:root {
    --primary-color: #28a745;
    --secondary-color: #007bff;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.hero-section {
    background: linear-gradient(135deg, var(--success-color) 0%, var(--secondary-color) 100%);
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--success-color) 0%, var(--secondary-color) 100%);
}

.card {
    transition: transform 0.2s ease-in-out;
    border-radius: 15px;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    margin-bottom: 1rem;
}

.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
    padding: 0.75rem 1rem;
}

.form-control:focus {
    border-color: var(--success-color);
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

.form-control-lg {
    padding: 1rem 1.25rem;
    font-size: 1.125rem;
}

.btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 0.75rem 2rem;
    transition: all 0.3s ease;
    border: none;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #218838 0%, #1aa179 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(40, 167, 69, 0.3);
}

.btn-primary {
    background: linear-gradient(135deg, #007bff 0%, #6f42c1 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0056b3 0%, #5a32a3 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0, 123, 255, 0.3);
}

.premium-features {
    background: rgba(255, 193, 7, 0.1);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    display: inline-block;
    border: 1px solid rgba(255, 193, 7, 0.3);
}

.badge {
    font-size: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: 20px;
}

.price {
    margin: 1.5rem 0;
}

.display-4 {
    font-weight: 800;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--success-color);
    display: block;
}

.url-item {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.url-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.short-url {
    color: var(--success-color);
    font-weight: 600;
    text-decoration: none;
    font-size: 1.1rem;
}

.short-url:hover {
    color: #218838;
    text-decoration: underline;
}

.interstitial-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--success-color) 0%, var(--secondary-color) 100%);
    padding: 2rem;
}

.interstitial-content {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    width: 100%;
}

.advertisement-container {
    margin: 2rem 0;
}

.ad-placeholder {
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 10px;
    border: 2px dashed #dee2e6;
}

.countdown {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.text-gradient {
    background: linear-gradient(135deg, var(--success-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.shadow-lg {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1) !important;
}

.border-primary {
    border-color: var(--secondary-color) !important;
    border-width: 2px !important;
}

.alert {
    border-radius: 10px;
    border: none;
    padding: 1rem 1.5rem;
}

.alert-success {
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.1) 0%, rgba(32, 201, 151, 0.1) 100%);
    color: #155724;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1) 0%, rgba(255, 87, 87, 0.1) 100%);
    color: #721c24;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(255, 235, 59, 0.1) 100%);
    color: #856404;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1) 0%, rgba(111, 66, 193, 0.1) 100%);
    color: #0c5460;
    border-left: 4px solid var(--secondary-color);
}

.input-group-text {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid #e9ecef;
    border-radius: 10px 0 0 10px;
    color: #6c757d;
}

.navbar {
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
}

.navbar-nav .nav-link {
    font-weight: 500;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--success-color) !important;
}

@media (max-width: 768px) {
    .hero-section {
        text-align: center;
        padding: 4rem 0;
        min-height: 50vh;
    }

    .display-4 {
        font-size: 2rem;
    }

    .interstitial-content {
        padding: 2rem;
        margin: 1rem;
    }

    .card {
        margin-bottom: 1rem;
    }

    .url-item {
        padding: 1rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
    }

    .stats-number {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.25rem;
    }

    .hero-section h1 {
        font-size: 1.75rem;
    }

    .premium-features {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

@keyframes slideIn {
    from { 
        transform: translateX(-20px); 
        opacity: 0; 
    }
    to { 
        transform: translateX(0); 
        opacity: 1; 
    }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--success-color), var(--secondary-color));
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #218838, #0056b3);
}