/* Sonsuz Çöküş — site biçemi (Claude, 26.10.2026). Renk dili kitabın kendisinden: sarı faz / mavi faz. */
:root {
  --zemin: #f5f6fb; --zemin-2: #ffffff; --zemin-3: #e9ecf6; --cizgi: #cfd4e6;
  --murekkep: #16182b; --murekkep-2: #4a4f68; --murekkep-3: #7a8098;
  --mavi: #2f5fe0; --mavi-acik: #dfe7ff; --sari: #b8860b; --sari-acik: #fff1c7;
  --yesil: #1f8f6f; --mor: #7a4fd0; --kirmizi: #c0392b; --gri: #6b7085;
  --okuma: 72ch; --koseli: 6px;
  --serif: Georgia, "Times New Roman", "Noto Serif", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --zemin: #0f1122; --zemin-2: #161a30; --zemin-3: #1f2440; --cizgi: #2d3356;
    --murekkep: #e9ebf5; --murekkep-2: #b3b8d0; --murekkep-3: #7d8399;
    --mavi: #6f94ff; --mavi-acik: #1c2a5c; --sari: #e8b84a; --sari-acik: #3d3012;
    --yesil: #3dcf9f; --mor: #b08cff; --kirmizi: #ff7b6b; --gri: #8e94ad;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--zemin); color: var(--murekkep); font-family: var(--sans); line-height: 1.55; font-size: 16px; }
a { color: var(--mavi); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--sari); outline-offset: 2px; }
img, svg { max-width: 100%; height: auto; }
code, pre { font-family: var(--mono); font-size: 0.92em; }
pre { white-space: pre-wrap; word-break: break-word; }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; margin: 1.6em 0 0.5em; }
h1 { font-size: clamp(1.7rem, 2.6vw + 1rem, 2.5rem); margin-top: 0.4em; }
h2 { font-size: clamp(1.25rem, 1vw + 1rem, 1.6rem); }
h3 { font-size: 1.15rem; }
.atla { position: absolute; left: -999px; top: 0; background: var(--sari); color: #000; padding: 0.5rem 1rem; z-index: 100; }
.atla:focus { left: 0.5rem; top: 0.5rem; }
.gizli { position: absolute; left: -9999px; }

/* üst çubuk */
.ust { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 1rem; padding: 0.55rem 1rem;
  background: color-mix(in srgb, var(--zemin) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--cizgi); }
.marka { display: flex; align-items: baseline; gap: 0.55rem; text-decoration: none; color: var(--murekkep); flex-wrap: wrap; }
.marka-isaret { display: inline-block; width: 14px; height: 14px; border-radius: 50%; align-self: center;
  background: radial-gradient(circle at 35% 35%, var(--sari) 0 30%, var(--mavi) 31% 100%); box-shadow: 0 0 0 3px var(--zemin-3); }
.marka-ad { font-family: var(--serif); font-weight: 700; font-size: 1.15rem; }
.marka-alt { color: var(--murekkep-3); font-size: 0.85rem; }
.menu-dugme { margin-left: auto; background: var(--zemin-2); border: 1px solid var(--cizgi); color: var(--murekkep); padding: 0.4rem 0.8rem; border-radius: var(--koseli); font: inherit; cursor: pointer; }
.ana-menu ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.1rem 0.2rem; }
.ana-menu a { display: block; padding: 0.3rem 0.55rem; border-radius: var(--koseli); color: var(--murekkep-2); text-decoration: none; font-size: 0.92rem; }
.ana-menu a:hover, .ana-menu a[aria-current="page"] { background: var(--zemin-3); color: var(--murekkep); }
@media (max-width: 900px) {
  .ana-menu { display: none; width: 100%; }
  .ana-menu.acik { display: block; }
  .ana-menu ul { flex-direction: column; }
  .ust { flex-wrap: wrap; }
}
@media (min-width: 901px) { .menu-dugme { display: none; } .ana-menu { margin-left: auto; } }

/* sayfa düzeni */
.sayfa { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem; max-width: 1200px; margin: 0 auto; padding: 1rem 1rem 3rem; }
.okuma .sayfa { grid-template-columns: 280px minmax(0, 1fr); }
@media (max-width: 900px) { .okuma .sayfa { grid-template-columns: minmax(0, 1fr); } .yan { order: 2; } }
.govde { min-width: 0; }
.metin, .bolum { max-width: var(--okuma); }
.metin p, .metin li { font-family: var(--serif); font-size: 1.06rem; line-height: 1.65; }
.metin p { margin: 0 0 1em; }
.giris { font-size: 1.08rem; color: var(--murekkep-2); max-width: var(--okuma); }
.kucuk { font-size: 0.85rem; color: var(--murekkep-3); }
.ozet { font-family: var(--serif); font-style: italic; color: var(--murekkep-2); border-left: 3px solid var(--sari); padding-left: 0.8rem; }
.bos { color: var(--murekkep-3); font-style: italic; background: var(--zemin-3); padding: 0.6rem 0.9rem; border-radius: var(--koseli); }
.herkes { background: var(--sari-acik); border-radius: var(--koseli); padding: 0.5rem 0.8rem; display: inline-block; }
.ornek { color: var(--murekkep-2); font-style: italic; }
.kirinti { font-size: 0.85rem; color: var(--murekkep-3); margin-bottom: 0.5rem; }
.kirinti a { color: var(--murekkep-2); }
.bolum-bas { border-bottom: 1px solid var(--cizgi); padding-bottom: 0.8rem; margin-bottom: 1.2rem; }
.ust-satir { display: flex; flex-wrap: wrap; gap: 0.5rem 0.8rem; align-items: center; margin: 0 0 0.4rem; font-size: 0.85rem; }
.durum { padding: 0.1rem 0.5rem; border-radius: 999px; background: var(--zemin-3); color: var(--murekkep-2); }
.durum-tamamlandi { background: color-mix(in srgb, var(--yesil) 20%, transparent); color: var(--yesil); }
.durum-duzenlendi, .durum-yeniden { background: var(--sari-acik); color: var(--sari); }
.sayfa-ici { background: var(--zemin-2); border: 1px solid var(--cizgi); border-radius: var(--koseli); padding: 0.4rem 0.8rem; margin-bottom: 1rem; font-size: 0.92rem; }
.sayfa-ici summary { cursor: pointer; color: var(--murekkep-2); }
.sayfa-ici ul { padding-left: 1.2rem; }
.gez { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--cizgi); max-width: var(--okuma); font-size: 0.92rem; }
.gez-sonraki { text-align: right; margin-left: auto; }

/* katman rozetleri ve etiketler */
.katmanlar { display: inline-flex; gap: 2px; vertical-align: middle; }
.katman { display: inline-block; width: 1.25rem; height: 1.25rem; line-height: 1.25rem; text-align: center; font-size: 0.7rem; font-weight: 700; border-radius: 3px; font-family: var(--sans); }
.katman.var { background: var(--mavi); color: #fff; }
.katman.yok { background: var(--zemin-3); color: var(--murekkep-3); }
.etiket { display: inline-block; font-family: var(--sans); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.02em; padding: 0.08rem 0.42rem; border-radius: 3px; vertical-align: 0.15em; margin: 0 0.1rem; border: 1px solid transparent; }
.etiket-mat { background: color-mix(in srgb, var(--yesil) 18%, transparent); color: var(--yesil); border-color: color-mix(in srgb, var(--yesil) 40%, transparent); }
.etiket-kesin, .etiket-turev { background: var(--mavi-acik); color: var(--mavi); }
.etiket-aday { background: var(--sari-acik); color: var(--sari); }
.etiket-ongoru { background: color-mix(in srgb, var(--mor) 18%, transparent); color: var(--mor); }
.etiket-tutarli, .etiket-saglama { background: var(--zemin-3); color: var(--murekkep-2); }
.etiket-acik, .etiket-spekulatif, .etiket-genel { background: transparent; color: var(--gri); border-color: var(--cizgi); }
.etiket-listesi { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0.3rem 1rem; }

/* kitap içindekiler */
.toc details { margin-bottom: 0.35rem; }
.toc summary { cursor: pointer; font-family: var(--serif); font-weight: 600; padding: 0.3rem 0; }
.toc ul { list-style: none; padding-left: 0.6rem; margin: 0.2rem 0 0.6rem; border-left: 2px solid var(--cizgi); }
.toc li { font-size: 0.9rem; padding: 0.18rem 0 0.18rem 0.5rem; display: flex; justify-content: space-between; gap: 0.4rem; align-items: start; }
.toc li a { color: var(--murekkep-2); text-decoration: none; flex: 1; }
.toc li a:hover, .toc li a[aria-current="page"] { color: var(--murekkep); text-decoration: underline; }
.toc li a[aria-current="page"] { font-weight: 600; }
.toc-kisim > a { font-weight: 600; color: var(--murekkep); }
.toc .katmanlar { transform: scale(0.8); transform-origin: right top; }
.yan .toc { position: sticky; top: 4rem; max-height: calc(100vh - 5rem); overflow: auto; padding-right: 0.4rem; }

/* şekil, tablo, denklem */
figure.sekil { margin: 1.5rem 0; }
figure.sekil img { border-radius: var(--koseli); border: 1px solid var(--cizgi); background: #fff; }
figcaption { font-size: 0.88rem; color: var(--murekkep-2); margin-top: 0.4rem; font-family: var(--sans); }
.tablo-kaydir { overflow-x: auto; margin: 1rem 0; border: 1px solid var(--cizgi); border-radius: var(--koseli); }
table { border-collapse: collapse; width: 100%; font-size: 0.88rem; font-family: var(--sans); }
th, td { padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--cizgi); text-align: left; vertical-align: top; }
th { background: var(--zemin-3); position: sticky; top: 0; }
tr:nth-child(even) td { background: color-mix(in srgb, var(--zemin-3) 45%, transparent); }
.veri table td { white-space: nowrap; font-family: var(--mono); font-size: 0.8rem; }
.denklem-blok { overflow-x: auto; padding: 0.6rem 0.8rem; margin: 0.8rem 0; background: var(--zemin-2); border: 1px solid var(--cizgi); border-radius: var(--koseli); font-size: 1.05rem; }
.denklem { border-top: 1px solid var(--cizgi); padding: 1rem 0; max-width: var(--okuma); }
.denklem h3 { margin-top: 0; }
.ascii { background: var(--zemin-3); padding: 0.5rem 0.8rem; border-radius: var(--koseli); font-size: 0.88rem; }
.ilgili-denklem code { background: var(--zemin-3); padding: 0.05rem 0.3rem; border-radius: 3px; }

/* galeri ve grafikler */
.galeri { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.sekil-kart { margin: 0; background: var(--zemin-2); border: 1px solid var(--cizgi); border-radius: var(--koseli); padding: 0.5rem; }
.sekil-kart img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 4px; background: #fff; }
figure.grafik { margin: 0 0 2rem; max-width: 820px; background: var(--zemin-2); border: 1px solid var(--cizgi); border-radius: var(--koseli); padding: 0.8rem; }
figure.grafik img { width: 100%; background: #fff; border-radius: 4px; padding: 0.3rem; }
.grafik figcaption .herkes { display: inline-block; margin-top: 0.4rem; }

/* ana sayfa */
.kahraman { padding: 2rem 0 1.5rem; }
.kahraman-ust { font-family: var(--serif); font-style: italic; color: var(--sari); margin: 0; font-size: 1.1rem; }
.kahraman h1 { font-size: clamp(2.4rem, 5vw + 1rem, 4.2rem); margin: 0.1em 0 0.3em; letter-spacing: -0.02em; }
.kahraman-metin { max-width: 62ch; font-size: 1.12rem; color: var(--murekkep-2); }
.akis { list-style: none; padding: 0; margin: 1.6rem 0; display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: stretch; }
.akis li { position: relative; flex: 1 1 150px; }
.akis a, .akis li > span { display: flex; flex-direction: column; gap: 0.2rem; height: 100%; text-decoration: none; color: var(--murekkep); background: var(--zemin-2); border: 1px solid var(--cizgi); border-radius: var(--koseli); padding: 0.7rem 0.8rem; transition: border-color 0.15s; }
.akis a:hover { border-color: var(--sari); }
.akis li + li::before { content: "→"; position: absolute; left: -0.65rem; top: 50%; transform: translateY(-50%); color: var(--sari); font-size: 0.9rem; }
@media (max-width: 700px) { .akis li + li::before { display: none; } .akis { gap: 0.4rem; } }
.akis-sembol { font-family: var(--serif); font-size: 1.45rem; font-weight: 700; color: var(--mavi); }
.akis-ad { font-size: 0.82rem; color: var(--murekkep-3); }
.dugme { display: inline-block; background: var(--mavi); color: #fff; padding: 0.55rem 1rem; border-radius: var(--koseli); text-decoration: none; font-weight: 600; }
.dugme.ikincil { background: var(--zemin-3); color: var(--murekkep); }
.sozlesme { background: var(--zemin-2); border: 1px solid var(--cizgi); border-left: 4px solid var(--sari); border-radius: var(--koseli); padding: 1rem 1.2rem; margin: 1rem 0 2rem; }
.sozlesme h2 { margin-top: 0; }
.uclu { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.uclu h2 { margin-top: 0; }
.liste { list-style: none; padding: 0; }
.liste li { padding: 0.45rem 0; border-bottom: 1px solid var(--cizgi); }
.istatistik { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 0.6rem; margin: 0.6rem 0 1rem; }
.istatistik div { background: var(--zemin-2); border: 1px solid var(--cizgi); border-radius: var(--koseli); padding: 0.6rem 0.7rem; display: flex; flex-direction: column; }
.istatistik strong { font-family: var(--serif); font-size: 1.4rem; color: var(--mavi); }
.istatistik span { font-size: 0.8rem; color: var(--murekkep-3); }
.gunluk li { font-size: 0.92rem; padding: 0.45rem 0; border-bottom: 1px solid var(--cizgi); }
.madde { border-bottom: 1px solid var(--cizgi); padding: 0.8rem 0; max-width: var(--okuma); }
.madde h3 { margin: 0 0 0.3rem; }

/* arama */
.ara-form { display: flex; gap: 0.5rem; max-width: 40rem; }
.ara-form input { flex: 1; font: inherit; padding: 0.6rem 0.8rem; border: 1px solid var(--cizgi); border-radius: var(--koseli); background: var(--zemin-2); color: var(--murekkep); }
.ara-form button { font: inherit; background: var(--mavi); color: #fff; border: 0; border-radius: var(--koseli); padding: 0.6rem 1rem; cursor: pointer; }
.ara-sonuc { list-style: none; padding: 0; }
.ara-sonuc li { padding: 0.6rem 0; border-bottom: 1px solid var(--cizgi); }
.ara-sonuc mark { background: var(--sari-acik); color: inherit; padding: 0 0.1rem; }
.ara-tur { font-size: 0.78rem; color: var(--murekkep-3); margin-left: 0.4rem; }

/* büyütülmüş şekil */
.buyutme { position: fixed; inset: 0; background: rgba(5, 6, 15, 0.92); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 1rem; cursor: zoom-out; }
.buyutme img { max-width: 100%; max-height: 100%; object-fit: contain; }

/* alt */
.alt { border-top: 1px solid var(--cizgi); padding: 1.2rem 1rem 2rem; font-size: 0.85rem; color: var(--murekkep-3); max-width: 1200px; margin: 0 auto; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media print { .ust, .yan, .gez, .alt, .menu-dugme { display: none !important; } .sayfa { display: block; } }