:root {
    --primary: #2563EB;
    --primary-hover: #1d4ed8;
    --secondary: #7C3AED;
    --accent: #06B6D4;
    --bg-dark: #0F172A;
    --surface-dark: #1E293B;
    --text-main: #F1F5F9;
    --text-muted: #94A3B8;
    --border: #334155;
    --success: #10B981;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
header {
    background-color: var(--surface-dark);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

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

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

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--text-main);
}

.logo {
    height: 40px;
    width: auto;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.main-site-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* Download Card */
.download-card {
    background-color: var(--surface-dark);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    max-width: 500px;
    margin: 0 auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.os-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    background-color: var(--primary);
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: background-color 0.2s, transform 0.1s;
    margin-bottom: 1rem;
}

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

.download-btn:active {
    transform: translateY(0);
}

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

/* Installation Guide */
.guide-section {
    max-width: 600px;
    margin: 4rem auto 0;
    text-align: left;
    background-color: rgba(30, 41, 59, 0.5);
    padding: 2rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
}

.guide-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
}

.guide-steps {
    list-style: none;
    counter-reset: step;
}

.guide-steps li {
    position: relative;
    padding-left: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.guide-steps li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 1.5rem;
    height: 1.5rem;
    background-color: var(--border);
    color: var(--text-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.warning-box {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    color: #F59E0B; /* Warning color */
}

.warning-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

/* Footer */
footer {
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}