:root{
    --primary:#0d6efd;
    --success:#198754;
    --dark:#1f2937;
    --light:#f8f9fa;
    --white:#ffffff;
    --muted:#6c757d;
  }
  
  *{margin:0;padding:0;box-sizing:border-box}
  
  /* Layout (footer altta kalsın isteyen sayfalar için) */
  html, body{height:100%}
  body{
    font-family:"Segoe UI",Roboto,sans-serif;
    background:var(--light);
    color:var(--dark);
  }
  
  /* TOP HEADER */
  header{
    background:var(--primary);
    color:#fff;
    text-align:center;
    padding:8px;
    font-size:.9rem;
  }
  
  /* NAVBAR */
  .navbar{
    background:var(--white);
    box-shadow:0 2px 8px rgba(0,0,0,.08);
  }
  .navbar-brand{
    font-weight:700;
    color:var(--primary)!important;
    font-size:1.3rem;
    letter-spacing:.5px;
  }