rem; align-items: baseline; }
.kaynak-ust b { font-size: .98rem; }
.kaynak .alt { display: flex; gap: .5rem; align-items: center; margin-top: .5rem; flex-wrap: wrap; }
.kaynak .alt input { width: 90px; min-height: 36px; padding: .3rem .4rem; }

/* --- odak --- */
.sayac-kutu { text-align: center; }
.sayac { position: relative; width: min(260px, 70vw); margin: .5rem auto 1rem; }
.sayac svg { width: 100%; height: auto; transform: rotate(-90deg); }
.sayac .iz { fill: none; stroke: var(--ana-acik); stroke-width: 10; }
.sayac .ilerleme { fill: none; stroke: var(--ana); stroke-width: 10; stroke-linecap: round; transition: stroke-dashoffset .5s linear; }
.sayac.mola .ilerleme { stroke: var(--vurgu); }
.sayac .zaman { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.sayac .zaman b { font-size: 3rem; font-variant-numeric: tabular-nums; letter-spacing: .02em; }
.sayac .zaman span { color: var(--soluk); font-weight: 600; }

/* --- Abi --- */
.abi-sayfa { display: flex; flex-direction: column; height: calc(100dvh - 58px - 72px - env(safe-area-inset-bottom)); margin: -1rem -1rem 0; }
.abi-ust { display: flex; gap: .5rem; align-items: center; padding: .6rem 1rem; border-bottom: 1px solid var(--cizgi); background: var(--kart); }
.abi-ust .avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--vurgu); color: var(--ana-ustu); display: grid; place-items: center; font-weight: 800; flex: none; }
.abi-ust .ad { font-weight: 700; line-height: 1.1; }
.abi-ust .ad small { display: block; font-weight: 400; color: var(--soluk); font-size: .78rem; }
.abi-ust .bosluk { flex: 1; }
.abi-ust select { width: auto; max-width: 120px; min-height: 36px; padding: .2rem .3rem; font-size: .8rem; }
.mesajlar { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: .55rem; }
.balon { max-width: 85%; padding: .6rem .85rem; border-radius: 18px; word-wrap: break-word; overflow-wrap: anywhere; }
.balon p:last-child, .balon ul:last-child, .balon ol:last-child { margin-bottom: 0; }
.balon ul, .balon ol { margin: .2rem 0 .5rem; padding-left: 1.2rem; }
.balon.ben { align-self: flex-end; background: var(--ana); color: var(--ana-ustu); border-bottom-right-radius: 6px; }
.balon.abi { align-self: flex-start; background: var(--abi-balon); border-bottom-left-radius: 6px; }
.balon.sistem { align-self: center; background: var(--vurgu-acik); color: var(--uyari); font-size: .9rem; text-align: center; }
.balon .foto-not { font-size: .78rem; opacity: .85; display: block; }
.balon img { max-width: 100%; border-radius: 10px; display: block; margin-bottom: .3rem; }
.video-baglanti { display: inline-flex; align-items: center; gap: .3rem; font-weight: 600; background: var(--kart); border: 1px solid var(--cizgi); border-radius: 99px; padding: .1rem .6rem; text-decoration: none; margin: .1rem 0; }
.yaziyor { align-self: flex-start; color: var(--soluk); font-size: .85rem; padding: .3rem .6rem; }
.giris-cubugu { display: flex; gap: .4rem; align-items: flex-end; padding: .5rem .6rem; border-top: 1px solid var(--cizgi); background: var(--kart); }
.giris-cubugu textarea { resize: none; min-height: 44px; max-height: 120px; border-radius: 22px; padding: .6rem .9rem; }
.yuvarlak { width: 44px; height: 44px; flex: none; border-radius: 50%; border: 0; display: grid; place-items: center; cursor: pointer; background: var(--ana-acik); color: var(--ana-koyu); }
.yuvarlak.gonder { background: var(--ana); color: var(--ana-ustu); }
.yuvarlak svg { width: 22px; height: 22px; }
.onizleme { display: flex; align-items: center; gap: .5rem; padding: .4rem .8rem; background: var(--kart); border-top: 1px solid var(--cizgi); }
.onizleme img { height: 56px; border-radius: 8px; }
.karsilama { text-align: center; color: var(--soluk); margin: auto 0; padding: 1rem; }
.karsilama b { color: var(--yazi); display: block; font-size: 1.1rem; margin-bottom: .3rem; }

/* --- giris sayfasi --- */
.giris-sayfa { min-height: 100dvh; display: grid; place-items: center; padding: 1rem; }
.giris-kart { width: 100%; max-width: 380px; }
.giris-kart .logo { font-size: 1.6rem; font-weight: 800; margin-bottom: .2rem; }
.giris-kart .logo span { color: var(--vurgu); }

.salt-okunur .yazma { display: none !important; }
.yukleniyor { color: var(--soluk); text-align: center; padding: 2rem 0; }