:root {
    --primary-color: #667eea;
    --primary-hover: #5568d3;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #4ade80;
    --warning-color: #fbbf24;
    --danger-color: #ef4444;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #4ade80 0%, #10b981 100%);
    --gradient-orange: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-secondary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

.header.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

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

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

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

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

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

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

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

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Hero Section */
.hero {
    background: var(--gradient-primary);
    color: white;
    padding: 6rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badges {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-block;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-illustration {
    width: 100%;
    max-width: 500px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
}

/* Version Switcher */
.version-switcher {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem;
    border-radius: 1rem;
    backdrop-filter: blur(10px);
}

.version-btn {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.version-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.version-btn.active {
    background: white;
    color: var(--primary-color);
    border-color: white;
    box-shadow: var(--shadow-lg);
}

.version-label {
    font-size: 0.75rem;
    opacity: 0.8;
}

.version-btn.active .version-label {
    opacity: 1;
    color: var(--text-light);
}

/* Version Content */
.version-content {
    display: none;
}

.version-content.active {
    display: block;
}

/* Stats Section */
.stats {
    padding: 4rem 0;
    background: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    border-radius: 1rem;
    background: var(--bg-secondary);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 1rem;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

/* Download Section */
.download {
    padding: 6rem 0;
    background: white;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.download-card {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

.download-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

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

.download-size {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.download-version {
    background: var(--gradient-success);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 1rem;
}

.download-version.beta {
    background: var(--gradient-orange);
}

.download-version.alpha {
    background: linear-gradient(135deg, #f59e0b 0%, #dc2626 100%);
}

/* Info Block */
.info-block {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border: 2px solid #3b82f6;
    border-radius: 1rem;
    padding: 2rem;
    margin-top: 3rem;
}

.info-block h3 {
    color: #1e3a8a;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-block ol {
    color: #1e40af;
    margin: 0;
    padding-left: 1.5rem;
}

.info-block li {
    margin-bottom: 0.5rem;
}

/* System Requirements */
.requirements {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

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

.requirement-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
}

.requirement-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.requirement-list {
    list-style: none;
}

.requirement-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

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

/* FAQ Section */
.faq {
    padding: 6rem 0;
    background: white;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-secondary);
    border-radius: 1rem;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: rgba(102, 126, 234, 0.1);
}

.faq-toggle {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(180deg);
}

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-content {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1.5rem;
    text-align: center;
}

.footer-content {
    margin-bottom: 2rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-copyright {
    opacity: 0.6;
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .nav-menu {
        display: none;
    }

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

    .version-switcher {
        flex-direction: column;
    }

    .version-btn {
        min-width: 100%;
    }
}

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

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* Screenshots Section */
.screenshots {
    padding: 6rem 0;
    background: white;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.screenshot-card {
    background: var(--bg-secondary);
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

.screenshot-img {
    width: 100%;
    height: auto;
    display: block;
    border-bottom: 2px solid var(--border-color);
}

.screenshot-card h3 {
    padding: 1rem 1.5rem 0.5rem;
    font-size: 1.25rem;
    color: var(--text-color);
}

.screenshot-card p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Comparison Section */
.comparison {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: 4rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

.comparison-table {
    width: 100%;
    background: white;
    border-collapse: collapse;
    border-radius: 1rem;
    overflow: hidden;
}

.comparison-table thead {
    background: var(--gradient-primary);
}

.comparison-table th {
    padding: 1.5rem 1rem;
    text-align: left;
    font-weight: 600;
    color: white;
    font-size: 1rem;
}

.comparison-table td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:hover {
    background: var(--bg-secondary);
}

.highlight-col {
    background: rgba(102, 126, 234, 0.1) !important;
    font-weight: 600;
}

.logo-mini {
    font-size: 1.25rem;
    margin-right: 0.5rem;
}

.check {
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

.cross {
    color: var(--danger-color);
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

.neutral {
    color: var(--warning-color);
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

/* Competitors Cards */
.competitors-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.competitor-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

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

.competitor-icon {
    font-size: 2.5rem;
}

.competitor-header h3 {
    flex: 1;
    font-size: 1.75rem;
    margin: 0;
}

.competitor-badge {
    padding: 0.35rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.competitor-badge.legacy {
    background: #fbbf24;
    color: #78350f;
}

.competitor-badge.modern {
    background: #4ade80;
    color: #14532d;
}

.competitor-badge.experimental {
    background: #f472b6;
    color: #831843;
}

.competitor-description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.competitor-pros,
.competitor-cons {
    margin-bottom: 1rem;
}

.competitor-pros strong {
    color: var(--success-color);
}

.competitor-cons strong {
    color: var(--danger-color);
}

.competitor-pros ul,
.competitor-cons ul {
    margin: 0.5rem 0 0 1rem;
    padding: 0;
}

.competitor-pros li,
.competitor-cons li {
    margin: 0.35rem 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Comparison Conclusion */
.comparison-conclusion {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 3rem;
    border-radius: 1rem;
    color: white;
    text-align: center;
}

.comparison-conclusion h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.comparison-conclusion p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.conclusion-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.conclusion-stat {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.conclusion-stat .stat-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.5rem;
}

.conclusion-stat strong {
    display: block;
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.conclusion-stat small {
    display: block;
    opacity: 0.8;
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .screenshots-grid {
        grid-template-columns: 1fr;
    }

    .comparison-table-wrapper {
        font-size: 0.85rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem 0.5rem;
    }

    .competitors-cards {
        grid-template-columns: 1fr;
    }

    .conclusion-stats {
        grid-template-columns: 1fr;
    }
}