:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #64748b;
    --background: #ffffff;
    --surface: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;
    --gradient-start: #3b82f6;
    --gradient-end: #8b5cf6;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
    line-height: 1.5;
    background-color: var(--background);
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: white;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: var(--surface);
    transform: translateY(-1px);
}

.btn-icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

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

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 40%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 9999px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

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

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.stat-divider {
    width: 1px;
    height: 40px;
    background-color: var(--border);
}

.hero-visual {
    margin-top: 4rem;
    perspective: 1000px;
}

.app-window {
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border);
    overflow: hidden;
    transform: rotateX(2deg);
    transition: transform 0.3s;
}

.app-window:hover {
    transform: rotateX(0deg);
}

.window-header {
    background: #f1f5f9;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

.window-controls {
    display: flex;
    gap: 0.5rem;
    margin-right: 1rem;
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control-dot.red { background-color: #ef4444; }
.control-dot.yellow { background-color: #eab308; }
.control-dot.green { background-color: #22c55e; }

.window-title {
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex: 1;
    text-align: center;
    margin-right: 3rem; /* Balance controls */
}

.window-content {
    height: 400px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background-image: linear-gradient(#f1f5f9 1px, transparent 1px), linear-gradient(90deg, #f1f5f9 1px, transparent 1px);
    background-size: 20px 20px;
}

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

.section-title {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 4rem;
    font-size: 1.125rem;
}

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

.feature-card {
    padding: 2rem;
    border-radius: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    transition: transform 0.2s;
}

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

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

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

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

.download-card {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    color: white;
    border-radius: 1.5rem;
    padding: 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.2), transparent 60%);
}

.download-info {
    position: relative;
    z-index: 1;
    margin-bottom: 3rem;
}

.download-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.download-info p {
    font-size: 1.25rem;
    color: #94a3b8;
    margin-bottom: 2rem;
}

.version-info {
    display: inline-flex;
    gap: 1.5rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    backdrop-filter: blur(4px);
}

.download-actions {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.btn-download {
    background: var(--primary-color);
    color: white;
    font-size: 1.125rem;
    padding: 1rem 2.5rem;
}

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

.download-size {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-left: 0.5rem;
    font-weight: 400;
}

.download-options {
    display: flex;
    gap: 1rem;
    color: #94a3b8;
    font-size: 0.875rem;
}

.download-option {
    color: #94a3b8;
    text-decoration: none;
}

.download-option:hover {
    color: white;
    text-decoration: underline;
}

/* Stats Section */
.stats-section {
    padding: 6rem 0;
    background: var(--surface);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.stats-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.stats-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.stats-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.time-filter {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

canvas {
    width: 100% !important;
    height: 300px !important;
}

/* Changelog */
.changelog {
    padding: 6rem 0;
}

.changelog-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.changelog-timeline::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.changelog-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 3rem;
}

.changelog-marker {
    position: absolute;
    left: 12px;
    top: 4px;
    width: 16px;
    height: 16px;
    background: white;
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    z-index: 1;
}

.changelog-content {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
}

.changelog-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.changelog-version {
    font-weight: 700;
    color: var(--primary-color);
}

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

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

.changelog-list li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.changelog-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 3fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.footer-column a {
    display: block;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    transition: color 0.2s;
}

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

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}