/* Form container */
.form-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    max-width: 500px;
    margin: 0 auto;
}

/* Form styles */
.registration-form {
    width: 100%;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2d3748;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: #4c51bf;
    box-shadow: 0 0 0 3px rgba(76, 81, 191, 0.1);
    transform: translateY(-1px);
}

.form-input:invalid {
    border-color: #f56565;
}

.form-input:valid {
    border-color: #48bb78;
}

/* Button styles */
.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex: 1;
}

.btn-primary {
    background: linear-gradient(135deg, #4c51bf, #667eea);
    color: white;
    box-shadow: 0 4px 15px rgba(76, 81, 191, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(76, 81, 191, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
    border: 2px solid #cbd5e0;
}

.btn-secondary:hover {
    background: #cbd5e0;
    transform: translateY(-1px);
}

/* Form validation styles */
.form-input.error {
    border-color: #f56565;
    animation: shake 0.5s ease-in-out;
}

.form-input.success {
    border-color: #48bb78;
}

.error-message {
    color: #f56565;
    font-size: 0.8rem;
    margin-top: 0.25rem;
    display: block;
}

.success-message {
    color: #48bb78;
    font-size: 0.8rem;
    margin-top: 0.25rem;
    display: block;
}

/* Animations */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

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

.form-container {
    animation: fadeIn 0.6s ease-out;
}

/* Loading state */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive form design */
@media (max-width: 768px) {
    .form-container {
        padding: 2rem 1.5rem;
        margin: 0 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* Focus states for accessibility */
.btn:focus {
    outline: 2px solid #4c51bf;
    outline-offset: 2px;
}

.form-input:focus {
    outline: 2px solid #4c51bf;
    outline-offset: 2px;
}