:root {
  --zemin: #343a32;
  --panel: #3e443c;
  --cizgi: #555c45;
  --vurgu: #a6b96f;
  --vurgu-ustu: #262b22;
  --metin: #e8eedd;
  --solgun: #bcc4ad;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--zemin);
  color: var(--metin);
  font: 16px/1.55 system-ui, 'Segoe UI', Roboto, sans-serif;
}
a { color: var(--vurgu); }
img { max-width: 100%; height: auto; display: block; }

.ust, main, .alt { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.ust { display: flex; align-items: center; justify-content: space-between; padding-top: 16px; padding-bottom: 16px; }
.marka { display: flex; align-items: center; gap: 10px; color: var(--metin); text-decoration: none; font-weight: 600; font-size: 18px; }
.dil { display: flex; border: 1px solid var(--cizgi); border-radius: 8px; overflow: hidden; }
.dil button { background: none; border: 0; color: var(--solgun); font: inherit; font-size: 14px; padding: 6px 12px; cursor: pointer; }
.dil button[aria-pressed='true'] { background: var(--vurgu); color: var(--vurgu-ustu); font-weight: 600; }

.giris { text-align: center; padding: 48px 0 32px; }
h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.2; margin: 0 auto 16px; max-width: 18ch; }
.alt-satir { color: var(--solgun); font-size: 18px; margin: 0 auto 28px; max-width: 46ch; }
.dugmeler { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.dugme { display: inline-block; padding: 14px 26px; border-radius: 10px; font-weight: 600; text-decoration: none; }
.dugme.birincil { background: var(--vurgu); color: var(--vurgu-ustu); }
.dugme.ikincil { border: 1px solid var(--cizgi); color: var(--metin); }
.dugme[hidden] { display: none; }
.surum { color: var(--solgun); font-size: 14px; margin: 14px 0 4px; }
.not { color: var(--solgun); font-size: 13px; margin: 0; }

.ekranlar { padding: 16px 0 40px; }
.ekranlar img { border: 1px solid var(--cizgi); border-radius: 12px; }
.buyuk { margin-bottom: 16px; }
.kucukler { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

h2 { font-size: 24px; margin: 0 0 16px; }
.ozellikler, .gecis { background: var(--panel); border: 1px solid var(--cizgi); border-radius: 12px; padding: 24px; margin-bottom: 24px; }
.ozellikler ul { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 24px; }
.ozellikler li::before { content: '🐸'; margin-right: 8px; }
.gecis p { margin: 0; color: var(--solgun); max-width: 70ch; }

.alt { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: center; color: var(--solgun); font-size: 14px; padding-top: 16px; padding-bottom: 40px; }

@media (max-width: 640px) {
  .giris { padding-top: 24px; }
  .kucukler { grid-template-columns: 1fr; }
  .ozellikler ul { grid-template-columns: 1fr; }
  .dugme { width: 100%; text-align: center; }
}