:root {
        --primary: #4361ee;
        --secondary: #3f37c9;
        --accent: #4895ef;
        --light: #f8f9fa;
        --dark: #212529;
        --success: #4cc9f0;
        --warning: #f72585;
        --border-radius: 12px;
        --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
        --transition: all 0.3s ease;
    }
    
    body {
        font-family: 'Poppins', sans-serif;
        background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
        color: var(--dark);
        min-height: 100vh;
        margin: 0;
        background-attachment: fixed;
    }
    
    .navbar {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        box-shadow: var(--box-shadow);
        padding: 0.8rem 1rem;
    }
    
    .navbar-brand {
        font-weight: 700;
        color: var(--primary) !important;
        font-size: 1.5rem;
        display: flex;
        align-items: center;
    }
    
    .navbar-brand img {
        margin-right: 10px;
    }
    
    .nav-link {
        font-weight: 500;
        color: var(--dark) !important;
        padding: 0.5rem 1rem !important;
        border-radius: var(--border-radius);
        transition: var(--transition);
    }
    
    .nav-link:hover, .nav-link.active {
        background: rgba(67, 97, 238, 0.1);
        color: var(--primary) !important;
    }
    
    .main-container {
        max-width: 1200px;
        margin: 2rem auto;
        padding: 0 1rem;
    }
    
    .card {
        border: none;
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow);
        overflow: hidden;
        transition: var(--transition);
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
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    }
    
    .card:hover {
        transform: translateY(-5px);
        box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
    }
    
    .card-header {
        background: var(--primary);
        color: white;
        font-weight: 600;
        border-bottom: none;
        padding: 1.25rem;
    }
    
    .form-control, .form-select {
        border-radius: var(--border-radius);
        padding: 0.75rem 1rem;
        border: 1px solid #e0e0e0;
        transition: var(--transition);
    }
    
    .form-control:focus, .form-select:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.25);
    }
    
    .btn-primary {
        background: var(--primary);
        border: none;
        padding: 0.75rem 1.5rem;
        font-weight: 600;
        border-radius: var(--border-radius);
        transition: var(--transition);
    }
    
    .btn-primary:hover {
        background: var(--secondary);
        transform: translateY(-2px);
    }
    
    .btn-block {
        width: 100%;
    }
    
    .alert {
        border-radius: var(--border-radius);
        border: none;
    }
    
    .alert-warning {
        background: var(--warning);
        color: white;
    }
    
    .alert-success {
        background: var(--success);
        color: white;
    }
    
    .alert a {
        color: white;
        text-decoration: underline;
        font-weight: 600;
    }
    
    .network-badge {
        display: inline-block;
        padding: 0.35rem 0.75rem;
        border-radius: 50px;
        font-weight: 600;
        font-size: 0.85rem;
        background: rgba(67, 97, 238, 0.1);
        color: var(--primary);
        margin-right: 0.5rem;
        margin-bottom: 0.5rem;
    }
    
    .loader {
        border: 4px solid rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        border-top: 4px solid var(--primary);
        width: 30px;
        height: 30px;
        animation: spin 1s linear infinite;
        margin: 0 auto;
    }
    
    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
    
    .order-summary {
        background: white;
        border-radius: var(--border-radius);
        padding: 2rem;
        box-shadow: var(--box-shadow);
    }
    
    .order-item {
        display: flex;
        justify-content: space-between;
        padding: 0.75rem 0;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .order-item:last-child {
        border-bottom: none;
    }
    
    .order-label {
        font-weight: 500;
        color: #666;
    }
    
    .order-value {
        font-weight: 600;
    }
    
    .payment-options {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 1rem;
        margin-top: 1.5rem;
    }
    
    .payment-option {
        border: 1px solid #e0e0e0;
        border-radius: var(--border-radius);
        padding: 1rem;
        text-align: center;
        cursor: pointer;
        transition: var(--transition);
    }
    
    .payment-option:hover {
        border-color: var(--primary);
        background: rgba(67, 97, 238, 0.05);
    }
    
    .payment-option img {
        height: 30px;
        margin-bottom: 0.5rem;
    }
    
    .payment-option.active {
        border: 2px solid var(--primary);
        background: rgba(67, 97, 238, 0.1);
    }
    
    footer {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        color: var(--dark);
        text-align: center;
        padding: 0px;
        margin-top: 0px;
    }
    
    .waves {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 100px;
        z-index: -1;
    }
    
    .wave {
        position: absolute;
        bottom: 0;
        left: 0;
        width: 200%;
        height: 12em;
        background: rgba(255, 255, 255, 0.25);
        border-radius: 1000% 1000% 0 0;
        animation: wave 10s -3s linear infinite;
        transform: translate3d(0, 0, 0);
        opacity: 0.8;
    }
    
    .wave:nth-of-type(2) {
        bottom: -1.25em;
        animation: wave 18s linear reverse infinite;
        opacity: 0.8;
    }
    
    .wave:nth-of-type(3) {
        bottom: -2.5em;
        animation: wave 20s -1s reverse infinite;
        opacity: 0.9;
    }
    
    @keyframes wave {
        2% { transform: translateX(1); }
        25% { transform: translateX(-25%); }
        50% { transform: translateX(-50%); }
        75% { transform: translateX(-25%); }
        100% { transform: translateX(1); }
    }
    
    @media (max-width: 768px) {
        .payment-options {
            grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        }
        
        .navbar-brand {
            font-size: 1.25rem;
        }
    }
   
/* Container styling */
#custom-cards {
  animation: fadeIn 1s ease-in-out;
}

/* Heading styling */
#networktitle {
  font-size: 2.2rem;
  font-weight: bold;
  background: linear-gradient(90deg, #4CAF50, #2196F3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
  margin-bottom: 30px;
}

/* Card base styles */
.card.card-cover {
  background-size: cover;
  background-position: center;
  border: none;
  position: relative;
  height: 30px;
  overflow: hidden;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

/* Dark overlay for text readability */
.card.card-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  
  transition: background 0.4s ease;
}

/* Card hover effects */
.card.card-cover:hover {
  transform: scale(1.05);
  box-shadow: 0px 15px 25px rgba(0,0,0,0.4);
}
.card.card-cover:hover::before {
  background: rgba(0,0,0,0.6);
}

/* Text styling */
.card h2 {
  font-size: 1.8rem;
  font-weight: bold;
  z-index: 2;
}

/* Smooth fade animation */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Optional: subtle glow */
.card.card-cover:hover h2 {
  text-shadow: 0 0 10px rgba(255,255,255,0.8);
}