body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f172a;
  color: #e2e8f0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
.giris-kutu {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 32px;
  width: min(92vw, 360px);
  text-align: center;
}
.giris-kutu h1 { margin: 0 0 8px; }
.giris-kutu p { color: #94a3b8; font-size: 14px; }
input[type="password"] {
  width: 100%;
  padding: 12px;
  margin: 16px 0 12px;
  border-radius: 8px;
  border: 1px solid #334155;
  background: #0f172a;
  color: #e2e8f0;
  font-size: 15px;
}
button {
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 8px;
  background: #38bdf8;
  color: #06283d;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}