:root {
  --zemin: #f7f7fb;
  --yuzey: #ffffff;
  --metin: #16161d;
  --soluk: #5b5b6b;
  --altin: #f5b700;
  --cizgi: #e4e4ee;
}

@media (prefers-color-scheme: dark) {
  :root {
    --zemin: #0f1020;
    --yuzey: #1a1b2e;
    --metin: #ededf5;
    --soluk: #a8a8bd;
    --cizgi: #2a2b44;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--zemin);
  color: var(--metin);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

header img { width: 48px; height: 48px; border-radius: 12px; }
header a { color: inherit; text-decoration: none; font-weight: 800; font-size: 22px; }

h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--metin); }
.soluk { color: var(--soluk); font-size: 15px; }

a { color: #b38600; }
@media (prefers-color-scheme: dark) { a { color: var(--altin); } }

.kart {
  background: var(--yuzey);
  border: 1px solid var(--cizgi);
  border-radius: 16px;
  padding: 20px;
  margin: 16px 0;
}

.dugme {
  display: inline-block;
  background: var(--altin);
  color: #16161d;
  font-weight: 700;
  text-decoration: none;
  padding: 14px 22px;
  border-radius: 14px;
}

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--cizgi);
  font-size: 14px;
  color: var(--soluk);
}

footer a { margin-right: 16px; }