:root {
    color-scheme: dark;
    --background: #0f1117;
    --surface: #171b24;
    --surface-border: #2a3140;
    --text: #f5f7fa;
    --muted: #a9b1bc;
    --primary: #4f8cff;
    --primary-hover: #6ca0ff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--background);
    background-color: var(--background);
    color: var(--text);
    font-family: Inter, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 900px;
}

.runtime {
    display: inline-block;
    margin-bottom: 1rem;
    color: var(--muted);
    font-size: 0.875rem;
}

h1 {
    margin: 0;
    font-size: 3rem;
}

.tagline {
    color: var(--muted);
    margin-bottom: 2rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.button {
    text-decoration: none;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: 0.2s ease;
}

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

.button.primary:hover {
    background: var(--primary-hover);
}

.button.secondary {
    background: transparent;
    border: 1px solid var(--surface-border);
    color: var(--text);
}

.button.secondary:hover {
    background: rgba(255,255,255,0.05);
}

footer {
    margin-top: 2rem;
    color: var(--muted);
    font-size: 0.875rem;
}

html {
    color-scheme: dark;
    background: var(--background);
}