:root {
  color-scheme: light;
  --paper: #f5f7f6; --surface: #ffffff; --ink: #1c2928; --muted: #526360;
  --line: #d6e0dc; --accent: #126f66; --accent-hover: #0d5b53; --accent-soft: #e7f2ef;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.5; }
.shell { width: min(100% - 48px, 960px); margin-inline: auto; }
.topbar { background: var(--surface); border-bottom: 1px solid var(--line); }
.topbar-inner { min-height: 66px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--accent); font-size: 13px; font-weight: 700; }
.brand img { display: block; flex: none; }
.topbar-label { color: var(--muted); font-size: 12px; }
main { padding-top: 64px; padding-bottom: 66px; }
.eyebrow, .section-kicker { margin: 0 0 12px; color: var(--accent); font-size: 12px; font-weight: 700; }
h1 { margin: 0; font-size: clamp(30px, 4vw, 42px); line-height: 1.25; font-weight: 700; text-wrap: balance; }
.lead { max-width: 66ch; margin: 18px 0 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
section { margin-top: 52px; border-top: 1px solid var(--line); }
.section-heading { padding-top: 22px; display: flex; justify-content: space-between; align-items: end; gap: 16px; }
.section-kicker { margin-bottom: 6px; }
h2 { margin: 0; font-size: 20px; line-height: 1.4; font-weight: 650; }
.timezone { color: var(--muted); font-size: 13px; white-space: nowrap; }
.time-display { margin-top: 20px; padding: 25px 28px 23px; background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 4px; }
#clock { display: block; font-size: clamp(24px, 4vw, 36px); line-height: 1.35; font-weight: 650; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.time-caption { display: block; margin-top: 7px; color: var(--muted); font-size: 12px; }
.interaction-section { margin-top: 46px; }
.interaction-row { min-height: 90px; padding: 17px 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); }
.state-copy { display: grid; gap: 5px; }
.state-label { color: var(--muted); font-size: 12px; }
.state-value { display: inline-flex; align-items: center; gap: 9px; font-size: 17px; font-weight: 650; }
.state-dot { width: 9px; height: 9px; background: #a27838; border-radius: 50%; }
.state-value.is-confirmed .state-dot { background: var(--accent); }
button { min-height: 42px; padding: 9px 17px; border: 1px solid var(--accent); border-radius: 4px; background: var(--accent); color: #fff; font: inherit; font-size: 14px; font-weight: 650; cursor: pointer; white-space: nowrap; }
button:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
button[aria-pressed="true"] { background: var(--surface); color: var(--accent); }
button[aria-pressed="true"]:hover { background: var(--accent-soft); }
button:focus-visible { outline: 3px solid #a27838; outline-offset: 3px; }
.footnote { margin: 26px 0 0; color: var(--muted); font-size: 12px; }
footer { border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; gap: 14px; padding-top: 22px; padding-bottom: 30px; color: var(--muted); font-size: 12px; }
@media (max-width: 600px) {
  .shell { width: min(100% - 32px, 960px); }
  .topbar-inner { min-height: 58px; }
  .topbar-label { display: none; }
  main { padding-top: 42px; padding-bottom: 48px; }
  section { margin-top: 40px; }
  .section-heading { align-items: start; flex-direction: column; gap: 7px; }
  .time-display { padding: 22px 18px; }
  .interaction-row { align-items: stretch; flex-direction: column; gap: 16px; padding-bottom: 22px; }
  button { align-self: flex-start; }
  .footer-inner { flex-direction: column; gap: 4px; }
}