:root {
  --bg: #10131c;
  --panel: #171c28;
  --panel-border: #262c3c;
  --text: #eef0f3;
  --muted: #9aa1ad;
  --accent: #d9861f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  border-bottom: 1px solid var(--panel-border);
}

header .brand { display: flex; align-items: baseline; gap: 10px; }
header .brand b { font-size: 20px; letter-spacing: 0.04em; }
header .brand span { color: var(--muted); font-size: 12px; }

header nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  margin-left: 16px;
  border: 1px solid var(--panel-border);
  padding: 8px 14px;
  border-radius: 6px;
}
header nav a:hover { color: var(--text); border-color: var(--accent); }

main { max-width: 1080px; margin: 0 auto; padding: 28px; }

.badge-demo {
  display: inline-block;
  font-size: 12px;
  color: #d9a441;
  background: rgba(217, 164, 65, 0.12);
  border: 1px solid rgba(217, 164, 65, 0.4);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 20px;
}

h2 { font-size: 15px; color: var(--muted); font-weight: 600; margin: 32px 0 12px; letter-spacing: 0.02em; }

.sites { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }

.site-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 18px;
  border-top: 4px solid var(--level-color, var(--accent));
}
.site-card .name { font-size: 15px; font-weight: 600; }
.site-card .loc { font-size: 12px; color: var(--muted); margin-top: 2px; }
.site-card .wbgt-row { display: flex; align-items: baseline; gap: 8px; margin: 16px 0 4px; }
.site-card .wbgt { font-size: 36px; font-weight: 700; font-variant-numeric: tabular-nums; }
.site-card .unit { font-size: 13px; color: var(--muted); }
.site-card .level {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  color: #14151a;
  background: var(--level-color, var(--accent));
  margin-bottom: 14px;
}
.site-card .actions { display: flex; gap: 6px; flex-wrap: wrap; }
.site-card button {
  flex: 1;
  min-width: 64px;
  background: #1f232c;
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 8px 6px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}
.site-card button:hover { border-color: var(--accent); }

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 4px 18px;
}
.feed-item {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--panel-border);
  font-size: 13px;
}
.feed-item:last-child { border-bottom: none; }
.feed-item time { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.feed-item .site-tag { color: var(--accent); white-space: nowrap; }
.feed-item .msg { color: var(--text); }
.feed-empty { color: var(--muted); padding: 20px 0; font-size: 13px; }

.toolbar { display: flex; justify-content: flex-end; margin: 18px 0; }
.toolbar a {
  color: var(--bg);
  background: var(--accent);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 6px;
}

/* check-in page */
.form-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 24px;
  max-width: 420px;
  margin: 0 auto;
}
.form-card label { display: block; font-size: 13px; color: var(--muted); margin: 16px 0 6px; }
.form-card input[type=text], .form-card select {
  width: 100%;
  background: #1f232c;
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 14px;
}
.form-card .segmented { display: flex; gap: 8px; }
.form-card .segmented button {
  flex: 1;
  padding: 10px 6px;
  border-radius: 6px;
  border: 1px solid var(--panel-border);
  background: #1f232c;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}
.form-card .segmented button.active { border-color: var(--accent); background: rgba(217,164,65,0.15); }
.form-card .submit {
  margin-top: 22px;
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #14151a;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
}
.confirm { text-align: center; color: var(--muted); font-size: 13px; margin-top: 14px; min-height: 18px; }

@media (max-width: 640px) {
  header { flex-direction: column; align-items: flex-start; gap: 12px; }
  header nav { display: flex; gap: 8px; flex-wrap: wrap; }
  header nav a { margin-left: 0; }
  main { padding: 20px 16px; }
  .sites { grid-template-columns: 1fr; }
}