/* CGPA Converter Pro - Professional Styling */

/* Root Variables */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-warning: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-info: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition: all 0.3s ease;
}

/* Global Styles - Force White Background */
html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #212529 !important;
    padding-top: 0px;
    background-color: #ffffff !important;
    background: #ffffff !important;
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: hidden;
}

/* Ensure main content areas stay white */
.main-content {
    background-color: #ffffff !important;
    background: #ffffff !important;
    padding-top: 20px;
}

/* Footer text visibility fix */
footer, footer *, .bg-dark, .bg-dark * {
    color: #ffffff !important;
}

footer .text-muted {
    color: #adb5bd !important;
}

.main-content {
    padding-top: 20px;
    min-height: calc(100vh - 20px);
    background-color: #ffffff !important;
    background: #ffffff !important;
}

/* Navigation Styles */
.navbar {
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    background: var(--gradient-primary) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    transform: translateY(-2px);
    color: rgba(255, 255, 255, 0.9) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

/* Hero Section */
.hero-section {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.min-vh-75 {
    min-height: 75vh;
}

.bg-gradient-primary {
    background: var(--gradient-primary) !important;
}

/* Hero Illustration */
.hero-illustration {
    position: relative;
    padding: 2rem;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 600;
    animation: float 3s ease-in-out infinite;
}

.floating-card:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-card:nth-child(2) {
    top: 60%;
    right: 20%;
    animation-delay: 1s;
}

.floating-card:nth-child(3) {
    bottom: 30%;
    left: 20%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Feature Cards */
.feature-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

/* Converter Cards */
.converter-card, .result-card, .multi-semester-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: none;
    overflow: hidden;
}

.converter-card .card-header, 
.result-card .card-header, 
.multi-semester-card .card-header {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 1.5rem;
}

.converter-card .card-body, 
.result-card .card-body, 
.multi-semester-card .card-body {
    padding: 2rem;
}

/* Quick Converter Cards */
.quick-converter-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.quick-converter-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Form Controls */
.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    transform: translateY(-2px);
}

.form-control-lg, .form-select-lg {
    padding: 1rem 1.25rem;
    font-size: 1.1rem;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::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: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.1rem;
}

/* Result Display */
.result-display {
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.result-item:hover {
    background: #e9ecef;
    transform: scale(1.02);
}

.result-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    display: block;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
}

.result-details {
    background: var(--light-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid #dee2e6;
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    font-weight: 600;
    color: var(--secondary-color);
}

.detail-value {
    font-weight: 500;
    color: var(--dark-color);
}

/* Formula Cards */
.formula-card, .formula-detail-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
    height: 100%;
}

.formula-card:hover, .formula-detail-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.formula-text {
    font-family: 'Courier New', monospace;
    background: var(--light-color);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    color: var(--dark-color);
    margin: 1rem 0;
}

.formula-display code {
    background: var(--light-color);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    display: block;
    text-align: center;
}

/* Info Cards */
.info-card, .tip-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    height: 100%;
    text-align: center;
}

.info-card:hover, .tip-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.info-icon {
    margin-bottom: 1rem;
}

/* Statistics Cards */
.stat-card {
    padding: 2rem;
    transition: var(--transition);
}

.stat-card:hover {
    transform: scale(1.05);
}

/* Step Cards */
.step-card {
    position: relative;
    padding: 2rem;
    transition: var(--transition);
}

.step-card:hover {
    transform: translateY(-10px);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
}

/* Contact Card */
.contact-card {
    background: var(--light-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

/* Multi-semester inputs */
.semester-input-row {
    background: var(--light-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

/* Accordion Styles */
.accordion-button {
    font-weight: 600;
    background: var(--light-color);
}

.accordion-button:not(.collapsed) {
    background: var(--primary-color);
    color: white;
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--primary-color);
}

/* Alert Styles */
.alert {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--shadow-sm);
}

/* Loading Animation */
.spinner-border {
    animation: spin 1s linear infinite;
}

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

/* Footer Styles */
footer {
    background: var(--dark-color) !important;
    margin-top: auto;
}

footer a:hover {
    color: var(--primary-color) !important;
    transition: var(--transition);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
    
    .hero-section {
        padding: 3rem 0;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .display-5 {
        font-size: 1.75rem;
    }
    
    .result-value {
        font-size: 2rem;
    }
    
    .floating-card {
        font-size: 0.8rem;
        padding: 0.25rem 0.5rem;
    }
    
    .feature-card, .converter-card, .result-card {
        margin-bottom: 1.5rem;
    }
    
    .btn-lg {
        padding: 0.5rem 1.5rem;
        font-size: 1rem;
    }
    
    .step-number {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-section .display-4 {
        font-size: 1.75rem;
    }
    
    .converter-card .card-body,
    .result-card .card-body {
        padding: 1.5rem;
    }
    
    .result-value {
        font-size: 1.75rem;
    }
    
    .detail-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
}

/* Force white background - Dark mode disabled */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #ffffff !important;
        color: #212529 !important;
    }
    
    .feature-card, .converter-card, .result-card, .quick-converter-card {
        background: #ffffff !important;
        color: #212529 !important;
    }
    
    .form-control, .form-select {
        background-color: #ffffff !important;
        border-color: #e9ecef !important;
        color: #212529 !important;
    }
}

/* Print Styles */
@media print {
    .navbar, footer, .btn {
        display: none !important;
    }
    
    .main-content {
        padding-top: 0;
    }
    
    .hero-section {
        background: white !important;
        color: black !important;
    }
    
    .feature-card, .converter-card, .result-card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
}

/* Accessibility Improvements */
.btn:focus, .form-control:focus, .form-select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* University Cards */
.university-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
    cursor: pointer;
    height: 100%;
}

.university-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.popular-card {
    border-left: 4px solid var(--primary-color);
}

.popular-card:hover {
    border-left-color: var(--success-color);
}

.state-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: var(--border-radius-lg);
}

.state-section h3 {
    border-bottom: 2px solid #dee2e6;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

/* Search Section */
.search-section .input-group {
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.search-section .form-control {
    border: none;
    padding: 1rem 1.5rem;
}

.search-section .input-group-text {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 1.5rem;
}

/* CTA Card */
.cta-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

/* Blog Cards */
.blog-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
    height: 100%;
}

.blog-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.featured-card {
    border-left: 4px solid var(--primary-color);
}

.blog-meta .badge {
    font-size: 0.75rem;
}

.blog-stats {
    font-size: 0.875rem;
}

.category-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
    height: 100%;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.newsletter-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Tool Cards */
.tool-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
    height: 100%;
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.featured-tool {
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
}

.tool-icon {
    margin-bottom: 1rem;
}

.tool-features .badge {
    margin: 0.125rem;
}

.tool-stats .stat-item {
    padding: 0.5rem;
}

.university-tool-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
    height: 100%;
}

.university-tool-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.apps-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.feature-item {
    padding: 1rem;
}

.resource-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
    height: 100%;
}

.resource-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Article Styles */
.article-content {
    line-height: 1.8;
    font-size: 1.1rem;
}

.article-content h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e9ecef;
}

.article-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.table-of-contents {
    background: #f8f9fa;
    border-left: 4px solid var(--primary-color);
}

.info-card, .feature-card, .method-card, .example-card, .tip-card, .comparison-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    height: 100%;
}

.formula-card {
    background: linear-gradient(135deg, #f8f9ff 0%, #e6f3ff 100%);
    border-radius: var(--border-radius);
    border: 1px solid #b3d9ff;
}

.formula-display {
    background: white;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
}

.pros-cons-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    height: 100%;
}

.related-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    transition: var(--transition);
}

.related-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.social-share button {
    margin: 0.25rem;
}

/* GPA Calculator Specific */
.calculator-card, .result-card, .settings-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
}

.reference-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    height: 100%;
}

.result-item {
    padding: 1rem;
}

.result-value {
    color: var(--primary-color);
}

.empty-state {
    color: #6c757d;
}

/* Basic Hover Effects */
.btn:hover {
    opacity: 0.9;
}

.card:hover, .feature-card:hover, .converter-card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.social-links a:hover {
    color: var(--primary-color) !important;
}

/* Loading States */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

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

/* Focus States for Accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    border-color: var(--primary-color);
}

/* Fix zoom and font sizes */
.display-4 {
    font-size: 2.5rem;
}

.display-5 {
    font-size: 1.75rem;
}

.lead {
    font-size: 1.1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .tool-card, .blog-card, .university-card {
        margin-bottom: 1rem;
    }
    
    .display-4 {
        font-size: 1.8rem;
    }
    
    .display-5 {
        font-size: 1.3rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }
}

/* Enhanced Form Styles */
.input-group .btn {
    border-left: none;
}

.input-group .form-control:focus + .btn {
    border-color: var(--primary-color);
}

.was-validated .form-control:valid,
.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 1.44 1.44L7.4 4.5l.94.94-3.68 3.68L2.3 6.73z'/%3e%3c/svg%3e");
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: var(--danger-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 2.4 2.4m0-2.4L5.8 7'/%3e%3c/svg%3e");
}

/* History Card Styles */
.history-card {
    background: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.history-card .card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 1px solid #dee2e6;
    padding: 1rem 1.5rem;
}

.history-item {
    background: #f8f9fa;
    transition: all 0.3s ease;
}

.history-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

/* Progress Bar Animation */
.progress-bar-animated {
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    0% {
        background-position-x: 1rem;
    }
}

/* Enhanced Result Display */
.result-display {
    animation: fadeInUp 0.5s ease-out;
}

.result-item {
    text-align: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.result-item:hover {
    background: #e9ecef;
    transform: translateY(-2px);
}

.result-label {
    font-size: 0.875rem;
    color: #6c757d;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 0.5rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f1f3f4;
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    font-weight: 600;
    color: #495057;
}

.detail-value {
    color: #212529;
}

/* Advanced Button Styles */
.btn-group-advanced {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-advanced {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-advanced:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

/* Loading States */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

/* Accessibility Improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* Focus Indicators */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .card, .btn, .form-control, .form-select {
        border-width: 2px;
    }
    
    .result-item {
        border: 2px solid #000;
    }
}

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

/* Print Styles */
@media print {
    .navbar, .footer, .btn, .social-links, .history-card {
        display: none !important;
    }
    
    .container {
        max-width: none !important;
    }
    
    .result-card, .calculator-card {
        border: 1px solid #dee2e6 !important;
        box-shadow: none !important;
    }
    
    .result-display {
        page-break-inside: avoid;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .feature-card, .converter-card, .result-card, .university-card {
        border: 2px solid var(--dark-color);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}