:root {
        /* Color System */
        --primary-color: #77216F;
        --secondary-color: #5E2750;
        --accent-color: #E95420;
        --light-bg: #F5F5F5;
        --dark-text: #333333;
        --light-text: #777777;
        --error-color: #dc3545;
        --success-color: #28a745;
        
        /* Spacing System */
        --space-xs: 0.5rem;
        --space-sm: 1rem;
        --space-md: 1.5rem;
        --space-lg: 2rem;
        --space-xl: 3rem;
        
        /* Borders & Shadows */
        --border-radius: 12px;
        --border-width: 1px;
        --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        --focus-ring: 0 0 0 3px rgba(119, 33, 111, 0.5);
        
        /* Transitions */
        --transition-fast: 0.15s ease;
        --transition-normal: 0.3s ease;
        --transition-slow: 0.5s ease;
        
        /* Card Styles */
        --card-bg: #FFFFFF;
        --card-padding: 2rem;
    }

    /* Base Styles */
    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'Ubuntu', 'Roboto', sans-serif;
        background-color: var(--light-bg);
        color: var(--dark-text);
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        margin: 0;
        padding: var(--space-md);
        background-image: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
        line-height: 1.6;
    }

    *:focus {
        outline: none;
        box-shadow: var(--focus-ring);
    }

    /* Layout */
    .login-container {
        width: 100%;
        max-width: 1200px;
    }

    .login-columns {
        display: flex;
        gap: var(--space-md);
        justify-content: center;
        align-items: stretch;
    }

    .login-column {
        flex: 1;
        min-width: 300px;
        max-width: 380px;
        background: var(--card-bg);
        border-radius: var(--border-radius);
        padding: var(--card-padding);
        box-shadow: var(--box-shadow);
        border: var(--border-width) solid rgba(0, 0, 0, 0.05);
        transition: transform var(--transition-normal), 
                    box-shadow var(--transition-normal);
    }

    .login-column:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    }

    /* Header Styles */
    .login-header {
        text-align: center;
        margin-bottom: var(--space-lg);
    }

    .login-logo {
        width: 150px;
        height: 150px;
        margin-bottom: var(--space-sm);
        border-radius: 50%;
        object-fit: cover;
        border: 3px solid var(--primary-color);
        padding: 3px;
    }

    .login-header h3 {
        font-weight: 700;
        color: var(--primary-color);
        margin-bottom: var(--space-xs);
        font-size: 1.5rem;
    }

    .login-header p {
        color: var(--light-text);
        margin-bottom: 0;
        font-size: 0.9rem;
    }

    .login-method-title {
        font-weight: 600;
        color: var(--primary-color);
        margin-bottom: var(--space-md);
        text-align: center;
        font-size: 1.25rem;
        position: relative;
        padding-bottom: var(--space-xs);
    }

    .login-method-title:after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 50px;
        height: 3px;
        background: var(--accent-color);
        border-radius: 3px;
    }

    /* Form Elements */
    .form-control, 
    .form-select {
        border-radius: var(--border-radius);
        padding: 0.75rem 1rem;
        border: var(--border-width) solid #ddd;
        transition: border-color var(--transition-fast),
                    box-shadow var(--transition-fast);
        width: 100%;
    }

    .form-control:focus, 
    .form-select:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 0.25rem rgba(119, 33, 111, 0.2);
    }

    .input-group {
        display: flex;
        align-items: stretch;
    }

    .input-group-text {
        border-radius: var(--border-radius) 0 0 var(--border-radius);
        background-color: #f8f9fa;
        border: var(--border-width) solid #ddd;
        border-right: none;
        padding: 0.75rem 1rem;
        display: flex;
        align-items: center;
    }

    .input-group .form-control {
        position: relative;
        flex: 1 1 auto;
        z-index: 1;
    }

    /* Buttons */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-weight: 500;
        text-align: center;
        white-space: nowrap;
        vertical-align: middle;
        user-select: none;
        border: var(--border-width) solid transparent;
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
        line-height: 1.5;
        border-radius: var(--border-radius);
        transition: all var(--transition-normal);
        cursor: pointer;
    }

    .btn-primary {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
        letter-spacing: 0.5px;
        box-shadow: 0 2px 10px rgba(119, 33, 111, 0.3);
    }

    .btn-primary:hover {
        background-color: var(--secondary-color);
        border-color: var(--secondary-color);
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(119, 33, 111, 0.4);
    }

    .btn-primary:focus {
        box-shadow: 0 0 0 0.25rem rgba(119, 33, 111, 0.3);
    }

    .btn-primary:active {
        transform: translateY(0);
        box-shadow: 0 1px 5px rgba(119, 33, 111, 0.3);
    }

    .btn-primary:disabled {
        background-color: #cccccc;
        border-color: #cccccc;
        transform: none;
        box-shadow: none;
        cursor: not-allowed;
    }

    .btn-outline-secondary {
        border-color: #6c757d;
        color: #6c757d;
        background-color: transparent;
    }

    .btn-outline-secondary:hover {
        background-color: #6c757d;
        color: white;
    }

    /* Validation */
    .invalid-feedback {
        display: none;
        width: 100%;
        margin-top: 0.25rem;
        font-size: 0.85rem;
        color: var(--error-color);
    }

    .was-validated .form-control:invalid,
    .was-validated .form-select: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 stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
        background-repeat: no-repeat;
        background-position: right calc(0.375em + 0.1875rem) center;
        background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    }

    .was-validated .form-control:invalid ~ .invalid-feedback,
    .was-validated .form-select:invalid ~ .invalid-feedback {
        display: block;
    }

    /* Password Strength Meter */
    .password-strength-meter {
        margin-top: var(--space-xs);
        background-color: #f0f0f0;
        border-radius: var(--border-radius);
        padding: var(--space-xs);
    }

    .progress {
        height: 6px;
        background-color: #e9ecef;
        border-radius: 3px;
        overflow: hidden;
    }

    .progress-bar {
        height: 100%;
        transition: width var(--transition-slow);
    }

    .strength-text {
        font-size: 0.8rem;
        font-weight: 500;
        margin-top: 0.25rem;
        color: var(--light-text);
    }

    .strength-percentage {
        font-weight: 600;
    }

    /* Password strength colors */
    .progress-bar-weak {
        background-color: var(--error-color);
    }

    .progress-bar-fair {
        background-color: #fd7e14;
    }

    .progress-bar-good {
        background-color: #ffc107;
    }

    .progress-bar-strong {
        background-color: var(--success-color);
    }

    .progress-bar-very-strong {
        background-color: #20c997;
    }

    /* Role Select */
    .form-select {
        text-align: center;
        text-align-last: center;
        appearance: none;
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
        background-repeat: no-repeat;
        background-position: right 0.75rem center;
        background-size: 16px 12px;
    }

    .form-select option {
        text-align: left;
    }

    .role-icon {
        margin-right: 8px;
        font-size: 1.1rem;
    }

    /* Face Recognition */
    .face-recognition-container {
        position: relative;
        width: 100%;
        height: 200px;
        background-color: #f0f0f0;
        border-radius: var(--border-radius);
        overflow: hidden;
        margin-bottom: var(--space-md);
        display: flex;
        justify-content: center;
        align-items: center;
    }

    #video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    #canvas {
        position: absolute;
        top: 0;
        left: 0;
        display: none;
    }

    .face-recognition-placeholder {
        text-align: center;
        color: var(--light-text);
        padding: var(--space-md);
    }

    .face-recognition-placeholder i {
        font-size: 2.5rem;
        margin-bottom: var(--space-sm);
        color: var(--primary-color);
    }

    .face-recognition-btn {
        width: 100%;
        margin-top: var(--space-sm);
    }

    /* E-ID Options */
    .eid-options {
        display: flex;
        flex-direction: column;
        gap: var(--space-sm);
        margin-top: var(--space-md);
    }

    .eid-option {
        display: flex;
        align-items: center;
        padding: var(--space-sm);
        background-color: #f8f9fa;
        border-radius: var(--border-radius);
        cursor: pointer;
        transition: all var(--transition-normal);
    }

    .eid-option:hover {
        background-color: #e9ecef;
        transform: translateY(-2px);
    }

    .eid-option i {
        margin-right: var(--space-sm);
        font-size: 1.2rem;
        color: var(--primary-color);
    }

    .eid-option .option-text {
        flex: 1;
    }

    .eid-option .option-title {
        font-weight: 500;
        margin-bottom: 0.2rem;
    }

    .eid-option .option-desc {
        font-size: 0.8rem;
        color: var(--light-text);
    }

    /* Footer */
    .login-footer {
        text-align: center;
        margin-top: var(--space-xl);
        font-size: 0.9rem;
        color: var(--light-text);
    }

    .login-footer a {
        color: var(--primary-color);
        text-decoration: none;
        transition: color var(--transition-fast);
    }

    .login-footer a:hover {
        color: var(--secondary-color);
        text-decoration: underline;
    }

    /* Responsive Adjustments */
    @media (max-width: 992px) {
        .login-columns {
            flex-direction: column;
            align-items: center;
        }
        
        .login-column {
            width: 100%;
            max-width: 500px;
            margin-bottom: var(--space-md);
        }
        
        .login-column:last-child {
            margin-bottom: 0;
        }
    }

    @media (max-width: 768px) {
        :root {
            --card-padding: 1.5rem;
        }
        
        body {
            padding: var(--space-sm);
        }
    }

    /* Print Styles */
    @media print {
        body {
            background: white;
            color: black;
            padding: 0;
        }
        
        .login-column {
            box-shadow: none;
            border: var(--border-width) solid #ddd;
            margin: 0;
            page-break-inside: avoid;
        }
        
        .btn-primary {
            color: black;
            background: white;
            border: var(--border-width) solid black;
        }
        
        .login-footer {
            margin-top: var(--space-lg);
        }
    }