:root {
  --color-primary: #000000;
  --color-on-primary: #ffffff;
  --color-ink: #000000;
  --color-body: #737373;
  --color-mute: #a3a3a3;
  --color-canvas: #ffffff;
  --color-surface-soft: #fafafa;
  --color-hairline: #e5e5e5;
  --color-surface-dark: #171717;
  --color-terminal-red: #ff5f56;
  --color-terminal-yellow: #ffbd2e;
  --color-terminal-green: #27c93f;
  --rounded-lg: 12px;
  --rounded-full: 9999px;
  --font-display: "SF Pro Rounded", Nunito, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: ui-sans-serif, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", monospace;
}

* { box-sizing: border-box; }
html { background: #e8e8e8; }
body {
  margin: 0 auto;
  max-width: 390px;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-canvas);
  line-height: 1.5;
  padding-bottom: 60px;
}
a { color: var(--color-ink); text-decoration: none; }

.top {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { font-family: var(--font-display); font-weight: 600; color: #000; }
.back { font-size: 12px; color: var(--color-body); }

.hero { padding: 32px 16px 16px; text-align: center; }
.hero h1 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 500;
  margin: 8px 0 8px;
  line-height: 1.15;
}
.hero p { margin: 0; color: var(--color-body); font-size: 14px; }
.hero.light { text-align: left; padding: 24px 16px; }
.snippet {
  display: block;
  background: var(--color-surface-soft);
  border-radius: 9999px;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  margin-top: 16px;
}

.block { padding: 16px; }
.block h2 { font-family: var(--font-display); font-size: 18px; font-weight: 600; margin: 0 0 12px; }

.cell {
  display: block;
  border: 1px solid var(--color-hairline);
  padding: 16px;
  margin-bottom: 8px;
  color: var(--color-ink);
  border-radius: 12px;
}
.cell:hover { text-decoration: none; }
.cell h3 { margin: 0 0 4px; font-size: 16px; font-weight: 500; }
.cell p { margin: 0; color: var(--color-body); font-size: 13px; }

.row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-hairline);
  font-size: 14px;
}
.row:last-child { border-bottom: 0; }
.row span { color: var(--color-body); }

.ph {
  background: var(--color-surface-soft);
  color: var(--color-mute);
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin-bottom: 12px;
  border-radius: 12px;
}

form label { display: block; margin: 0 0 4px; font-size: 14px; }
form input, form textarea {
  width: 100%;
  padding: 10px 16px;
  border: 1px solid var(--color-hairline);
  font: inherit;
  margin-bottom: 12px;
  border-radius: 9999px;
}
form textarea { border-radius: 12px; }
form button {
  width: 100%;
  padding: 10px;
  border: 0;
  background: #000;
  color: #fff;
  font: 500 14px var(--font-body);
  border-radius: 9999px;
  height: 36px;
}

.tab {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 100%;
  max-width: 390px;
  display: flex;
  border-top: 1px solid var(--color-hairline);
  background: #fff;
}
.tab a {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-body);
}
.tab a.on { color: #000; }

.ph { overflow: hidden; }
.ph img { width: 100%; height: 100%; object-fit: cover; display: block; }