/* Çözüm Kümesi – "Defter" düzeni */
:root {
  --zemin: #FBFBF8;
  --kare: #EDEFF2;
  --beyaz: #FFFFFF;
  --koyu: #1F3A48;
  --metin: #4E5A61;
  --soluk: #5E6A70;
  --cizgi: #E2E4E8;
  --kesik: #C9CED4;
  --petrol: #35627A;
  --petrol-koyu: #24475A;
  --pembe: #E5AEA9;
  --pembe-acik: #F6E2E0;
  --kiremit: #B46258;
  --lavanta: #A6A9D0;
  --lavanta-acik: #E3E4F2;
  --adacayi-acik: #E3E8E7;
  --mavi-acik: #DCE7ED;
  --baslik: "Nunito", system-ui, sans-serif;
  --govde: "Nunito Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--koyu); font-family: var(--govde); line-height: 1.5;
  background-color: var(--zemin);
  background-image: linear-gradient(var(--kare) 1px, transparent 1px), linear-gradient(90deg, var(--kare) 1px, transparent 1px);
  background-size: 28px 28px;
}
img { max-width: 100%; display: block; }
a { color: var(--petrol); }
a:hover { color: var(--petrol-koyu); }
h1, h2, h3 { font-family: var(--baslik); font-weight: 800; margin: 0; line-height: 1.12; }
p { margin: 0; }
section[id] { scroll-margin-top: 90px; }
.kap { max-width: 1120px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
:focus-visible { outline: 3px solid var(--petrol); outline-offset: 2px; }

/* Üst menü */
.ust { position: sticky; top: 0; z-index: 50; background: rgba(251,251,248,0.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--cizgi); }
.ust nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding-top: 16px; padding-bottom: 16px; }
.marka { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--koyu); }
.marka img { width: 42px; height: 42px; }
.marka span { font-family: var(--baslik); font-weight: 800; font-size: 21px; }
.menu { display: flex; flex-wrap: wrap; align-items: center; gap: 26px; font-weight: 700; font-size: 15px; }
.menu a { text-decoration: none; color: var(--koyu); }
.menu a b { color: var(--lavanta); font-weight: 800; margin-right: 4px; }
.menu a:hover { color: var(--petrol); }
.menu .cta { color: var(--kiremit); }
.menu .cta:hover { color: #8F4A42; }
.hamburger { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1.5px solid var(--koyu); background: var(--beyaz); color: var(--koyu); align-items: center; justify-content: center; cursor: pointer; padding: 0; }
.hamburger .kapat { display: none; }
.hamburger[aria-expanded="true"] .ac { display: none; }
.hamburger[aria-expanded="true"] .kapat { display: block; }
@media (max-width: 820px) {
  .hamburger { display: flex; }
  .menu { display: none; width: 100%; flex-direction: column; align-items: stretch; gap: 0; padding-top: 4px; }
  .menu.acik { display: flex; }
  .menu a { min-height: 48px; display: flex; align-items: center; font-size: 17px; border-top: 1px dashed var(--kesik); }
}

/* Butonlar */
.btn { text-decoration: none; font-weight: 700; padding: 14px 24px; border-radius: 12px; min-height: 48px; display: inline-flex; align-items: center; justify-content: center; }
.btn-koyu { background: var(--koyu); color: var(--beyaz); }
.btn-koyu:hover { background: var(--petrol); color: var(--beyaz); }
.btn-ana { background: var(--petrol); color: var(--beyaz); }
.btn-ana:hover { background: var(--petrol-koyu); color: var(--beyaz); }
.btn-ikincil { background: var(--beyaz); color: var(--koyu); border: 1.5px solid var(--koyu); }
.btn-ikincil:hover { background: var(--lavanta-acik); color: var(--koyu); }
.btn-wp { background: var(--pembe); color: #3B1F1C; }
.btn-wp:hover { background: #EDC1BD; color: #3B1F1C; }
.btn-cizgi { background: transparent; color: var(--beyaz); border: 1px solid #4A6878; }
.btn-cizgi:hover { border-color: var(--beyaz); color: var(--beyaz); }
.butonlar { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.yazi-link { font-weight: 700; color: var(--koyu); }

/* Karşılama */
.karsilama { display: flex; flex-wrap: wrap; align-items: center; gap: 56px; padding-top: 64px; padding-bottom: 88px; }
.karsilama .yazi { flex: 1 1 520px; min-width: 0; display: flex; flex-direction: column; gap: 26px; }
.formul { font-family: var(--baslik); font-weight: 800; font-size: 15px; color: var(--kiremit); letter-spacing: 0.05em; }
.karsilama h1 { font-size: 62px; line-height: 1.04; }
.vurgu { position: relative; display: inline-block; }
.vurgu svg { position: absolute; left: 0; bottom: -10px; width: 100%; height: 18px; }
.karsilama .yazi > p { font-size: 19px; line-height: 1.65; color: var(--metin); max-width: 540px; }
.polaroid-kap { flex: 0 1 380px; min-width: 0; display: flex; justify-content: center; padding: 16px 0; }
.polaroid { width: 340px; max-width: 100%; background: var(--beyaz); padding: 14px 14px 18px; box-shadow: 0 10px 30px rgba(31,58,72,0.12); transform: rotate(2.5deg); position: relative; display: flex; flex-direction: column; gap: 10px; }
.polaroid .bant { position: absolute; top: -14px; left: 50%; margin-left: -46px; width: 92px; height: 26px; background: rgba(229,174,169,0.75); transform: rotate(-3deg); }
.polaroid .resim { aspect-ratio: 843 / 696; background: var(--lavanta-acik); overflow: hidden; }
.polaroid .resim img { width: 100%; height: 100%; }
.polaroid b { font-family: var(--baslik); font-size: 18px; text-align: center; }
.polaroid span { font-size: 14px; text-align: center; color: var(--metin); margin-top: -6px; }
@media (max-width: 600px) {
  .karsilama { padding-top: 40px; padding-bottom: 56px; gap: 40px; }
  .karsilama h1 { font-size: 46px; }
}

/* Numaralı bölümler */
.bolum { border-top: 2px solid var(--koyu); padding: 44px 0 56px; display: flex; flex-wrap: wrap; gap: 28px 40px; }
.bolum .sol { flex: 0 1 260px; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.bolum .no { font-family: var(--baslik); font-weight: 800; font-size: 44px; color: var(--lavanta); line-height: 1; }
.bolum .sol h2 { font-size: 28px; }
.bolum .sag { flex: 1 1 520px; min-width: 0; display: flex; flex-direction: column; gap: 16px; }
.bolum .sag.kartlar { display: grid; }
.bolum .sag.not-izgara { flex-direction: row; flex-wrap: wrap; gap: 20px; }
.duz-metin p { font-size: 18px; line-height: 1.75; color: var(--metin); }
.ciplar { display: flex; flex-wrap: wrap; gap: 10px; }
.ciplar span { background: var(--beyaz); border: 1.5px solid var(--koyu); font-weight: 700; font-size: 14px; padding: 7px 13px; border-radius: 999px; }

.adimlar { list-style: none; margin: 0; padding: 0; }
.adimlar li { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px dashed var(--kesik); }
.adimlar li:last-child { border-bottom: 0; }
.adimlar .sira { font-family: var(--baslik); font-weight: 800; font-size: 22px; color: var(--kiremit); width: 32px; flex: none; }
.adimlar b { font-size: 19px; }
.adimlar span span { color: var(--metin); }

.kartlar { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 600px) { .kartlar { grid-template-columns: minmax(0, 1fr); } }
.dkart { background: var(--beyaz); border: 1.5px solid var(--koyu); border-radius: 4px; padding: 20px; }
.dkart h3 { font-size: 20px; }
.dkart p { margin-top: 6px; color: var(--metin); font-size: 15px; line-height: 1.55; }
.g-lav { box-shadow: 4px 4px 0 var(--lavanta-acik); }
.g-pem { box-shadow: 4px 4px 0 var(--pembe-acik); }
.g-ada { box-shadow: 4px 4px 0 var(--adacayi-acik); }
.g-mav { box-shadow: 4px 4px 0 var(--mavi-acik); }

/* Notlar */
.not-izgara { display: flex; flex-wrap: wrap; gap: 20px; }
.not-kart { flex: 1 1 280px; min-width: 0; background: var(--beyaz); border: 1.5px solid var(--koyu); border-radius: 4px; overflow: hidden; display: flex; flex-direction: column; box-shadow: 4px 4px 0 var(--lavanta-acik); }
.not-kart img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; object-position: top; border-bottom: 1.5px solid var(--koyu); }
.not-kart .ic { padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; }
.not-kart h3 { font-size: 19px; }
.not-kart p { font-size: 15px; color: var(--metin); }
.not-kart .butonlar { gap: 10px; }
.not-kart .btn { padding: 10px 16px; min-height: 44px; border-radius: 10px; }
.linkler { flex: 1 1 220px; min-width: 0; display: flex; flex-direction: column; gap: 12px; }
.lkart { text-decoration: none; color: var(--koyu); background: var(--beyaz); border: 1.5px solid var(--koyu); border-radius: 4px; padding: 16px 18px; font-weight: 700; display: flex; flex-direction: column; gap: 2px; }
.lkart small { font-weight: 400; color: var(--metin); font-size: 14px; }
.lkart:hover { background: var(--lavanta-acik); color: var(--koyu); }
.lkart.kesikli { border-style: dashed; border-color: var(--kesik); background: transparent; font-weight: 700; color: var(--metin); }

/* Öğrenci bandı */
.ogrenci-bant { border-top: 2px solid var(--koyu); padding: 36px 0 64px; }
.ogrenci-bant > div { border: 2px dashed var(--koyu); border-radius: 6px; background: var(--beyaz); padding: 28px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.ogrenci-bant h2 { font-size: 26px; }
.ogrenci-bant p { color: var(--metin); margin-top: 6px; }

/* İletişim + alt bilgi */
.iletisim { background: var(--koyu); color: var(--beyaz); }
.iletisim .ust-kisim { padding-top: 64px; padding-bottom: 64px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.iletisim h2 { font-size: 40px; line-height: 1.15; color: var(--beyaz); }
.iletisim p { color: #C9D6DD; margin-top: 10px; font-size: 17px; }
.alt { border-top: 1px solid #2F5163; }
.alt .kap { padding-top: 22px; padding-bottom: 22px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; font-size: 14px; color: #A9BCC6; }
.alt .sol, .alt .sag { display: flex; align-items: center; gap: 10px; }
.alt .sol { flex-wrap: wrap; column-gap: 14px; }
.alt .sol a { color: #A9BCC6; }
.alt .sol a:hover { color: var(--beyaz); }
.alt .sag a { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #C9D6DD; }
.alt .sag a:hover { color: var(--beyaz); background: rgba(255,255,255,0.06); }
@media (max-width: 600px) { .iletisim h2 { font-size: 32px; } }

/* Metin sayfası (KVKK) */
.metin { max-width: 760px; padding-top: 48px; padding-bottom: 72px; display: flex; flex-direction: column; gap: 14px; }
.metin h1 { font-size: 34px; }
.metin h2 { font-size: 21px; margin-top: 18px; }
.metin p, .metin li { font-size: 16px; line-height: 1.7; color: var(--metin); }
.metin ul { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 8px; }
.metin strong { color: var(--koyu); }
.metin .tarih { font-size: 14px; color: var(--soluk); }
.alt-basit { border-top: 1px solid var(--cizgi); padding: 20px 24px; text-align: center; font-size: 14px; color: var(--soluk); background: var(--zemin); }

/* Basit sayfa (öğrenci girişi) */
.basit { min-height: 100vh; display: flex; flex-direction: column; }
.basit main { flex: 1; display: flex; align-items: center; justify-content: center; padding: 56px 20px; }
.basit .kutu { max-width: 480px; width: 100%; background: var(--beyaz); border: 1.5px solid var(--koyu); border-radius: 6px; box-shadow: 6px 6px 0 var(--lavanta-acik); padding: 36px 28px; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 14px; }
.basit .kutu h1 { font-size: 30px; }
.basit .kutu p { font-size: 16px; line-height: 1.6; color: var(--metin); }
.basit footer { border-top: 1px solid var(--cizgi); padding: 20px 24px; text-align: center; font-size: 14px; color: var(--soluk); background: var(--zemin); }