body { background-color: #0f172a; color: white; font-family: 'Segoe UI', sans-serif; margin: 0; }

/* Giriş Sayfası Tasarımı */
.auth-box { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); 
            background: #1e293b; padding: 40px; border-radius: 20px; text-align: center; width: 320px; }
input { display: block; width: 100%; margin: 10px 0; padding: 12px; background: #334155; border: none; color: white; border-radius: 8px; }
button { width: 100%; padding: 12px; background: #3b82f6; border: none; color: white; cursor: pointer; border-radius: 8px; font-weight: bold; }

/* Dashboard Tasarımı */
.top-bar { background: #1e293b; padding: 15px 30px; display: flex; justify-content: space-between; border-bottom: 2px solid #3b82f6; }
.main-grid { padding: 40px; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }