/* File Converter Pro - Complete Stylesheet */

:root {
    /* Color Variables */
    --primary: #33808D;
    --primary-dark: #2a6b75;
    --secondary: #f8f9fa;
    --accent: #ff6b6b;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --background: #ffffff;
    --surface: #f8f9fa;
    --border: #e9ecef;
    --shadow: rgba(0,0,0,0.1);
    --success: #28a745;
    --warning: #ffc107;
    --error: #dc3545;

    /* Dark mode colors */
    --bg-dark: #1a1a1a;
    --surface-dark: #2d2d2d;
    --text-dark: #ffffff;
    --border-dark: #404040;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    transition: all 0.3s ease;
}

body.dark {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

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

/* Header Styles */
.header {
    background: var(--background);
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.dark .header {
    background: var(--surface-dark);
    border-bottom: 1px solid var(--border-dark);
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--primary);
}

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

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.dark .nav-link {
    color: var(--text-dark);
}

.nav-link:hover {
    color: var(--primary);
}

.nav-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.theme-toggle, .mobile-menu-btn {
    background: none;
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.dark .theme-toggle, 
.dark .mobile-menu-btn {
    border-color: var(--border-dark);
    color: var(--text-dark);
}

.mobile-menu-btn {
    display: none;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.hero-subtitle-hindi {
    font-size: 1.1rem;
    opacity: 0.8;
    font-style: italic;
}

/* Page System */
.page {
    display: none;
    min-height: 70vh;
    padding: 2rem 0;
}

.page.active {
    display: block;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.page-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Converter Categories */
.converter-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.category-card {
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px var(--shadow);
}

.dark .category-card {
    background: var(--surface-dark);
    border-color: var(--border-dark);
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 8px 25px var(--shadow);
}

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

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Features Section */
.features-section {
    margin: 4rem 0;
    text-align: center;
}

.features-section h2 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
    color: var(--primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-item {
    padding: 1.5rem;
    background: var(--surface);
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.dark .feature-item {
    background: var(--surface-dark);
}

.feature-item:hover {
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

/* Converter Interface */
.converter-interface {
    max-width: 800px;
    margin: 0 auto;
}

.upload-area {
    border: 3px dashed var(--border);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    background: var(--surface);
    cursor: pointer;
}

.dark .upload-area {
    background: var(--surface-dark);
    border-color: var(--border-dark);
}

.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(51, 128, 141, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.upload-content p {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.upload-formats {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.conversion-options {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.conversion-options label {
    font-weight: 600;
    color: var(--text-primary);
}

.dark .conversion-options label {
    color: var(--text-dark);
}

.conversion-options select {
    padding: 10px 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: var(--background);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
}

.dark .conversion-options select {
    background: var(--surface-dark);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

.convert-btn {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.convert-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

/* File Queue */
.file-queue {
    margin: 2rem 0;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 10px;
}

.dark .file-item {
    background: var(--surface-dark);
    border-color: var(--border-dark);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-icon {
    font-size: 1.5rem;
}

.file-details h4 {
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.dark .file-details h4 {
    color: var(--text-dark);
}

.file-details p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.file-action-btn {
    padding: 5px 10px;
    border: 1px solid var(--border);
    background: var(--background);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.dark .file-action-btn {
    background: var(--surface-dark);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

.file-action-btn:hover {
    background: var(--primary);
    color: white;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s ease;
}

/* FAQ Styles */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    background: var(--surface);
}

.dark .faq-item {
    background: var(--surface-dark);
    border-color: var(--border-dark);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: rgba(51, 128, 141, 0.1);
}

.faq-question h3 {
    margin: 0;
    color: var(--text-primary);
}

.dark .faq-question h3 {
    color: var(--text-dark);
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem 1.5rem;
    max-height: 500px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Policy Content */
.policy-content, .about-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.policy-content h2, .about-content h2 {
    color: var(--primary);
    margin: 2rem 0 1rem 0;
}

.policy-content p, .about-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.about-content ul {
    list-style: none;
    padding-left: 0;
}

.about-content li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--surface);
    margin-top: 4rem;
    padding: 3rem 0 1rem 0;
    border-top: 1px solid var(--border);
}

.dark .footer {
    background: var(--surface-dark);
    border-color: var(--border-dark);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3, .footer-section h4 {
    color: var(--primary);
    margin-bottom: 1rem;
}

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

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

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
}

.dark .footer-bottom {
    border-color: var(--border-dark);
}

/* Ad Container */
.ad-container {
    text-align: center;
    margin: 2rem 0;
    padding: 1rem;
    background: var(--surface);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.dark .ad-container {
    background: var(--surface-dark);
    border-color: var(--border-dark);
}

/* Notification System */
#notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.notification {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    margin-bottom: 10px;
    box-shadow: 0 4px 12px var(--shadow);
    transform: translateX(400px);
    transition: all 0.3s ease;
    max-width: 350px;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-left: 4px solid var(--success);
}

.notification.error {
    border-left: 4px solid var(--error);
}

.notification.warning {
    border-left: 4px solid var(--warning);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .converter-categories {
        grid-template-columns: 1fr;
    }

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

    .conversion-options {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .upload-area {
        padding: 2rem 1rem;
    }

    .container {
        padding: 0 15px;
    }

    .file-item {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .file-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .category-card {
        padding: 1.5rem;
    }

    .upload-area {
        padding: 1.5rem 1rem;
    }
}

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

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top: 2px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Utility Classes */
.text-center { text-align: center; }
.hidden { display: none; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }