:root {
  --zemin: #f6f8f7;
  --yuzey: #ffffff;
  --yuzey2: #eef3f1;
  --metin: #10201c;
  --soluk: #4d615c;
  --cizgi: #d8e2df;
  --vurgu: #0f9a84;
  --vurgu-metin: #ffffff;
  --vurgu-acik: #d6f5ee;
  --koyu-zemin: #0e1413;
  --koyu-metin: #e6efec;
  --golge: 0 1px 2px rgb(16 32 28 / .06), 0 8px 24px rgb(16 32 28 / .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --zemin: #0e1413;
    --yuzey: #151d1b;
    --yuzey2: #1b2522;
    --metin: #e6efec;
    --soluk: #9db0ab;
    --cizgi: #26332f;
    --vurgu: #3ddbc0;
    --vurgu-metin: #06231d;
    --vurgu-acik: #123a33;
    --koyu-zemin: #0a0f0e;
    --golge: none;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --zemin: #0e1413; --yuzey: #151d1b; --yuzey2: #1b2522; --metin: #e6efec; --soluk: #9db0ab;
  --cizgi: #26332f; --vurgu: #3ddbc0; --vurgu-metin: #06231d; --vurgu-acik: #123a33;
  --koyu-zemin: #0a0f0e; --golge: none; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--zemin);
  color: var(--metin);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-x: hidden;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5.5vw, 3.25rem); font-weight: 750; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; }
p { margin: 0 0 1em; }
a { color: var(--vurgu); }
b, strong { font-weight: 650; }

.kap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .kap { padding: 0 32px; } }

.atla { position: absolute; left: -999px; top: 8px; background: var(--vurgu); color: var(--vurgu-metin); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.atla:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--vurgu); outline-offset: 2px; border-radius: 6px; }

/* üst çubuk */
.ust { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--zemin) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--cizgi); }
.ust-ic { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.marka { display: flex; align-items: center; gap: 10px; color: var(--metin); text-decoration: none; font-weight: 750; letter-spacing: .06em; }
.logo { width: 30px; height: 30px; color: var(--vurgu); }
nav { display: flex; gap: 4px; align-items: center; }
nav a { color: var(--soluk); text-decoration: none; padding: 8px 10px; border-radius: 8px; font-size: .95rem; }
nav a:hover { color: var(--metin); background: var(--yuzey2); }
nav .nav-indir { color: var(--vurgu-metin); background: var(--vurgu); font-weight: 600; }
nav .nav-indir:hover { color: var(--vurgu-metin); background: var(--vurgu); filter: brightness(1.08); }
@media (max-width: 560px) { nav a:not(.nav-indir) { display: none; } }

/* giriş */
.giris { padding: 56px 0 64px; }
.giris-ic { display: grid; gap: 40px; align-items: center; }
@media (min-width: 900px) { .giris-ic { grid-template-columns: 1.1fr .9fr; gap: 56px; } .giris { padding: 88px 0 96px; } }
.etiket { display: inline-block; font-size: .85rem; font-weight: 600; color: var(--vurgu); background: var(--vurgu-acik); padding: 4px 10px; border-radius: 999px; margin-bottom: 18px; }
.alt { font-size: 1.15rem; color: var(--soluk); max-width: 36em; }
.dugmeler { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.dugme { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px; border-radius: 12px; font-weight: 650; text-decoration: none; border: 1px solid transparent; cursor: pointer; transition: filter .15s, background .15s; }
.dugme.ana { background: var(--vurgu); color: var(--vurgu-metin); }
.dugme.ana:hover { filter: brightness(1.08); }
.dugme.ikinci { border-color: var(--cizgi); color: var(--metin); background: var(--yuzey); }
.dugme.ikinci:hover { background: var(--yuzey2); }
.dugme.tam { width: 100%; }
.dugme.pasif { background: var(--yuzey2); color: var(--soluk); cursor: default; filter: none; border-color: var(--cizgi); }

/* örnek ekran */
.ornek { margin: 0; }
.ekran {
  background: linear-gradient(160deg, #17211f, #0b100f);
  border-radius: 22px; padding: 14px; border: 1px solid #2a3934;
  box-shadow: 0 2px 0 rgb(255 255 255 / .04) inset, 0 30px 60px -20px rgb(0 0 0 / .55), 0 12px 24px -12px rgb(15 154 132 / .35);
  transform: perspective(1200px) rotateY(-9deg) rotateX(4deg);
  transition: transform .25s ease-out;
  will-change: transform;
}
.kamera { position: relative; aspect-ratio: 4 / 3; border-radius: 12px; background: radial-gradient(120% 90% at 50% 30%, #1d2a27, #0a0f0e); overflow: hidden; box-shadow: 0 0 0 1px #22302c inset; }
.kamera canvas { position: absolute; inset: 0; width: 100%; height: 100%; cursor: grab; touch-action: pan-y; }
.kamera canvas:active { cursor: grabbing; }
.ipucu { position: absolute; bottom: 10px; right: 12px; font-size: .72rem; color: #9db0ab; background: rgb(0 0 0 / .45); padding: 2px 8px; border-radius: 999px; pointer-events: none; }
.iskelet { width: 100%; height: 100%; }
.egim { transition: transform .25s ease-out, box-shadow .25s; transform-style: preserve-3d; }
.kart.egim:hover, .adimlar .egim:hover { box-shadow: 0 18px 40px -18px rgb(16 32 28 / .35), 0 0 0 1px var(--vurgu-acik); }
@media (prefers-reduced-motion: reduce) { .ekran { transform: none; } }
@media (max-width: 899px) { .ekran { transform: perspective(1200px) rotateX(3deg); } }
.cizgi path { fill: none; stroke: #3ddbc0; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; opacity: .85; }
.nokta circle { fill: #e6efec; }
.canli { position: absolute; top: 10px; left: 12px; font-size: .75rem; color: #ff8a80; background: rgb(0 0 0 / .45); padding: 2px 8px; border-radius: 999px; }
.cikti { display: grid; gap: 4px; padding: 14px 6px 4px; color: #e6efec; }
.kelimeler b { display: inline-block; font-size: .75rem; letter-spacing: .08em; color: #3ddbc0; border: 1px solid #2c5a51; padding: 2px 8px; border-radius: 6px; margin-right: 4px; }
.cumle { font-size: 1.5rem; font-weight: 650; }
.ses { font-size: .85rem; color: #9db0ab; }
figcaption { font-size: .85rem; color: var(--soluk); margin-top: 10px; text-align: center; }

/* bölümler */
.bolum { padding: 64px 0; border-top: 1px solid var(--cizgi); scroll-margin-top: 60px; }
.bolum.ince { padding: 48px 0; }
.bolum.koyu { background: var(--yuzey2); }
.bolum-alt { color: var(--soluk); margin-top: -4px; }

.adimlar { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 16px; }
@media (min-width: 760px) { .adimlar { grid-template-columns: repeat(3, 1fr); } }
.adimlar li { background: var(--yuzey); border: 1px solid var(--cizgi); border-radius: 16px; padding: 22px; box-shadow: var(--golge); }
.adimlar p { color: var(--soluk); margin: 0; }
.no { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: var(--vurgu-acik); color: var(--vurgu); font-weight: 750; margin-bottom: 14px; }

.olcu { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.olcu li { text-align: center; padding: 16px 8px; }
.olcu strong { display: block; font-size: clamp(1.8rem, 5vw, 2.6rem); color: var(--vurgu); line-height: 1.1; font-variant-numeric: tabular-nums; }
.olcu span { font-size: .9rem; color: var(--soluk); }

.kartlar { display: grid; gap: 16px; margin-top: 28px; }
@media (min-width: 760px) { .kartlar { grid-template-columns: 1fr 1fr; } }
.kart { background: var(--yuzey); border: 1px solid var(--cizgi); border-radius: 16px; padding: 22px; display: grid; gap: 16px; align-content: start; box-shadow: var(--golge); }
.kart-bas { display: flex; gap: 14px; align-items: center; }
.kart h3 { margin: 0; }
.plat { width: 40px; height: 40px; flex: none; fill: var(--vurgu); stroke: var(--vurgu); stroke-width: 0; }
.kart[data-platform="android"] .plat { stroke-width: 1.2; stroke-linecap: round; }
.gereksinim { margin: 2px 0 0; font-size: .9rem; color: var(--soluk); }
.dosya-bilgi { margin: -4px 0 0; font-size: .85rem; color: var(--soluk); }

.sss { margin-top: 24px; background: var(--yuzey); border: 1px solid var(--cizgi); border-radius: 12px; padding: 14px 18px; }
.sss summary { cursor: pointer; font-weight: 600; }
.sss p { margin: 12px 0 0; color: var(--soluk); }
.ozet { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .8rem; word-break: break-all; }

.iki { display: grid; gap: 24px; }
@media (min-width: 760px) { .iki { grid-template-columns: 1fr 1fr; gap: 40px; } }
.blok .ikon { width: 30px; height: 30px; fill: none; stroke: var(--vurgu); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 8px; }
.kucuk { font-size: .9rem; color: var(--soluk); }

.kaynaklar { padding-left: 1.1em; margin: 16px 0 0; color: var(--soluk); font-size: .95rem; }
.kaynaklar li { margin-bottom: 6px; }
.kaynaklar b { color: var(--metin); font-weight: 600; }

.gizli-svg { position: absolute; }
.bulunamadi { min-height: 80vh; display: grid; place-content: center; text-align: center; gap: 8px; }

.alt-bilgi { border-top: 1px solid var(--cizgi); padding: 24px 0 32px; color: var(--soluk); font-size: .9rem; }
.alt-bilgi .kap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }