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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #fff;
}

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

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* Hero */
.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* Downloads */
.downloads {
    padding: 3rem 0;
    background-color: var(--bg-light);
}

.downloads h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

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

.download-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

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

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.download-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.download-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.download-btn:hover {
    background-color: var(--primary-dark);
}

.github-btn {
    background-color: #24292e;
}

.github-btn:hover {
    background-color: #1a1e22;
}

.install-info {
    margin-top: 1.5rem;
    text-align: left;
}

.install-info details {
    background-color: var(--bg-light);
    padding: 1rem;
    border-radius: 8px;
    cursor: pointer;
}

.install-info summary {
    font-weight: 600;
    color: var(--primary-color);
}

.install-info pre {
    background-color: var(--text-dark);
    color: #f9fafb;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1rem 0;
    font-size: 0.875rem;
}

.install-info p {
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

.requirements {
    margin-top: 1.5rem;
    text-align: left;
    background-color: var(--bg-light);
    padding: 1rem;
    border-radius: 8px;
}

.requirements h4 {
    font-size: 0.95rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

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

.requirements li {
    padding: 0.25rem 0;
    color: var(--text-light);
    font-size: 0.875rem;
    padding-left: 1.25rem;
    position: relative;
}

.requirements li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.macos-unavailable li::before {
    content: "✗";
    color: #ef4444;
}

/* Features */
.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

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

.feature {
    padding: 1.5rem;
}

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

.feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature p {
    color: var(--text-light);
}

/* Screenshots */
.screenshots {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.screenshots h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

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

.screenshot {
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.screenshot img {
    width: 100%;
    height: auto;
    display: block;
    border-bottom: 1px solid var(--border-color);
}

.screenshot-caption {
    padding: 1rem;
    text-align: center;
    color: var(--text-dark);
    font-weight: 500;
}

.screenshot-placeholder {
    background-color: white;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-light);
    font-style: italic;
}

/* System Requirements */
.system-requirements {
    padding: 4rem 0;
}

.system-requirements h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.requirements-card {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.requirements-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.requirements-card ul {
    list-style: none;
}

.requirements-card li {
    padding: 0.5rem 0;
    color: var(--text-light);
    padding-left: 1.5rem;
    position: relative;
}

.requirements-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* FAQ */
.faq {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.faq h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.faq-item {
    max-width: 800px;
    margin: 0 auto 1rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.faq-item details {
    padding: 1.5rem;
}

.faq-item summary {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text-dark);
    cursor: pointer;
    list-style: none;
}

.faq-item summary::marker {
    display: none;
}

.faq-item summary::before {
    content: "▶";
    display: inline-block;
    margin-right: 0.5rem;
    transition: transform 0.3s ease;
}

.faq-item details[open] summary::before {
    transform: rotate(90deg);
}

.faq-item p {
    margin-top: 1rem;
    color: var(--text-light);
    line-height: 1.6;
}

.faq-item code {
    background-color: var(--bg-light);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9rem;
}

.faq-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.faq-item a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

footer p {
    margin: 0.5rem 0;
}

footer a {
    color: white;
    text-decoration: none;
    margin: 0 0.5rem;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .download-cards,
    .feature-grid,
    .screenshot-grid {
        grid-template-columns: 1fr;
    }
}