:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --heading-color: #ffffff;
    --accent-primary: #2f81f7;
    --accent-hover: #58a6ff;
    --secondary-bg: #161b22;
    --border-color: #30363d;
    --card-bg: #161b22;
    --card-border: #30363d;
    --hero-gradient: linear-gradient(180deg, rgba(13,17,23,0) 0%, rgba(13,17,23,1) 100%), linear-gradient(135deg, #1f2428 0%, #0d1117 100%);
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    padding: 4rem 1rem;
    text-align: center;
    background: var(--hero-gradient);
    border-bottom: 1px solid var(--border-color);
}

h1 {
    margin: 0;
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--heading-color);
    letter-spacing: -1px;
    background: linear-gradient(120deg, #fff, #8b949e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.5rem;
    color: #8b949e;
    margin-top: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    flex: 1;
    width: 100%;
}

.cta-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 2.5rem 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #ffffff;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 1px 0 rgba(27,31,36,0.1);
}

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

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

.btn-secondary:hover {
    background-color: #21262d;
    border-color: #8b949e;
    transform: translateY(-1px);
}

h2 {
    color: var(--heading-color);
    font-size: 2rem;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
}

.feature-card h3 {
    margin-top: 0;
    color: var(--heading-color);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.installation-steps {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

ol {
    margin: 0;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

code {
    background-color: rgba(110, 118, 129, 0.4);
    padding: 0.2em 0.4em;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 85%;
}

footer {
    text-align: center;
    padding: 3rem 1rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
    color: #8b949e;
    font-size: 0.9rem;
}

footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

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

@media (max-width: 600px) {
    h1 { font-size: 2.5rem; }
    .cta-container { flex-direction: column; }
    .btn { width: 100%; }
}