:root { --bg: #f2f3f5; --panel: #ffffff; --ink: #1b2530; --ink-2: #4f5b66; --line: #c5ccd3; --accent: #d9622b; --hata: #c8342f; color-scheme: light; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f151b; --panel: #161e26; --ink: #e6ebef; --ink-2: #a9b4bd; --line: #34414d; --hata: #e2615c; color-scheme: dark; } }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: var(--bg); color: var(--ink);
  font: 14px/1.5 "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif; padding: 24px 16px; }
.kutu { width: 100%; max-width: 340px; display: grid; gap: 16px; }
.marka b { display: block; font-size: 18px; font-weight: 600; }
.marka span { color: var(--ink-2); font-size: 13px; }
form { background: var(--panel); border: 1px solid var(--line); border-radius: 3px; padding: 20px; display: grid; gap: 6px; }
label { font-size: 12.5px; color: var(--ink-2); margin-top: 6px; }
input { font: inherit; padding: 7px 9px; border: 1px solid var(--line); border-radius: 3px; background: transparent; color: inherit; }
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button { margin-top: 12px; font: inherit; font-weight: 500; padding: 8px; border: 0; border-radius: 3px; background: var(--ink); color: var(--panel); cursor: pointer; }
.hata { margin: 0 0 4px; color: var(--hata); font-size: 13px; }
.not { margin: 0; font-size: 12px; color: var(--ink-2); }