:root { --mavi: #1d4ed8; --metin: #111827; --soluk: #4b5563; --cizgi: #e5e7eb; }

* { box-sizing: border-box; }

body {
    margin: 0;
    background: #f8fafc;
    color: var(--metin);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
}

main {
    max-width: 720px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

header { border-bottom: 2px solid var(--mavi); padding-bottom: 18px; margin-bottom: 30px; }
.marka { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--mavi); font-weight: 600; }
h1 { font-size: 28px; font-weight: 650; margin: 8px 0 4px; letter-spacing: -.01em; }
.tarih { color: var(--soluk); font-size: 14px; margin: 0; }

section { margin-bottom: 28px; }
h2 { font-size: 18px; font-weight: 600; margin: 0 0 8px; }
p { margin: 0 0 12px; color: #1f2937; }
ul { margin: 0 0 12px; padding-left: 22px; color: #1f2937; }
li { margin-bottom: 6px; }

code {
    background: #eef2ff;
    border: 1px solid #c7d2fe;
    border-radius: 5px;
    padding: 1px 6px;
    font-size: 14px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

a { color: var(--mavi); }

footer {
    border-top: 1px solid var(--cizgi);
    padding-top: 18px;
    margin-top: 40px;
    font-size: 14px;
}

@media (max-width: 600px) {
    main { padding: 26px 16px 60px; }
    h1 { font-size: 23px; }
}