/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* SEO Accessibility Helper */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Enhanced mobile support */
html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Better touch targets for mobile */
button, .upload-card, .document-card, a {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    touch-action: manipulation;
}

/* Improved scrolling on mobile */
.modal-content, .upload-modal {
    -webkit-overflow-scrolling: touch;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav a:hover {
    opacity: 0.8;
}

/* Main Content */
.main {
    min-height: calc(100vh - 120px);
    padding: 2rem 0;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 2rem;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.hero p {
    font-size: 1.2rem;
    color: #6c757d;
    max-width: 600px;
    margin: 0 auto;
}

/* Upload Section */
.upload-section {
    margin-bottom: 3rem;
}

.upload-container {
    display: flex;
    justify-content: center;
}

.upload-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
    max-width: 400px;
    width: 100%;
}

.upload-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

.upload-icon {
    width: 80px;
    height: 80px;
    border: 3px dashed rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: all 0.3s ease;
}

.upload-card:hover .upload-icon {
    border-color: white;
    transform: scale(1.1);
}

.upload-icon i {
    font-size: 2rem;
    height: 40px;
}

.upload-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-card p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.upload-trigger-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 12px 25px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.upload-trigger-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: white;
    transform: translateY(-2px);
}

.upload-trigger-btn i {
    margin-right: 8px;
}

/* Search Section */
.search-section {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.search-container {
    margin-bottom: 2rem;
}

.search-box {
    display: flex;
    align-items: center;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 50px;
    padding: 10px 20px;
    transition: border-color 0.3s;
}

.search-box:focus-within {
    border-color: #3498db;
}

.search-box i {
    color: #6c757d;
    margin-right: 15px;
}

.search-box input {
    flex: 1;
    border: none;
    background: none;
    font-size: 1.1rem;
    padding: 10px;
    outline: none;
}

.search-btn {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
    min-height: 44px; /* Better touch targets */
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover {
    transform: translateY(-2px);
}

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

/* Filters */
.filters {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

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

.filter-group select {
    padding: 10px 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s;
}

.filter-group select:focus {
    outline: none;
    border-color: #3498db;
}

.clear-btn {
    background: #dc3545;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.clear-btn:hover {
    background: #c82333;
}

/* Results Section */
.results-section {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e9ecef;
}

.results-header h3 {
    color: #2c3e50;
    font-size: 1.5rem;
}

#resultsCount {
    color: #6c757d;
    font-weight: 500;
}

/* Loading Animation */
.loading {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.loading i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Results Container */
.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

/* Document Card */
.document-card {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
}

.document-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    border-color: #3498db;
}

.card-header {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.card-header .fa-cloud {
    color: #667eea;
    font-size: 1.2rem;
}

.sample-badge {
    background: #ff6b6b;
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.document-card h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.document-card p {
    color: #6c757d;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.document-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.tag {
    background: #3498db;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.tag.subject {
    background: #28a745;
}

.tag.type {
    background: #fd7e14;
}

.tag.year {
    background: #6f42c1;
}

.document-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #6c757d;
    font-size: 0.9rem;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.no-results h3 {
    margin-bottom: 0.5rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s;
    position: relative;
}

.modal-header {
    padding: 2rem 2rem 1rem;
    border-bottom: 2px solid #e9ecef;
}

.modal-header h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.modal-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.modal-body {
    padding: 2rem;
}

.modal-body p {
    color: #6c757d;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.modal-actions {
    display: flex;
    gap: 15px;
}

.download-btn, .view-btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.download-btn {
    background: #28a745;
    color: white;
}

.download-btn:hover {
    background: #218838;
}

.view-btn {
    background: #007bff;
    color: white;
}

.view-btn:hover {
    background: #0056b3;
}

.close, .close-upload {
    color: #6c757d;
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    padding: 10px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.close:hover, .close-upload:hover {
    color: #2c3e50;
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 2rem 0;
    margin-top: 2rem;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 0.8;
}

/* Footer social/contact icons */
.footer-support .icon-links {
    display: inline-flex;
    gap: 14px;
    align-items: center;
    margin-right: 10px;
}

.footer-support .icon-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    text-decoration: none;
    background: transparent;
    transition: transform 0.15s ease, background-color 0.15s ease;
}

.footer-support .icon-links i {
    font-size: 28px; /* Make the glyph large */
    line-height: 1;
}

/* Original brand colors */
.footer-support .icon-links a.email i { color: #EA4335; }
.footer-support .icon-links a.whatsapp i { color: #25D366; }

.footer-support .icon-links a:hover,
.footer-support .icon-links a:focus {
    transform: translateY(-1px);
    background-color: rgba(255,255,255,0.08);
    outline: none;
}

.clear-storage-btn {
    background: none;
    border: 1px solid rgba(255,255,255,0.5);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.clear-storage-btn:hover {
    background: #ff4757;
    border-color: #ff4757;
    color: white;
}

/* Upload Modal Styles */
.upload-modal {
    max-width: 800px;
    width: 90%;
    max-height: 95vh;
    margin: 2.5vh auto;
    overflow-y: auto;
    position: relative;
}

.upload-form {
    display: block;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-group label i {
    margin-right: 8px;
    color: #3498db;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: white;
    min-height: 44px; /* Better touch targets */
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Upload Info Section */
.info-section {
    margin-bottom: 2rem;
}

.upload-info {
    border: 2px solid #e3f2fd;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
}

.upload-info i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 1rem;
    display: block;
}

.upload-info h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.upload-info p {
    font-size: 1rem;
    color: #555;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.upload-info small {
    color: #3498db;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.file-info.show {
    display: block;
}

.file-info i {
    color: #28a745;
    margin-right: 8px;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #e9ecef;
}

.cancel-btn {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid #dc3545;
    background: white;
    color: #dc3545;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.cancel-btn:hover {
    background: #dc3545;
    color: white;
}

.submit-btn {
    flex: 2;
    padding: 12px 20px;
    border: none;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.3);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Upload Progress */
.upload-progress {
    text-align: center;
    padding: 2rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    width: 0%;
    transition: width 0.3s ease;
    animation: progressAnimation 2s infinite;
}

@keyframes progressAnimation {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* Upload Success */
.upload-success {
    text-align: center;
    padding: 3rem 2rem;
}

.upload-success i {
    font-size: 4rem;
    color: #28a745;
    margin-bottom: 1rem;
}

.upload-success h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.upload-success p {
    color: #6c757d;
    margin-bottom: 2rem;
}

/* Feedback Modal */
.feedback-modal {
    max-width: 720px;
    width: 92%;
    max-height: 95vh;
    margin: 3vh auto;
    overflow-y: auto;
}

.feedback-modal .modal-header h3 i {
    color: #badaef;
    margin-right: 8px;
}

.feedback-modal .modal-body {
    padding-bottom: 2rem;
}

@media (max-width: 768px) {
    .feedback-modal {
        width: 95%;
        margin: 2vh auto;
    }
}

.close-success-btn {
    background: #28a745;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.close-success-btn:hover {
    background: #218838;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Responsive Design */

/* Large Screens - Desktop optimizations */
@media (min-width: 1440px) {
    .upload-modal {
        max-width: 1000px;
        width: 75%;
        margin: 4vh auto;
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .modal-header {
        padding: 3rem 3rem 2rem;
    }
    
    .modal-body {
        padding: 2rem 3rem 3rem;
    }
}

/* Laptop Screens - Standard laptop optimization */
@media (min-width: 1025px) and (max-width: 1439px) {
    .upload-modal {
        max-width: 850px;
        width: 80%;
        margin: 3vh auto;
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
        gap: 25px;
    }
    
    .modal-header {
        padding: 2.5rem 2.5rem 1.5rem;
    }
    
    .modal-body {
        padding: 2rem 2.5rem 2.5rem;
    }
    
    .file-upload-area {
        padding: 2.5rem 2rem;
    }
}

/* Tablet and Small Desktop */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .hero h2 {
        font-size: 2.2rem;
    }
    
    .upload-card {
        max-width: 350px;
    }
    
    .results-container {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    
    .filters {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    /* Upload modal for medium screens */
    .upload-modal {
        max-width: 700px;
        width: 85%;
        margin: 2vh auto;
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
}

/* Small Laptops and Large Tablets */
@media (min-width: 769px) and (max-width: 1024px) {
    .upload-modal {
        max-width: 720px;
        width: 85%;
        margin: 2vh auto;
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
        gap: 18px;
    }
    
    .modal-header {
        padding: 2rem 2rem 1.2rem;
    }
    
    .modal-body {
        padding: 1.5rem 2rem 2rem;
    }
    
    .file-upload-area {
        padding: 2rem 1.5rem;
    }
    
    .form-actions {
        flex-direction: row;
        gap: 15px;
    }
    
    .cancel-btn, .submit-btn {
        padding: 12px 20px;
        font-size: 1rem;
    }
}

/* Mobile Landscape and Small Tablets */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    /* Header Responsive */
    .header {
        padding: 0.8rem 0;
    }
    
    .header .container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
    
    .nav {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav a {
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
        border-radius: 20px;
        background: rgba(255, 255, 255, 0.1);
    }
    
    /* Hero Section Responsive */
    .hero {
        margin-bottom: 1.5rem;
        padding: 1rem 0;
    }
    
    .hero h2 {
        font-size: 1.8rem;
        margin-bottom: 0.8rem;
    }
    
    .hero p {
        font-size: 1rem;
        padding: 0 1rem;
    }
    
    /* Upload Section Responsive */
    .upload-section {
        margin-bottom: 2rem;
    }
    
    .upload-card {
        padding: 1.5rem 1rem;
        margin: 0 1rem;
    }
    
    .upload-icon {
        width: 50px;
        height: 50px;
        margin-bottom: 1rem;
    }
    
    .upload-icon i {
        font-size: 1.2rem;
        height: 50px;
    }
    
    .upload-card h3 {
        font-size: 1.2rem;
    }
    
    .upload-card p {
        font-size: 0.9rem;
    }
    
    .upload-trigger-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    /* Search Section Responsive */
    .search-section {
        padding: 1.5rem;
        margin: 0 0.5rem 1.5rem;
    }
    
    .search-box {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
        border-radius: 15px;
    }
    
    .search-box input {
        text-align: center;
        font-size: 1rem;
        padding: 12px;
    }
    
    .search-btn {
        padding: 12px 20px;
        border-radius: 15px;
        font-size: 1rem;
    }
    
    /* Filters Responsive */
    .filters {
        flex-direction: column;
        gap: 12px;
        margin-top: 1.5rem;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .filter-group label {
        font-size: 0.9rem;
        margin-bottom: 0.3rem;
    }
    
    .filter-group select {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
    
    .clear-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
        margin-top: 0.5rem;
    }
    
    /* Results Section Responsive */
    .results-section {
        padding: 1.5rem;
        margin: 0 0.5rem;
    }
    
    .results-header {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
        margin-bottom: 1.5rem;
    }
    
    .results-header h3 {
        font-size: 1.3rem;
    }
    
    .results-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    /* Document Cards Responsive */
    .document-card {
        padding: 1.2rem;
        border-radius: 10px;
    }
    
    .document-card h4 {
        font-size: 1.1rem;
        line-height: 1.3;
    }
    
    .document-card p {
        font-size: 0.9rem;
        line-height: 1.4;
    }
    
    .document-tags {
        gap: 6px;
        margin-bottom: 0.8rem;
    }
    
    .tag {
        font-size: 0.75rem;
        padding: 3px 8px;
    }
    
    .document-meta {
        font-size: 0.8rem;
        flex-direction: column;
        gap: 0.3rem;
        text-align: center;
    }
    
    /* Modal Responsive */
    .modal-content {
        width: 95%;
        margin: 5% auto;
        max-height: 85vh;
        overflow-y: auto;
    }
    
    .modal-header {
        padding: 1.5rem 1.5rem 1rem;
    }
    
    .modal-header h3 {
        font-size: 1.2rem;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
    
    .modal-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .download-btn, .view-btn {
        padding: 12px 15px;
        font-size: 0.9rem;
    }
    
    /* Upload Modal Responsive */
    .upload-modal {
        width: 95%;
        margin: 1% auto;
        max-height: 95vh;
        overflow-y: auto;
        border-radius: 12px;
    }
    
    .upload-modal .modal-header {
        padding: 1rem 1.2rem 0.8rem;
    }
    
    .upload-modal .modal-header h3 {
        font-size: 1.1rem;
    }
    
    .upload-modal .modal-header p {
        font-size: 0.9rem;
    }
    
    .upload-modal .modal-body {
        padding: 1rem 1.2rem 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .form-group {
        margin-bottom: 1.2rem;
    }
    
    .form-group label {
        font-size: 0.9rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 12px;
        margin-top: 1.5rem;
        padding-top: 1.5rem;
    }
    
    .cancel-btn, .submit-btn {
        padding: 12px 15px;
        font-size: 0.9rem;
    }
    
    .file-upload-area {
        padding: 1.2rem 0.8rem;
    }
    
    .file-upload-area i {
        font-size: 2rem;
    }
    
    .file-upload-area p {
        font-size: 1rem;
    }
    
    .file-upload-area small {
        font-size: 0.8rem;
    }
    
    /* Footer Responsive */
    .footer {
        padding: 1.5rem 0;
        margin-top: 1.5rem;
    }
    
    .footer .container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer-links {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .footer-links a {
        font-size: 0.9rem;
    }
}

/* Mobile Portrait */
@media (max-width: 480px) {
    .container {
        padding: 0 8px;
    }
    
    /* Even smaller adjustments for small phones */
    .hero h2 {
        font-size: 1.6rem;
    }
    
    .hero p {
        font-size: 0.9rem;
    }
    
    .upload-card {
        padding: 1.2rem 0.8rem;
        margin: 0 0.5rem;
    }
    
    .upload-card h3 {
        font-size: 1.1rem;
    }
    
    .upload-trigger-btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
    
    .search-section,
    .results-section {
        padding: 1rem;
        margin: 0 0.3rem 1rem;
    }
    
    .search-box {
        padding: 12px;
    }
    
    .search-box input {
        font-size: 0.9rem;
        padding: 10px;
    }
    
    .search-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .document-card {
        padding: 1rem;
    }
    
    .document-card h4 {
        font-size: 1rem;
    }
    
    .document-card p {
        font-size: 0.85rem;
    }
    
    .tag {
        font-size: 0.7rem;
        padding: 2px 6px;
    }
    
    .modal-content {
        width: 98%;
        margin: 1% auto;
    }
    
    .upload-modal {
        width: 98%;
        margin: 1% auto;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 8px 10px;
        font-size: 0.85rem;
    }
    
    .file-upload-area {
        padding: 1rem 0.5rem;
    }
    
    .file-upload-area i {
        font-size: 1.8rem;
    }
    
    .nav {
        gap: 10px;
    }
    
    .nav a {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
}

/* Very Small Screens */
@media (max-width: 320px) {
    .hero h2 {
        font-size: 1.4rem;
    }
    
    .upload-card {
        padding: 1rem 0.6rem;
    }
    
    .upload-icon {
        width: 40px;
        height: 40px;
    }
    
    .upload-icon i {
        font-size: 1rem;
    }
    
    .search-section,
    .results-section {
        padding: 0.8rem;
        margin: 0 0.2rem 0.8rem;
    }
    
    .document-card {
        padding: 0.8rem;
    }
}

/* Additional Mobile Utilities */

/* Prevent zoom on input focus for iOS */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
    select,
    textarea,
    input[type="text"],
    input[type="password"],
    input[type="datetime"],
    input[type="datetime-local"],
    input[type="date"],
    input[type="month"],
    input[type="time"],
    input[type="week"],
    input[type="number"],
    input[type="email"],
    input[type="url"],
    input[type="search"],
    input[type="tel"],
    input[type="color"] {
        font-size: 16px;
    }
}

/* Hide scrollbars but keep functionality */
.modal-content::-webkit-scrollbar,
.upload-modal::-webkit-scrollbar {
    width: 0px;
    background: transparent;
}

/* Better focus states for accessibility */
button:focus,
input:focus,
select:focus,
textarea:focus,
.document-card:focus,
.upload-card:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

/* Smooth scrolling for anchor links */
html {
    scroll-behavior: smooth;
}

/* Loading animation improvements for mobile */
.loading {
    padding: 2rem 1rem;
}

.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Better text selection */
::selection {
    background-color: rgba(52, 152, 219, 0.3);
}

::-moz-selection {
    background-color: rgba(52, 152, 219, 0.3);
}

/* Mobile-first image optimization */
img {
    max-width: 100%;
    height: auto;
}

/* Prevent horizontal scroll */
body, html {
    overflow-x: hidden;
    width: 100%;
}

/* Better mobile typography */
@media (max-width: 768px) {
    /* Improve readability on small screens */
    p, li, span {
        line-height: 1.5;
        word-wrap: break-word;
        hyphens: auto;
    }
    
    /* Better spacing for touch */
    .nav a {
        margin: 0.2rem;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Ensure modals don't go off-screen */
    .modal {
        padding: 10px;
    }
    
    /* Better file upload area for mobile */
    .file-upload-area {
        min-height: 120px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    
    /* Improved button spacing */
    .modal-actions button,
    .form-actions button {
        min-height: 48px;
        font-size: 1rem;
        border-radius: 8px;
    }
    
    /* Better tag spacing */
    .document-tags,
    .modal-tags {
        line-height: 1.8;
    }
    
    /* Improved filter spacing */
    .filters {
        padding: 0 0.5rem;
    }
    
    /* Better error/success message display */
    .upload-success,
    .upload-progress {
        padding: 2rem 1rem;
        text-align: center;
    }
}
/* About Page Styles */
.about-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0 80px;
    text-align: center;
    margin-top: 80px;
}

.about-hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
    line-height: 1.6;
}

.mission-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.mission-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.mission-content h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    color: #333;
    display: flex;
    align-items: center;
    gap: 15px;
}

.mission-content h2 i {
    color: #667eea;
}

.mission-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
}

.mission-image {
    text-align: center;
}

.mission-image i {
    font-size: 8rem;
    color: #667eea;
    opacity: 0.8;
}