:root {
    --gco-primary: #0f172a;
    --gco-secondary: #f59e0b;
    --gco-accent: #22c55e;
    --gco-surface: #ffffff;
    --gco-text: #0f172a;
    --gco-muted: #475569;
    --gco-border: rgba(15, 23, 42, 0.12);
}

.gco-shell {
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem;
    color: var(--gco-text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.gco-hero {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(30, 41, 59, 0.92));
    color: #fff;
    border-radius: 24px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
}

.gco-card {
    background: var(--gco-surface);
    border: 1px solid var(--gco-border);
    border-radius: 20px;
    padding: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
}

.gco-badge,
.gco-button {
    display: inline-block;
    padding: 0.7rem 1rem;
    border-radius: 999px;
    background: var(--gco-primary);
    color: #fff;
    text-decoration: none;
    border: 0;
}

.gco-progress {
    height: 12px;
    background: rgba(15, 23, 42, 0.10);
    border-radius: 999px;
    overflow: hidden;
}

.gco-progress span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--gco-secondary), var(--gco-accent));
}

.gco-checklist {
    list-style: disc;
    padding-left: 1.25rem;
}

.gco-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

@media (max-width: 720px) {
    .gco-grid {
        grid-template-columns: 1fr;
    }
}