:root {
  --color-primary: #201d1d;
  --color-on-primary: #fdfcfc;
  --color-ink: #201d1d;
  --color-body: #424245;
  --color-mute: #646262;
  --color-ash: #9a9898;
  --color-canvas: #fdfcfc;
  --color-surface-soft: #f8f7f7;
  --color-surface-card: #f1eeee;
  --color-surface-dark: #201d1d;
  --color-hairline: rgba(15,0,0,0.12);
  --rounded-sm: 4px;
  --font-mono: "Berkeley Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", monospace;
}

* { box-sizing: border-box; }
html { background: #e8e4e4; }
body {
  margin: 0 auto;
  max-width: 390px;
  min-height: 100vh;
  font-family: var(--font-mono);
  color: var(--color-ink);
  background: var(--color-canvas);
  line-height: 1.5;
  padding-bottom: 56px;
  font-size: 16px;
}
a { color: var(--color-ink); text-decoration: none; }

.top {
  border-bottom: 1px solid var(--color-hairline);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { font-weight: 700; color: var(--color-ink); font-size: 14px; letter-spacing: 0.04em; }
.back { font-size: 12px; color: var(--color-mute); }

.hero { padding: 24px 16px; }
.hero h1 { font-size: 28px; font-weight: 700; margin: 0 0 8px; line-height: 1.5; }
.hero p { margin: 0; color: var(--color-body); font-size: 14px; }
.tui {
  background: var(--color-surface-dark);
  color: #fdfcfc;
  padding: 24px 16px;
  font-size: 12px;
}
.tui-hint { color: var(--color-ash); margin-top: 12px; }

.block { padding: 16px; border-top: 1px solid var(--color-hairline); }
.block h2 { font-size: 16px; font-weight: 700; margin: 0 0 12px; }

.cell {
  display: block;
  padding: 8px 0;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-hairline);
}
.cell:hover { text-decoration: none; }
.cell h3 { margin: 0 0 4px; font-size: 16px; font-weight: 700; }
.cell p { margin: 0; color: var(--color-body); font-size: 14px; }

.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-mute); }

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

form label { display: block; margin: 0 0 4px; font-size: 14px; }
form input, form textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-hairline);
  font: inherit;
  margin-bottom: 12px;
  border-radius: 4px;
  background: var(--color-surface-soft);
}
form button {
  width: 100%;
  padding: 8px 20px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: 500 16px var(--font-mono);
  border-radius: 4px;
  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: var(--color-canvas);
}
.tab a {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-mute);
}
.tab a.on { color: var(--color-ink); }

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