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

/* Screen Reader Only Class for SEO and Accessibility */
.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;
}

:root {
    /* Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #4facfe;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --error-color: #e74c3c;
    
    --text-dark: #2c3e50;
    --text-medium: #5a6c7d;
    --text-light: #95a5a6;
    --text-white: #ffffff;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #2c3e50;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-primary);
    overflow-x: hidden;
}

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

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo i {
    font-size: 1.8rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 25px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    min-height: 100dvh; /* Dynamic viewport height for modern browsers */
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
    padding: 2rem 0;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(45deg, #f093fb, #f5576c, #4facfe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(90deg); }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    font-weight: 400;
}

/* Search Container */
.search-container {
    max-width: 600px;
    margin: 0 auto;
}

.search-wrapper {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: 8px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.search-wrapper:focus-within {
    transform: translateY(-2px);
    box-shadow: 0 25px 80px rgba(0,0,0,0.2);
}

.search-icon {
    color: var(--text-light);
    margin-left: 20px;
    font-size: 1.2rem;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    padding: 18px 20px;
    font-size: 1.1rem;
    background: transparent;
    color: var(--text-dark);
}

.search-input::placeholder {
    color: var(--text-light);
}

.search-btn {
    background: var(--primary-gradient);
    border: none;
    padding: 15px 25px;
    border-radius: var(--border-radius);
    color: var(--text-white);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.quick-tags {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.tags-label {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.tag {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-white);
    border: none;
    padding: 7px 15px; /* Slightly uneven */
    border-radius: 22px; /* Not perfectly round */
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
    margin: 0 6px 0 8px; /* Uneven margins */
}

.tag:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Hero Animation */
.hero-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 60px;
    height: 60px;
    top: 60%;
    right: 20%;
    animation-delay: 2s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

.shape-4 {
    width: 40px;
    height: 40px;
    top: 30%;
    right: 10%;
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

/* Disclaimer Banner */
.disclaimer-banner {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 1rem 0;
    border-top: 1px solid #dee2e6;
    border-bottom: 1px solid #dee2e6;
}

.disclaimer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1rem;
}

.disclaimer-icon {
    color: #ffc107;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.disclaimer-text {
    color: #495057;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    line-height: 1.5;
}

.disclaimer-text strong {
    font-weight: 700;
}

/* Section Styles */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-medium);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Results Section */
.results-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.results-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-dark);
}

.results-count {
    color: var(--text-medium);
    font-size: 1.1rem;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(345px, 1fr)); /* Slightly off */
    gap: 1.4rem; /* Not perfectly even */
}

/* Popular Section */
.popular-section {
    padding: 80px 0;
    background: var(--bg-primary);
}

.documents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); /* Slightly different */
    gap: 1.6rem; /* Different spacing */
}

/* Document Card */
.document-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.document-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.document-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.document-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.document-info p {
    color: var(--text-medium);
    font-size: 0.9rem;
}

.document-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: var(--text-light);
}

.document-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: 1rem;
}

.btn {
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: none;
    font-size: 0.9rem;
    line-height: 1.4;
    min-height: 44px;
    box-sizing: border-box;
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-white);
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-medium);
    border: 1px solid rgba(0,0,0,0.1);
}

.btn-secondary:hover {
    background: var(--bg-primary);
    color: var(--text-dark);
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--text-white);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-description {
    color: var(--text-medium);
    line-height: 1.6;
}

/* Categories Section */
.categories-section {
    padding: 80px 0;
    background: var(--bg-primary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px solid transparent;
    transition: var(--transition);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.category-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.category-description {
    color: var(--text-medium);
    margin-bottom: 1rem;
}

.category-stats {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Help Section */
.help-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.help-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.help-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--text-white);
}

.help-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.help-list {
    list-style: none;
    padding: 0;
}

.help-list li {
    padding: 0.5rem 0;
    color: var(--text-medium);
    position: relative;
    padding-left: 1.5rem;
}

.help-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.help-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-top: 1rem;
    transition: var(--transition);
}

.help-link:hover {
    color: var(--secondary-color);
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--primary-color);
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-white);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.loading-content {
    text-align: center;
    color: var(--text-white);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

.loading-text {
    font-size: 1.1rem;
    font-weight: 500;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero {
        min-height: calc(100vh - 70px);
        min-height: calc(100dvh - 70px);
        padding: 3rem 0;
    }

    .hero-container {
        padding: 0 15px;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-title {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }

    .search-wrapper {
        flex-direction: column;
        gap: 10px;
    }

    .search-input {
        padding: 15px;
    }

    .search-btn {
        width: 100%;
        justify-content: center;
    }

    .quick-tags {
        justify-content: center;
    }

    .features-grid,
    .categories-grid,
    .help-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .results-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .disclaimer-content {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .disclaimer-text {
        font-size: 0.9rem;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: calc(100vh - 70px);
        min-height: calc(100dvh - 70px);
        padding: 2rem 0;
    }

    .hero-container {
        padding: 0 10px;
    }

    .hero-title {
        font-size: 2rem;
        line-height: 1.1;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
        line-height: 1.4;
    }

    .search-container {
        margin-bottom: 1.5rem;
    }

    .hero-animation .floating-shape {
        display: none;
    }

    .documents-grid,
    .results-grid {
        grid-template-columns: 1fr;
    }

    .document-actions {
        flex-direction: column;
    }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --text-dark: #000000;
        --text-medium: #333333;
        --bg-primary: #ffffff;
        --bg-secondary: #f0f0f0;
    }
}