/* Additional animations and effects for modern login */

/* Particle Animation Background */
.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float-particle 6s infinite linear;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) rotate(360deg);
        opacity: 0;
    }
}

/* Enhanced button hover effects */
.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:active::after {
    width: 300px;
    height: 300px;
}

/* Form input focus glow */
.form-group input:focus,
.form-group select:focus {
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1),
                0 0 20px rgba(102, 126, 234, 0.2);
}

/* Tab switching animation */
.form-tab {
    position: relative;
    overflow: hidden;
}

.form-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.form-tab:hover::before {
    left: 100%;
}

/* Success/Error message animations */
.alert {
    animation: slideInDown 0.5s ease-out;
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(-100%);
    animation: progressBar 3s ease-out;
}

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

@keyframes progressBar {
    to {
        transform: translateX(0);
    }
}

/* Loading spinner for form submission */
.btn-primary.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-primary.loading::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
}

/* Enhanced mobile responsiveness */
@media (max-width: 576px) {
    .welcome-text h1 {
        font-size: 1.6rem;
    }
    
    .form-header h2 {
        font-size: 1.3rem;
    }
    
    .form-tabs {
        flex-direction: column;
        gap: 5px;
    }
    
    .form-tab {
        border-radius: 6px;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    .login-container {
        background: rgba(30, 30, 30, 0.95);
        color: #fff;
    }
    
    .form-group input,
    .form-group select {
        background: #333;
        color: #fff;
        border-color: #555;
    }
    
    .form-group label {
        background: #333;
        color: #ccc;
    }
    
    .form-header h2 {
        color: #fff;
    }
    
    .form-header p {
        color: #ccc;
    }
}

/* Accessibility improvements */
.form-group input:focus,
.form-group select:focus,
.btn-primary:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Smooth transitions for all interactive elements */
* {
    transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

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

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #5a6fd8, #6a4190);
}