:root {
    --canvas: #fafaf9;
    --surface: #ffffff;
    --surface-alt: #f7f7f6;
    --border: #e4e4e1;
    --ink: #171714;
    --muted: #666460;
    --primary: #059669;
    --primary-dark: #047857;
    --primary-ink: #ffffff;
    --boost: #d97706;
    --boost-bg: rgba(217, 119, 6, 0.1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --canvas: #0c0e0c;
        --surface: #161815;
        --surface-alt: #1e201c;
        --border: #2d2f2a;
        --ink: #f0f0ed;
        --muted: #a1a39c;
        --primary: #10b981;
        --primary-dark: #059669;
        --primary-ink: #080f0c;
        --boost: #f59e0b;
        --boost-bg: rgba(245, 158, 11, 0.12);
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--canvas);
    color: var(--ink);
    font-family: 'Poppins', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
}

.wrap {
    max-width: 760px;
    margin: 0 auto;
    padding: 2.5rem 1.25rem 4rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    text-decoration: none;
    color: var(--ink);
}

.logo-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 0.5rem;
    background: var(--primary);
    color: var(--primary-ink);
    flex-shrink: 0;
}

.logo strong {
    color: var(--primary);
    font-weight: 600;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    background: var(--boost-bg);
    color: var(--boost);
    font-size: 0.75rem;
    font-weight: 600;
}

.hero {
    text-align: center;
    padding: 3rem 0 2rem;
}

.hero h1 {
    font-size: 2rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin: 1rem 0 0.75rem;
}

.hero p {
    color: var(--muted);
    max-width: 32rem;
    margin: 0 auto;
}

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

.notice {
    background: var(--boost-bg);
    color: var(--boost);
    border-radius: 0.75rem;
    padding: 0.85rem 1.1rem;
    font-size: 0.875rem;
    margin: 1rem 0 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 0.5rem;
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--primary);
    color: var(--primary-ink);
}

.btn-secondary {
    background: var(--surface);
    color: var(--ink);
    border-color: var(--border);
}

article h1 {
    font-size: 1.75rem;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

article .updated {
    color: var(--muted);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

article h2 {
    font-size: 1.05rem;
    margin: 1.75rem 0 0.5rem;
}

article p, article li {
    color: var(--ink);
    font-size: 0.95rem;
}

article ul {
    padding-left: 1.25rem;
}

nav.top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 760px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 0;
}

footer {
    border-top: 1px solid var(--border);
    margin-top: 3rem;
    padding: 2rem 1.25rem;
}

footer .inner {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--muted);
}

footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
}

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

footer a:hover {
    color: var(--ink);
}

.contact-box {
    text-align: center;
    padding: 2rem 1.5rem;
}

.contact-box .email {
    display: block;
    margin-top: 0.5rem;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
}