/* Custom Styles for Form Validation Project */

:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --error-color: #dc3545;
    --warning-color: #fd7e14;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Body and General Styles */
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    line-height: 1.6;
}

/* Card Enhancements */
.card {
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.card-header {
    border-bottom: 3px solid rgba(255, 255, 255, 0.2);
    padding: 1.5rem;
}

.card-body {
    background-color: #fff;
}

/* Form Input Styles */
.form-control {
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    outline: none;
}

/* Validation States */
.form-control.is-valid {
    border-color: var(--success-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='m2.3 6.73.94-.94 2.94-2.94c.39-.39 1.02-.39 1.41 0l.7.7c.39.39.39 1.02 0 1.41l-4.24 4.24c-.39.39-1.02.39-1.41 0l-2.12-2.12c-.39-.39-.39-1.02 0-1.41l.7-.7c.39-.39 1.02-.39 1.41 0z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 3rem;
}

.form-control.is-invalid {
    border-color: var(--error-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='m5.8 4.6 1.4 1.4m0 0 1.4 1.4m-1.4-1.4-1.4 1.4m1.4-1.4 1.4-1.4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 3rem;
}

/* Error Message Styles */
.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    margin-bottom: 0;
    min-height: 1.25rem;
    display: block;
    transition: var(--transition);
}

.error-message:empty {
    min-height: 0;
}

/* Password Requirements */
.password-requirements {
    font-size: 0.8rem;
    color: #6c757d;
}

/* Password Toggle Button */
.password-toggle {
    border: none;
    background: none;
    padding: 0.5rem;
    color: #6c757d;
    z-index: 10;
    transition: var(--transition);
    text-decoration: none;
}

.password-toggle:hover {
    color: var(--primary-color);
}

.password-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Form Labels */
.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* Submit Button */
.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0d5db8);
    border: none;
    border-radius: var(--border-radius);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(13, 110, 253, 0.3);
}

.btn-primary:focus {
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.5);
}

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

/* Success Message */
.alert-success {
    border: none;
    border-left: 4px solid var(--success-color);
    background-color: #f8f9fa;
    color: var(--success-color);
    border-radius: var(--border-radius);
}

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

.btn-loading::after {
    content: "";
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .form-control {
        font-size: 16px; /* Prevent zoom on iOS */
    }
}

/* Focus Styles for Accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Support */
@media (prefers-contrast: high) {
    .form-control {
        border-width: 3px;
    }
    
    .error-message {
        font-weight: bold;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}