/* Custom CSS for Voyage Calculator - Professional White & Blue Design */
.gradient-bg {
    background: #f8fafc;
    background-attachment: fixed;
}

.glass-effect {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.wave-bg {
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M0 30 Q15 20 30 30 T60 30' stroke='rgba(255,255,255,0.1)' stroke-width='1' fill='none'/%3E%3Cpath d='M0 35 Q15 25 30 35 T60 35' stroke='rgba(255,255,255,0.05)' stroke-width='1' fill='none'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

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

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

/* Loading spinner */
.spinner {
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 2px solid #3B82F6;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Form focus states */
.form-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.5);
    border-color: #3B82F6;
}

/* Button hover effects */
.btn-hover:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Card hover effects */
.card-hover:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Responsive text */
@media (max-width: 640px) {
    .text-responsive {
        font-size: 1.5rem;
    }
}

@media (min-width: 641px) {
    .text-responsive {
        font-size: 2rem;
    }
}

@media (min-width: 1024px) {
    .text-responsive {
        font-size: 3rem;
    }
}