:root {
    --bg: #000;
    --fg: #fff;
    --muted: rgba(255,255,255,0.6);
    --accent: #18ccba7d;

    --font-main: system-ui, sans-serif;
    --font-mono: ui-monospace, monospace;
}

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

html, body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-main);
}

.sig {
    max-width: 680px;
    margin: 0 auto;
    padding: 32px;
}

.sig-header {
    margin-bottom: 48px;
}

.back {
    display: inline-block;
    margin-bottom: 16px;
    text-decoration: none;
    font-size: 14px;
    color: var(--muted);
}

.sig-header h1 {
    font-size: 22px;
    letter-spacing: 2px;
}

.sig-list {
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.sig-item {
    font-family: var(--font-mono);
}

.sig-item time {
    display: block;
    font-size: 10px;
    letter-spacing: 6px;
    color: var(--accent);
    margin-bottom: 8px;
}

.sig-item p {
    font-size: 12px;
    line-height: 1.6;
}

.sig-footer {
    margin-top: 64px;
    font-size: 11px;
    color: var(--muted);
}

@media (max-width: 640px) {
    .sig {
        padding: 24px 16px;
    }
}