:root {
  --atu-primary: #003366;
  --atu-secondary: #E31E24;
  --atu-light-bg: #f8f9fa;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  padding-top: 76px;
  background-color: #f5f7fa;
}

/* Beyaz Navbar */
.navbar-white {
  background-color: #ffffff !important;
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

  .navbar-white .navbar-brand {
    color: var(--atu-primary) !important;
    font-weight: 700;
  }

    .navbar-white .navbar-brand img {
      height: 40px;
    }

  .navbar-white .nav-link {
    color: #2c3e50 !important;
    font-weight: 600;
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
  }

    .navbar-white .nav-link:hover {
      color: var(--atu-primary) !important;
      background-color: rgba(0, 51, 102, 0.05);
    }

    .navbar-white .nav-link.active {
      color: var(--atu-primary) !important;
      background-color: rgba(0, 51, 102, 0.08);
    }

      .navbar-white .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background-color: var(--atu-secondary);
        border-radius: 2px;
      }

  .navbar-white .navbar-toggler {
    border-color: var(--atu-primary);
  }

  .navbar-white .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 51, 102, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  }
.bg-atu-primary {
  background-color: var(--atu-primary) !important;
}

.text-atu-primary {
  color: var(--atu-primary) !important;
}

.text-atu-secondary {
  color: var(--atu-secondary) !important;
}

.btn-atu-primary {
  background-color: var(--atu-primary);
  color: white;
}
/* Back to Top butonu */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: #c41a1f;
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 999;
  box-shadow: 0 4px 15px rgba(13, 110, 253, 0.3);
}

  .back-to-top.show {
    opacity: 1;
    visibility: visible;
  }

  .back-to-top:hover {
    background: #c41a1f;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.4);
  }

/* Hero Section */
.hero-section {
  padding: 120px 0 60px 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* Footer sosyal ikonlar */
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: white;
  margin: 0 5px;
  transition: all 0.3s ease;
  text-decoration: none;
}

  .social-icon:hover {
    background: #0d6efd;
    color: white;
    transform: translateY(-2px);
  }

footer {
  background-color: #1a1a2e;
  color: #eee;
}

  footer a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s ease;
  }

    footer a:hover {
      color: white;
    }

.logo {

}