:root {
  --primary: #55c500;
  --bg: #f7f7f7;
  --card: #ffffff;
  --text: #333;
  --muted: #777;
  --border: #e0e0e0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
}
header {
  background: var(--primary);
  color: white;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
header h1 { margin: 0; font-size: 20px; }
header .author { font-size: 13px; }
header .author a { color: white; text-decoration: underline; }
header .author a:hover { opacity: 0.85; }
main { padding: 24px; max-width: 1100px; margin: 0 auto; }

/* ===== Controls ===== */
.controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}
.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
input[type="text"], input[type="password"] {
  flex: 1;
  min-width: 220px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}
label.inline { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 4px; }
button.secondary { background: #999; }
button {
  padding: 10px 20px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: bold;
}
button:disabled { background: #aaa; cursor: not-allowed; }

/* ===== Summary ===== */
.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.summary .card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}
.summary .label { color: var(--muted); font-size: 12px; }
.summary .value { font-size: 24px; font-weight: bold; margin-top: 4px; }

/* ===== Charts ===== */
.charts {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}
@media (max-width: 800px) {
  .charts { grid-template-columns: 1fr; }
}
.chart-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.chart-card h2 { margin: 0 0 12px; font-size: 16px; }
.chart-card-wide { grid-column: 1 / -1; }

/* ===== Formula table ===== */
table.formula { width: 100%; border-collapse: collapse; font-size: 13px; margin: 8px 0 12px; }
table.formula th, table.formula td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
table.formula th { background: #fafafa; }
table.formula td:nth-child(2), table.formula th:nth-child(2) { text-align: right; width: 60px; }
table.formula td:nth-child(3), table.formula th:nth-child(3) { text-align: center; width: 90px; }
table.formula th.section { background: #eef7e6; color: #333; }

/* ===== Status ===== */
.status { margin-bottom: 16px; color: var(--muted); font-size: 14px; min-height: 20px; }
.error { color: #c00; }
.hint { font-size: 12px; color: var(--muted); margin-top: 8px; }

/* ===== Profile card (Phase 2) ===== */
.profile-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.profile-card img.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.profile-card .profile-body { flex: 1; min-width: 0; }
.profile-card .profile-name { font-size: 18px; font-weight: bold; margin: 0 0 4px; }
.profile-card .profile-id { color: var(--muted); font-size: 13px; margin: 0 0 8px; }
.profile-card .profile-id a { color: var(--muted); text-decoration: none; }
.profile-card .profile-id a:hover { text-decoration: underline; }
.profile-card .profile-desc { font-size: 13px; margin: 0 0 8px; white-space: pre-wrap; word-wrap: break-word; }
.profile-card .profile-meta { display: flex; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--muted); }
.profile-card .profile-meta b { color: var(--text); }
.profile-card .profile-links { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 12px; font-size: 13px; }
.profile-card .profile-links a { color: var(--primary); text-decoration: none; }
.profile-card .profile-links a:hover { text-decoration: underline; }
@media (max-width: 600px) {
  .profile-card { flex-direction: column; align-items: center; text-align: center; }
  .profile-card .profile-meta { justify-content: center; }
}

/* ===== Rankings (Phase 2) ===== */
.rankings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}
@media (max-width: 800px) {
  .rankings { grid-template-columns: 1fr; }
}
table.ranking { width: 100%; border-collapse: collapse; font-size: 13px; }
table.ranking th, table.ranking td { border-bottom: 1px solid var(--border); padding: 8px 6px; text-align: left; }
table.ranking th { background: #fafafa; font-weight: bold; color: var(--muted); font-size: 12px; }
table.ranking td.rank { width: 32px; text-align: center; font-weight: bold; color: var(--primary); }
table.ranking td.num { text-align: right; width: 56px; font-variant-numeric: tabular-nums; }
table.ranking td.date { width: 90px; color: var(--muted); font-size: 12px; white-space: nowrap; }
table.ranking td.title a { color: var(--text); text-decoration: none; }
table.ranking td.title a:hover { color: var(--primary); text-decoration: underline; }
table.ranking td.title { word-break: break-word; }
.no-data { color: var(--muted); font-size: 13px; padding: 12px 0; text-align: center; }

/* ===== Tags (Phase 2) ===== */
#tagsSection { margin-top: 24px; }
.tags-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}
@media (max-width: 800px) {
  .tags-grid { grid-template-columns: 1fr; }
}
table.tags { width: 100%; border-collapse: collapse; font-size: 13px; }
table.tags th, table.tags td { border-bottom: 1px solid var(--border); padding: 6px 8px; }
table.tags th { background: #fafafa; font-weight: bold; color: var(--muted); font-size: 12px; text-align: left; }
table.tags td.tag { font-weight: bold; }
table.tags td.tag a { color: var(--primary); text-decoration: none; }
table.tags td.tag a:hover { text-decoration: underline; }
table.tags td.num { text-align: right; width: 70px; font-variant-numeric: tabular-nums; }
table.tags th.sortable {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
table.tags th.sortable:hover { background: #f0f0f0; }
table.tags th.sortable.num { text-align: right; }
table.tags .sort-arrow {
  display: inline-block;
  margin-left: 4px;
  color: #bbb;
  font-size: 11px;
}
table.tags .sort-arrow.active { color: var(--primary); }

/* ===== Stats section ===== */
.stats-section h2 { margin: 0 0 12px; font-size: 16px; }
.stats-subtitle {
  margin: 16px 0 8px;
  font-size: 13px;
  color: var(--muted);
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.stats-subtitle:first-of-type { margin-top: 4px; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}
.stat-card {
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
}
.stat-label { color: var(--muted); font-size: 12px; }
.stat-value {
  font-size: 20px;
  font-weight: bold;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
.stat-hint { font-size: 11px; color: var(--muted); margin-top: 4px; line-height: 1.3; }