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

body {
    font-family: ui-sans-serif, system-ui, sans-serif;
    background: #f8f9fa;
    color: #212529;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 16px rgba(0,0,0,.08);
    padding: 3rem 3.5rem;
    max-width: 620px;
    width: 100%;
}

.badge {
    display: inline-block;
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: #6c757d;
    margin-bottom: 1rem;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: .75rem;
    color: #0d1117;
}

.description {
    font-size: 1rem;
    line-height: 1.6;
    color: #495057;
    margin-bottom: 2rem;
}

.features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    margin-bottom: 2.5rem;
}

.features li {
    font-size: .9375rem;
    color: #495057;
    padding-left: 1.25rem;
    position: relative;
}

.features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #868e96;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .625rem 1.25rem;
    border-radius: 8px;
    font-size: .9375rem;
    font-weight: 500;
    text-decoration: none;
    transition: opacity .15s;
}

.btn:hover { opacity: .85; }

.btn-primary {
    background: #212529;
    color: #fff;
}

.btn-secondary {
    background: #f1f3f5;
    color: #212529;
}

.stack {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e9ecef;
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}

.tag {
    font-size: .8125rem;
    color: #6c757d;
    background: #f1f3f5;
    border-radius: 4px;
    padding: .2rem .6rem;
}