:root {
    color-scheme: light;
    --ink: #17222d;
    --muted: #607080;
    --paper: #ffffff;
    --canvas: #eef3f6;
    --accent: #087f73;
    --accent-soft: #d9f1ec;
    --line: #d7e0e6;
    font-family: Inter, "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    color: var(--ink);
    background: radial-gradient(circle at 15% 10%, rgb(8 127 115 / 12%), transparent 32rem), linear-gradient(145deg, var(--canvas), #f8fafb 70%);
}

.page-shell { min-height: 100vh; display: grid; place-items: center; padding: 2rem 1.25rem; }
.status-card { width: min(100%, 720px); padding: clamp(2rem, 6vw, 4.5rem); background: rgb(255 255 255 / 92%); border: 1px solid var(--line); border-radius: 1.5rem; box-shadow: 0 1.5rem 4rem rgb(30 55 70 / 12%); }
.eyebrow { margin-bottom: 2rem; color: var(--muted); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.14em; }
.status-mark { width: 3.25rem; height: 3.25rem; display: grid; place-items: center; margin-bottom: 1.5rem; border-radius: 50%; background: var(--accent-soft); }
.status-mark span { width: 0.8rem; height: 0.8rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0.45rem rgb(8 127 115 / 14%); }
h1 { max-width: 15ch; margin: 0; font-family: Georgia, "Yu Mincho", serif; font-size: clamp(2.1rem, 7vw, 4.5rem); font-weight: 600; letter-spacing: -0.035em; line-height: 1.08; }
.lead { margin: 1.5rem 0 2.5rem; color: var(--accent); font-size: clamp(1.05rem, 2.5vw, 1.3rem); font-weight: 700; }
.runtime-summary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.runtime-summary div { padding: 1.25rem 0; }
.runtime-summary div + div { padding-left: 1.5rem; border-left: 1px solid var(--line); }
dt { color: var(--muted); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
dd { margin: 0.35rem 0 0; font-weight: 700; }
a { color: var(--accent); text-underline-offset: 0.2em; }
.note { margin: 1.5rem 0 0; color: var(--muted); line-height: 1.8; }

@media (max-width: 520px) {
    .runtime-summary { grid-template-columns: 1fr; }
    .runtime-summary div + div { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
}