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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1.2rem;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.section-subtitle {
    font-size: 1.2rem;
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 4rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    font-weight: 400;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    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: left 0.5s ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.1);
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

/* Light mode scrolled header */
.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 1rem 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
}

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

.nav-link {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #667eea;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #667eea;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #2c3e50;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 140px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::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="%23ffffff" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="%23ffffff" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="%23ffffff" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 2rem;
    color: #2c3e50;
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

.highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.hero-description {
    font-size: 1.3rem;
    color: #7f8c8d;
    margin-bottom: 3rem;
    line-height: 1.7;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
}

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

.app-preview {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Features Section */
.features {
    padding: 100px 0;
    background: #fff;
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #e0e6ed, transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.feature-card {
    background: #fff;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid #f8f9fa;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.12);
    border-color: #e3f2fd;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.feature-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
    border-radius: 18px;
}

.feature-icon i {
    font-size: 1.8rem;
    color: white;
    position: relative;
    z-index: 1;
}

.feature-title {
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
    color: #2c3e50;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.feature-description {
    color: #7f8c8d;
    line-height: 1.7;
    font-size: 1rem;
    font-weight: 400;
}

/* Platforms Section */
.platforms {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.platforms::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #dee2e6, transparent);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

/* Browser Extensions Section */
.extensions {
    padding: 100px 0;
    background: #fff;
    position: relative;
}

.extensions::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #e0e6ed, transparent);
}

.extensions-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-bottom: 4rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.extension-item {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid #f8f9fa;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2.5rem;
    position: relative;
    overflow: hidden;
}

.extension-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.extension-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-color: #e3f2fd;
}

.extension-item:hover::before {
    transform: scaleY(1);
}

.extension-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
}

.extension-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.extension-icon i {
    font-size: 1.8rem;
    color: white;
}

.extension-details {
    flex: 1;
}

.extension-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    text-align: left;
}

.extension-description {
    color: #7f8c8d;
    margin-bottom: 0.75rem;
    line-height: 1.5;
    text-align: left;
    font-size: 0.95rem;
}

.extension-meta {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.extension-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: transform 0.3s ease;
    text-align: center;
    white-space: nowrap;
}

.extension-download:hover {
    transform: translateY(-2px);
    color: white;
}

/* Common Usage Guide */
.common-guide {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 3rem;
    color: white;
}

.guide-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    justify-content: space-between;
}

.guide-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.guide-icon i {
    font-size: 1.8rem;
    color: white;
}

.guide-text {
    flex: 1;
}

.guide-text h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: white;
}

.guide-text p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    line-height: 1.5;
}

.guide-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
}

.guide-button:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    transform: translateY(-2px);
}

/* Extension Overview */
.extension-overview {
    background: #f8f9fa;
    padding: 3rem;
    border-radius: 20px;
    margin-top: 2rem;
}

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

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

.overview-header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

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

.overview-item {
    text-align: center;
    padding: 1.5rem;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.overview-item:hover {
    transform: translateY(-5px);
}

.overview-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.overview-icon i {
    font-size: 1.5rem;
    color: white;
}

.overview-item h4 {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 0.75rem;
}

.overview-item p {
    color: #7f8c8d;
    line-height: 1.6;
    font-size: 0.9rem;
}

/* Guide Page Styles */
.guide-hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.guide-hero .hero-title,
.guide-hero .hero-description {
    color: white;
}

.guide-hero .highlight {
    color: #f0f0f0;
    -webkit-text-fill-color: #f0f0f0;
}

/* Quick Navigation */
.quick-nav {
    background: #fff;
    padding: 1rem 0;
    border-bottom: 1px solid #f0f0f0;
    position: sticky;
    top: 70px;
    z-index: 999;
}

.nav-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: #7f8c8d;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.nav-tab:hover,
.nav-tab.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* Guide Sections */
.guide-section {
    padding: 80px 0;
}

.guide-section:nth-child(even) {
    background: #f8f9fa;
}

/* Installation Steps */
.installation-steps {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.browser-installation {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #f0f0f0;
}

.browser-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f0f0f0;
}

.browser-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.browser-icon i {
    font-size: 2rem;
    color: white;
}

.browser-header h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin: 0;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.1rem;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: #7f8c8d;
    line-height: 1.6;
    margin: 0;
}

.step-content a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.step-content a:hover {
    text-decoration: underline;
}

.browser-actions {
    text-align: center;
}

/* Configuration Steps */
.configuration-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.config-step {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #f0f0f0;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.step-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon i {
    font-size: 1.5rem;
    color: white;
}

.step-header h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin: 0;
}

.step-content p {
    color: #7f8c8d;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.step-content ul {
    color: #7f8c8d;
    padding-left: 1.5rem;
}

.step-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Features Detailed */
.features-detailed {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.feature-detail {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: flex-start;
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #f0f0f0;
}

.feature-detail .feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-detail .feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-content h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.feature-content p {
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.feature-tips h4 {
    font-size: 1.1rem;
    color: #2c3e50;
    margin-bottom: 0.75rem;
}

.feature-tips ul {
    color: #7f8c8d;
    padding-left: 1.5rem;
}

.feature-tips li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Troubleshooting */
.troubleshooting-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.trouble-item {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #f0f0f0;
}

.trouble-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f0f0f0;
}

.trouble-header h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin: 0;
}

.trouble-tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.trouble-content p {
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.trouble-content ul {
    color: #7f8c8d;
    padding-left: 1.5rem;
}

.trouble-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Support Section */
.support-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
}

.support-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: white;
}

.support-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.support-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.support-actions .btn {
    min-width: 200px;
}

.platform-card {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    border: 1px solid #f0f0f0;
}

.platform-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.platform-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.platform-icon i {
    font-size: 2rem;
    color: white;
}

.platform-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.platform-description {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.platform-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.platform-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: transform 0.3s ease;
}

.platform-download:hover {
    transform: translateY(-2px);
}

/* Pricing Section */
.pricing {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.pricing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #dee2e6, transparent);
}

.pricing-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    max-width: 1100px;
    margin: 0 auto;
    margin-top: 2rem;
}

.pricing-card {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 2px solid #f0f0f0;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.pricing-card.featured {
    border-color: #667eea;
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
}

.pricing-title {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.pricing-price {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.pricing-period {
    font-size: 1rem;
    font-weight: 400;
    color: #7f8c8d;
}

.pricing-features {
    list-style: none;
    margin-bottom: 0;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: #7f8c8d;
}

.pricing-features i {
    color: #27ae60;
    font-size: 1.1rem;
}

/* About Section */
.about {
    padding: 100px 0;
    background: #fff;
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #e0e6ed, transparent);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    margin-top: 2rem;
}

.about-description {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.team-photo {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 80px 0 30px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-description {
    color: #bdc3c7;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: background 0.3s ease;
}

.social-link:hover {
    background: #667eea;
}

.footer-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #667eea;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: #bdc3c7;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: #667eea;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark light;
    }

    body {
        color: #e6e6e6;
        background-color: #0f1115;
    }

    .section-title { color: #e8edf2; }
    .section-subtitle { color: #aab2bd; }

    /* Header */
    .header { background: rgba(20, 22, 28, 0.85); }
    .header.scrolled { background: rgba(20, 22, 28, 0.92); box-shadow: 0 2px 20px rgba(0, 0, 0, 0.6); }
    .nav-link { color: #e8edf2; }
    .nav-link:hover { color: #9aa7ff; }
    .nav-link::after { background: #9aa7ff; }
    .bar { background: #e8edf2; }

    /* Hero */
    .hero {
        background: linear-gradient(135deg, #141821 0%, #1b2030 100%);
    }
    .hero-title { color: #e8edf2; }
    .hero-description { color: #aab2bd; }
    .highlight::after {
        background: linear-gradient(135deg, #8092ff 0%, #9a7bff 100%);
    }

    /* Cards and surfaces */
    .features,
    .extensions,
    .about { background: #0f1115; }

    .feature-card,
    .extension-item,
    .overview-item,
    .browser-installation,
    .config-step,
    .feature-detail,
    .trouble-item,
    .platform-card,
    .pricing-card {
        background: #171923;
        border-color: #222738;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    }

    .feature-title,
    .extension-title,
    .overview-header h3,
    .pricing-title,
    .about .section-title,
    .browser-header h3,
    .feature-content h3,
    .step-content h4 { color: #e8edf2; }

    .feature-description,
    .extension-description,
    .overview-header p,
    .overview-item p,
    .platform-description,
    .pricing-period,
    .about-description,
    .step-content p,
    .step-content ul,
    .trouble-content p,
    .trouble-content ul,
    .pricing-features li { color: #aab2bd; }

    .features::before,
    .extensions::before,
    .about::before,
    .platforms::before,
    .pricing::before,
    .browser-header,
    .trouble-header,
    .footer-bottom {
        background: linear-gradient(90deg, transparent, #222738, transparent);
        border-color: #222738;
    }

    /* Section backgrounds */
    .platforms,
    .pricing { background: linear-gradient(135deg, #12151d 0%, #171c28 100%); }
    .extension-overview { background: #0f1115; }

    /* Guide page specific dark mode */
    .quick-nav {
        background: #0f1115;
        border-bottom-color: #222738;
    }
    
    .nav-tab {
        color: #aab2bd;
    }
    
    .nav-tab:hover,
    .nav-tab.active {
        background: #5d6bff;
        color: #0f1115;
    }
    
    .guide-section:nth-child(even) {
        background: #12151d;
    }

    /* Buttons */
    .btn-secondary { color: #c8d0ff; border-color: #5d6bff; }
    .btn-secondary:hover { background: #5d6bff; color: #0f1115; }

    /* Gradient blocks remain brand-colored; adjust subtle text */
    .guide-hero .highlight { color: #ffffff; -webkit-text-fill-color: #ffffff; }

    /* Footer */
    .footer {
        background: linear-gradient(135deg, #0c0e13 0%, #121620 100%);
    }
    .footer-links a:hover { color: #9aa7ff; }
    .social-link:hover { background: #5d6bff; }
}