@layer sifirla, taban, duzen, bilesen, yardimci;

@layer sifirla {
  *, *::before, *::after { box-sizing: border-box; }
  body { margin: 0; }
  img, svg { display: block; max-width: 100%; }
  h1, h2, h3, p, ul, ol, dl { margin-block: 0; }
}

@layer taban {
  :root {
    --lacivert: #0c4a6e;
    --lacivert-koyu: #082f49;
    --buz: #e0f2fe;
    --buz-koyu: #bae6fd;
    --metin: #0f172a;
    --metin-soluk: #475569;
    --cizgi: #cbd5e1;
    --beyaz: #ffffff;
    --kap-genislik: 1140px;
  }

  html { font-size: 16px; -webkit-text-size-adjust: 100%; }

  body {
    font-family: "Work Sans", "Segoe UI", Tahoma, sans-serif;
    color: var(--metin);
    background: var(--beyaz);
    line-height: 1.65;

    & a { color: var(--lacivert); }
    & a:hover { color: var(--lacivert-koyu); }
  }

  :is(a, button, input, textarea, [tabindex]):focus-visible {
    outline: 3px solid var(--lacivert);
    outline-offset: 2px;
  }

  h1 { font-size: clamp(1.9rem, 1.2rem + 2.4vw, 3rem); line-height: 1.15; font-weight: 700; letter-spacing: -.02em; }
  h2 { font-size: 1.55rem; font-weight: 600; line-height: 1.25; }
  h3 { font-size: 1.15rem; font-weight: 600; }
}

@layer duzen {
  .kap { width: min(100% - 2.5rem, var(--kap-genislik)); margin-inline: auto; }

  .atla {
    position: absolute; top: 0; left: 0; transform: translateY(-120%);
    background: var(--lacivert); color: var(--beyaz); padding: .6rem 1rem; z-index: 99;
    &:focus { transform: none; }
  }

  .ust {
    border-bottom: 1px solid var(--cizgi);
    background: var(--beyaz);
    position: sticky; top: 0; z-index: 20;

    & .ust-bant {
      background: var(--lacivert-koyu); color: var(--buz); font-size: .8rem;
      & .ust-bant-ic { display: flex; justify-content: space-between; gap: 1rem; padding-block: .35rem; }
      & a { color: var(--buz); text-decoration: none; }
    }

    & .ust-govde {
      display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1.5rem;
      min-height: 72px;
    }

    & .marka {
      display: inline-flex; align-items: center; gap: .55rem; font-weight: 700; font-size: 1.15rem;
      text-decoration: none; color: var(--lacivert);
    }

    & .menu-anahtar { position: absolute; opacity: 0; width: 0; height: 0; }

    & .menu-dugme {
      display: none; grid-column: 3; width: 42px; height: 42px; border: 1px solid var(--cizgi); border-radius: 4px;
      flex-direction: column; justify-content: center; gap: 5px; padding: 0 9px; cursor: pointer;
      & span { display: block; height: 2px; background: var(--lacivert); }
    }

    & .menu {
      grid-column: 2 / 4; justify-self: end; display: flex; gap: .25rem; align-items: center;
      & a {
        text-decoration: none; padding: .5rem .8rem; font-weight: 500; font-size: .95rem; border-bottom: 2px solid transparent;
        &[aria-current="page"] { border-bottom-color: var(--lacivert); }
        &:hover { background: var(--buz); }
      }
      & .menu-cta {
        background: var(--lacivert); color: var(--beyaz); margin-left: .6rem; border-radius: 4px;
        &:hover { background: var(--lacivert-koyu); }
      }
    }
  }

  .bolum { padding-block: 3.5rem; }
  .bolum-acik { background: var(--buz); }
  .bolum-baslik { text-align: center; margin-bottom: 2rem; color: var(--lacivert-koyu); }
  .izgara-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
  .yazi-dar { max-width: 820px; }
  .izgara-iletisim { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }

  .alt {
    background: var(--lacivert-koyu); color: var(--buz-koyu); margin-top: 2rem;
    & .alt-izgara { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 2rem; padding-block: 3rem; }
    & .alt-baslik { color: var(--beyaz); font-size: 1rem; text-transform: uppercase; letter-spacing: .08em; margin-bottom: .8rem; }
    & ul { list-style: none; padding: 0; display: grid; gap: .4rem; }
    & a { color: var(--buz); text-decoration: none; &:hover { text-decoration: underline; } }
    & .alt-cizgi { border-top: 1px solid rgba(255, 255, 255, .15); font-size: .8rem; padding-block: 1rem; }
  }
}

@layer bilesen {
  .kahraman {
    background: linear-gradient(135deg, var(--lacivert-koyu), var(--lacivert));
    color: var(--beyaz);
    & .kahraman-ic { display: grid; grid-template-columns: 1.15fr .85fr; gap: 3rem; align-items: center; padding-block: 4.5rem; }
    & .kahraman-etiket { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; color: var(--buz-koyu); margin-bottom: .8rem; }
    & h1 { color: var(--beyaz); margin-bottom: 1rem; }
    & .kahraman-slogan { font-size: 1.15rem; color: var(--buz); margin-bottom: 1.8rem; }
    & .kahraman-dugmeler { display: flex; gap: .8rem; flex-wrap: wrap; }
    & .kahraman-panel {
      background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .2); border-radius: 6px; padding: 1.4rem;
      display: grid; gap: .8rem; backdrop-filter: blur(4px);
      & .panel-satir { display: flex; justify-content: space-between; border-bottom: 1px dashed rgba(255, 255, 255, .25); padding-bottom: .5rem; font-size: .95rem; }
      & .panel-yesil { color: #86efac; }
      & .panel-kod { letter-spacing: .3em; font-size: 1.3rem; }
      & .panel-grafik { width: 100%; height: 50px; }
      & .panel-gorsel {
        width: 100%; max-width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover;
        border-radius: 4px; border: 1px solid rgba(255, 255, 255, .25); margin-bottom: .4rem;
      }
    }
  }

  .dugme {
    display: inline-block; padding: .75rem 1.5rem; border-radius: 4px; font-weight: 600; text-decoration: none;
    border: 2px solid transparent; font: inherit; font-weight: 600; cursor: pointer; line-height: 1.2;
  }
  .dugme-acik { background: var(--buz); color: var(--lacivert-koyu); &:hover { background: var(--beyaz); color: var(--lacivert-koyu); } }
  .dugme-cerceve { border-color: var(--buz); color: var(--beyaz); &:hover { background: rgba(255, 255, 255, .1); color: var(--beyaz); } }
  .dugme-koyu { background: var(--lacivert); color: var(--beyaz); &:hover { background: var(--lacivert-koyu); color: var(--beyaz); } }

  .kutu {
    background: var(--beyaz); border: 1px solid var(--cizgi); border-top: 4px solid var(--lacivert); padding: 1.8rem;
    & h3 { margin: .8rem 0 .5rem; }
    & p { color: var(--metin-soluk); }
    & .kutu-ok { display: inline-block; margin-top: 1rem; font-weight: 600; }
  }
  .kutu-baglanti { text-decoration: none; color: inherit; transition: box-shadow .2s; &:hover { box-shadow: 0 10px 30px rgba(12, 74, 110, .15); color: inherit; } }

  .sss-on {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem;
    & .sss-on-oge { border: 1px solid var(--cizgi); padding: 1.2rem 1.4rem; border-left: 4px solid var(--lacivert); }
    & dt { font-weight: 600; margin-bottom: .4rem; }
    & dd { margin: 0; color: var(--metin-soluk); }
  }
  .ortala { text-align: center; margin-top: 2rem; }

  .cagri {
    background: var(--lacivert); color: var(--beyaz);
    & .cagri-ic { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; padding-block: 2.5rem; flex-wrap: wrap; }
    & p { font-size: 1.1rem; max-width: 640px; }
  }

  .serit {
    background: var(--buz); border-bottom: 1px solid var(--buz-koyu);
    & .kap { padding-block: 2.2rem; }
    & h1 { color: var(--lacivert-koyu); }

    /* H1 arkasında overlay'li görsel bandı */
    &.serit-gorselli {
      position: relative; isolation: isolate; overflow: hidden; min-height: 260px;
      display: grid; align-items: end;
      & .serit-gorsel {
        position: absolute; inset: 0; width: 100%; height: 100%; max-width: 100%;
        object-fit: cover; object-position: center; z-index: -2;
      }
      &::before {
        content: ""; position: absolute; inset: 0; z-index: -1;
        background: linear-gradient(180deg, rgba(8, 47, 73, .55), rgba(8, 47, 73, .88));
      }
      & .serit-ic { padding-block: 3.2rem 2.4rem; }
      & h1 { color: var(--beyaz); text-shadow: 0 2px 12px rgba(0, 0, 0, .35); }
      & .yol { color: var(--buz); & a { color: var(--buz); } }
    }
  }
  .yol {
    list-style: none; padding: 0; display: flex; gap: .5rem; font-size: .85rem; color: var(--metin-soluk); margin-bottom: .6rem;
    & li + li::before { content: "›"; margin-right: .5rem; }
    & a { text-decoration: none; }
  }

  .yazi {
    & h2 { margin: 2rem 0 .7rem; color: var(--lacivert-koyu); padding-bottom: .3rem; border-bottom: 2px solid var(--buz-koyu); }
    & h3 { margin: 1.5rem 0 .5rem; }
    & p { margin-bottom: 1rem; }
    & ul, & ol { margin: 0 0 1rem; padding-left: 1.5rem; }
    & li { margin-bottom: .3rem; }
    & table { border-collapse: collapse; width: 100%; margin-bottom: 1.2rem; }
    & th, & td { border: 1px solid var(--cizgi); padding: .55rem .75rem; text-align: left; }
    & th { background: var(--buz); }
  }
  .ic-cagri {
    margin-top: 2.5rem; padding: 1.5rem; background: var(--buz); border: 1px solid var(--buz-koyu);
    display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
  }

  .akordeon {
    margin-top: 1.5rem; border: 1px solid var(--cizgi);
    & .akordeon-oge { border-bottom: 1px solid var(--cizgi); &:last-child { border-bottom: 0; } }
    & .akordeon-anahtar { position: absolute; opacity: 0; pointer-events: none; }
    & .akordeon-baslik {
      display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem 1.2rem;
      font-weight: 600; cursor: pointer; user-select: none;
      &::after { content: "+"; font-size: 1.3rem; color: var(--lacivert); }
      &:hover { background: var(--buz); }
    }
    & .akordeon-anahtar:focus-visible + .akordeon-baslik { outline: 3px solid var(--lacivert); outline-offset: -3px; }
    & .akordeon-icerik {
      display: grid; grid-template-rows: 0fr; transition: grid-template-rows .25s ease;
      & > div { overflow: hidden; padding-inline: 1.2rem; color: var(--metin-soluk); }
    }
    & .akordeon-anahtar:checked ~ .akordeon-baslik { background: var(--buz); &::after { content: "−"; } }
    & .akordeon-anahtar:checked ~ .akordeon-icerik { grid-template-rows: 1fr; & > div { padding-bottom: 1.1rem; } }
  }

  .kanallar {
    list-style: none; padding: 0; margin-top: 1.5rem; display: grid; gap: .6rem;
    & li { display: grid; grid-template-columns: 110px 1fr; border: 1px solid var(--cizgi); padding: .7rem 1rem; }
    & span { font-weight: 600; color: var(--metin-soluk); }
  }
  .form-kart {
    background: var(--buz); border: 1px solid var(--buz-koyu); padding: 2rem;
    & h2 { margin-bottom: 1.2rem; color: var(--lacivert-koyu); }
    & .alan { margin-bottom: 1rem; }
    & label { display: block; font-weight: 600; margin-bottom: .3rem; font-size: .92rem; }
    & input, & textarea { width: 100%; padding: .7rem .8rem; border: 1px solid var(--cizgi); border-radius: 4px; font: inherit; background: var(--beyaz); }
    & textarea { resize: vertical; }
    & .gizli-alan { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }
  }
  /* ---- günlük (blog) ---- */
  .serit-aciklama { color: var(--metin-soluk); max-width: 62ch; margin-top: .6rem; }
  .makale-kunye {
    display: flex; gap: .6rem; flex-wrap: wrap; margin-top: .6rem; font-size: .9rem; color: var(--metin-soluk);
    & time { font-weight: 600; color: var(--lacivert); }
  }

  .gunluk {
    & .gunluk-bos { border: 1px dashed var(--cizgi); padding: 2rem; text-align: center; color: var(--metin-soluk); }
    & .gunluk-liste { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; border-top: 1px solid var(--cizgi); }
    & .gunluk-satir {
      display: grid; grid-template-columns: 280px 1fr; gap: 1.6rem; padding-block: 1.6rem; border-bottom: 1px solid var(--cizgi);
      &:has(> .gunluk-metin:only-child) { grid-template-columns: 1fr; }
    }
    & .gunluk-gorsel img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border: 1px solid var(--cizgi); }
    & .gunluk-tarih { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--metin-soluk); margin-bottom: .35rem; }
    & .gunluk-baslik {
      font-size: 1.35rem; margin-bottom: .5rem;
      & a { text-decoration: none; color: var(--lacivert-koyu); &:hover { text-decoration: underline; } }
    }
    & .gunluk-ozet { color: var(--metin-soluk); margin-bottom: .7rem; }
    & .gunluk-devam { font-weight: 600; text-decoration: none; }
  }
  .sayfalama {
    display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 2rem; flex-wrap: wrap;
    & .sayfalama-durum { font-weight: 600; color: var(--metin-soluk); }
    & .sayfalama-pasif { color: var(--cizgi); font-weight: 600; padding: .75rem 1.5rem; }
  }

  .makale {
    max-width: 860px;
    & .makale-kapak { margin: 0 0 2rem; & img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border: 1px solid var(--cizgi); } }
    & .makale-govde a { font-weight: 600; }
  }
  .komsu {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 2.5rem; border-top: 2px solid var(--lacivert); padding-top: 1.2rem;
    & .komsu-oge { display: grid; gap: .2rem; text-decoration: none; padding: 1rem 1.2rem; border: 1px solid var(--cizgi); color: var(--lacivert-koyu); font-weight: 600; &:hover { background: var(--buz); } }
    & small { text-transform: uppercase; letter-spacing: .08em; font-size: .72rem; color: var(--metin-soluk); font-weight: 500; }
    & .komsu-sonraki { text-align: right; }
    & .komsu-bos { border: 0; }
  }
  .benzer {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem;
    & .benzer-kart { display: grid; align-content: start; gap: .3rem; & time { font-size: .8rem; color: var(--metin-soluk); } & h3 { margin: 0; font-size: 1.05rem; } }
  }

  .secki {
    margin-top: 2.5rem; border: 1px solid var(--cizgi); border-left: 4px solid var(--lacivert); padding: 1.4rem 1.6rem; background: var(--beyaz);
    & h2 { font-size: 1.15rem; margin-bottom: .8rem; color: var(--lacivert-koyu); }
    & .secki-liste { list-style: none; padding: 0; margin: 0 0 .9rem; display: grid; gap: .55rem; }
    & li { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; border-bottom: 1px dashed var(--cizgi); padding-bottom: .45rem; }
    & li a { font-weight: 600; text-decoration: none; &:hover { text-decoration: underline; } }
    & time { font-size: .8rem; color: var(--metin-soluk); white-space: nowrap; }
    & .secki-tumu { font-weight: 600; text-decoration: none; font-size: .95rem; }
  }

  .notlar {
    & .notlar-ust { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 1.4rem; border-bottom: 2px solid var(--lacivert); padding-bottom: .6rem; & h2 { color: var(--lacivert-koyu); } & a { font-weight: 600; text-decoration: none; } }
    & .notlar-izgara { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
    & .notlar-kart {
      border: 1px solid var(--cizgi); padding: 1.3rem 1.4rem; display: grid; gap: .4rem; align-content: start;
      & time { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--metin-soluk); }
      & h3 { font-size: 1.1rem; & a { text-decoration: none; color: var(--lacivert-koyu); &:hover { text-decoration: underline; } } }
      & p { color: var(--metin-soluk); font-size: .95rem; }
    }
  }

  .uyari { padding: .8rem 1rem; margin-bottom: 1rem; border-radius: 4px; font-weight: 500; }
  .uyari-basari { background: #dcfce7; color: #14532d; border: 1px solid #86efac; }
  .uyari-hata { background: #fee2e2; color: #7f1d1d; border: 1px solid #fca5a5; }
}

@layer yardimci {
  @media (max-width: 900px) {
    .kahraman .kahraman-ic { grid-template-columns: 1fr; padding-block: 3rem; }
    .alt .alt-izgara { grid-template-columns: 1fr 1fr; }
    .izgara-iletisim, .sss-on { grid-template-columns: 1fr; }
    .benzer { grid-template-columns: 1fr 1fr; }
    .notlar .notlar-izgara { grid-template-columns: 1fr; }
  }
  @media (max-width: 720px) {
    .serit.serit-gorselli { min-height: 200px; & .serit-ic { padding-block: 2.2rem 1.6rem; } }
    .ust .ust-bant-ic { flex-direction: column; gap: .1rem; align-items: center; text-align: center; }
    .ust .ust-govde { grid-template-columns: 1fr auto; }
    .ust .menu-dugme { display: flex; grid-column: 2; }
    .ust .menu {
      display: none; grid-column: 1 / -1; flex-direction: column; align-items: stretch; padding-bottom: 1rem;
      & a { padding: .8rem .5rem; border-bottom: 1px solid var(--cizgi); }
      & .menu-cta { margin: .6rem 0 0; text-align: center; }
    }
    .ust .menu-anahtar:checked ~ .menu { display: flex; }
    .alt .alt-izgara { grid-template-columns: 1fr; gap: 1.5rem; }
    .cagri .cagri-ic { flex-direction: column; text-align: center; }
    .gunluk .gunluk-satir { grid-template-columns: 1fr; gap: .9rem; }
    .komsu { grid-template-columns: 1fr; & .komsu-sonraki { text-align: left; } }
    .benzer { grid-template-columns: 1fr; }
    .secki li { flex-direction: column; gap: .15rem; }
  }
}