:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --dark-bg: #0f172a;
    --dark-surface: #1e293b;
    --dark-border: #334155;
    --light-bg: #ffffff;
    --light-surface: #f8fafc;
    --light-border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--light-bg);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--light-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--warning-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-download {
    background: var(--success-color);
    color: white;
    width: 100%;
    justify-content: center;
}

.btn-download:hover {
    background: #059669;
    transform: translateY(-2px);
}

.version-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    width: 100%;
    max-width: 500px;
}

.card-header {
    background: var(--dark-surface);
    color: white;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.window-controls {
    display: flex;
    gap: 0.5rem;
}

.window-controls span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ff5f57;
}

.window-controls span:nth-child(2) {
    background: #ffbd2e;
}

.window-controls span:nth-child(3) {
    background: #28ca42;
}

.card-title {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
}

.card-content {
    padding: 1.5rem;
    background: #1e293b;
    color: #e2e8f0;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
    position: relative;
}

.code-line {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    position: relative;
}

.line-number {
    color: #64748b;
    margin-right: 1rem;
    width: 2rem;
    text-align: right;
}

.code {
    color: #e2e8f0;
}

.codelens {
    margin-left: auto;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.risk-highlight {
    margin-top: 1rem;
    padding: 0.75rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #fca5a5;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: white;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--light-surface);
    border-radius: 12px;
    border: 1px solid var(--light-border);
    transition: all 0.3s ease;
    position: relative;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

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

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.feature-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.feature-card ul li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.feature-card ul li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

.feature-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--warning-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Requirements Section */
.requirements {
    padding: 60px 0;
    background: var(--dark-bg);
    color: white;
}

.requirements-content {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.req-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.req-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.req-info p {
    color: #94a3b8;
    margin-bottom: 1.5rem;
}

.docker-command {
    background: var(--dark-surface);
    color: #10b981;
    padding: 1rem;
    border-radius: 6px;
    font-family: 'Monaco', 'Menlo', monospace;
    display: block;
    margin-bottom: 1rem;
    border: 1px solid var(--dark-border);
}

.warning {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--warning-color);
    font-weight: 500;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: var(--light-surface);
}

.download-content {
    text-align: center;
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.download-content > p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.download-options {
    display: flex;
    justify-content: center;
    margin-bottom: 4rem;
}

.download-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--light-border);
    min-width: 300px;
}

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

.download-header i {
    color: var(--success-color);
    font-size: 1.5rem;
}

.download-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.download-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.version {
    font-weight: 600;
    color: var(--primary-color);
}

.date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.installation-steps {
    text-align: left;
    max-width: 800px;
    margin: 0 auto;
}

.installation-steps h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    text-align: center;
}

.steps {
    display: grid;
    gap: 2rem;
}

.step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

.step-content code {
    background: var(--light-surface);
    color: var(--primary-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
}

/* Changelog Section */
.changelog {
    padding: 80px 0;
    background: white;
}

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

.changelog-item {
    background: var(--light-surface);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--light-border);
}

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

.version-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.875rem;
}

.version-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.changelog-details h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.changelog-details ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.changelog-details ul li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.changelog-details ul li:before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

.changelog-note {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--warning-color);
    background: rgba(245, 158, 11, 0.1);
    padding: 0.75rem;
    border-radius: 6px;
    border: 1px solid rgba(245, 158, 11, 0.2);
    font-size: 0.875rem;
}

/* Credits Section */
.credits {
    padding: 80px 0;
    background: var(--light-surface);
}

.credits-content {
    text-align: center;
}

.credits-header {
    margin-bottom: 3rem;
}

.credits-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.credits-header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.credits-card {
    background: white;
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--light-border);
    max-width: 800px;
    margin: 0 auto;
}

.credits-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

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

.credits-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.credits-info p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
    text-align: left;
}

.credits-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.credit-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.credit-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.credits-note {
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.footer-info p {
    color: #94a3b8;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.footer-license {
    color: #64748b;
    font-size: 0.875rem;
}

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

.footer-section h4 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section a {
    display: block;
    color: #94a3b8;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

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

.footer-section .link-disabled {
    display: block;
    color: #64748b;
    font-style: italic;
    margin-bottom: 0.5rem;
    cursor: not-allowed;
    opacity: 0.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--dark-border);
    color: #64748b;
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

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

    .nav-links {
        display: none;
    }

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

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

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

    .requirements-content {
        flex-direction: column;
        text-align: center;
    }

    .credits-links {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

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

.feature-card,
.download-card,
.changelog-item,
.credits-card {
    animation: fadeInUp 0.6s ease-out;
}