:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #1c2128;
  --border: #30363d;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --orange: #d18616;
  --purple: #a371f7;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* Header */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header .brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

header h1 {
  font-size: 16px;
  font-weight: 600;
}

.network-badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(88, 166, 255, 0.15);
  color: var(--accent);
  border: 1px solid rgba(88, 166, 255, 0.3);
}

header .controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

header .status {
  font-size: 12px;
  color: var(--text-muted);
}

header .status.ok { color: var(--green); }
header .status.error { color: var(--red); }

/* Buttons */
button {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* Tabs */
.tabs {
  display: flex;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}

.tab {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: color 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

.content { padding: 24px; max-width: 1100px; margin: 0 auto; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.filter-bar select,
.filter-bar input[type="text"] {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
}
.filter-bar select { min-width: 160px; }
.filter-bar input[type="text"] { flex: 1; min-width: 180px; }
.filter-bar select:focus,
.filter-bar input[type="text"]:focus { border-color: var(--accent); outline: none; }

/* Leaderboard table */
.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.leaderboard-table th {
  text-align: left;
  padding: 8px 12px;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.leaderboard-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
.leaderboard-table tbody tr { cursor: pointer; }
.leaderboard-table tbody tr:hover { background: rgba(88, 166, 255, 0.04); }
.leaderboard-table .rank-cell { font-weight: 600; width: 40px; }
.leaderboard-table .did-cell { font-family: monospace; font-size: 12px; }
.leaderboard-table .score-cell { font-weight: 600; }
.leaderboard-table tr.rank-1 .rank-cell { color: #ffd700; }
.leaderboard-table tr.rank-2 .rank-cell { color: #c0c0c0; }
.leaderboard-table tr.rank-3 .rank-cell { color: #cd7f32; }

/* Tier badges */
.tier-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.tier-elite       { background: rgba(163, 113, 247, 0.15); color: var(--purple); border: 1px solid rgba(163, 113, 247, 0.4); }
.tier-trusted     { background: rgba(63, 185, 80, 0.15); color: var(--green); border: 1px solid rgba(63, 185, 80, 0.4); }
.tier-established { background: rgba(88, 166, 255, 0.15); color: var(--accent); border: 1px solid rgba(88, 166, 255, 0.4); }
.tier-novice      { background: rgba(210, 153, 34, 0.15); color: var(--yellow); border: 1px solid rgba(210, 153, 34, 0.4); }
.tier-unverified  { background: rgba(139, 148, 158, 0.15); color: var(--text-muted); border: 1px solid var(--border); }

/* Sybil severity */
.sybil-flag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}
.severity-high { background: rgba(248, 81, 73, 0.15); color: var(--red); border: 1px solid rgba(248, 81, 73, 0.4); }
.severity-mid  { background: rgba(210, 153, 34, 0.15); color: var(--yellow); border: 1px solid rgba(210, 153, 34, 0.4); }
.severity-low  { background: rgba(139, 148, 158, 0.15); color: var(--text-muted); border: 1px solid var(--border); }

.caps-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.capability-chip {
  font-size: 11px;
  padding: 1px 8px;
  border-radius: 10px;
  background: rgba(88, 166, 255, 0.10);
  color: var(--accent);
  border: 1px solid rgba(88, 166, 255, 0.25);
  font-family: monospace;
}

/* Challenge card */
.challenge-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 8px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}
.challenge-card .c-title { font-size: 14px; font-weight: 600; }
.challenge-card .c-meta { font-size: 12px; color: var(--text-muted); }
.challenge-card .c-meta span { margin-right: 12px; }
.challenge-card .c-state { display: flex; gap: 6px; align-items: center; }

.state-open      { background: rgba(210, 153, 34, 0.15); color: var(--yellow); padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.state-escalated { background: rgba(248, 81, 73, 0.15); color: var(--red); padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.state-resolved  { background: rgba(63, 185, 80, 0.15); color: var(--green); padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }

/* Sybil card */
.sybil-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 8px;
}
.sybil-card .s-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
.sybil-card .s-agent { font-family: monospace; font-size: 12px; }
.sybil-card .s-type { font-weight: 600; font-size: 13px; }
.sybil-card .s-details { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.sybil-card .s-related { font-family: monospace; font-size: 11px; color: var(--text-muted); margin-top: 4px; word-break: break-all; }

/* Stats */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.stat-card .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; }
.stat-card .value { font-size: 24px; font-weight: 600; margin-top: 6px; }
.stat-card .sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.tier-bars { display: grid; gap: 8px; margin-top: 12px; }
.tier-bar {
  display: grid;
  grid-template-columns: 110px 1fr 40px;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}
.tier-bar .bar-track {
  background: var(--surface-2);
  border-radius: 4px;
  height: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.tier-bar .bar-fill { height: 100%; border-radius: 4px; }
.tier-bar .bar-count { text-align: right; color: var(--text-muted); }

/* Explainer */
.explainer {
  background: rgba(88, 166, 255, 0.06);
  border: 1px solid rgba(88, 166, 255, 0.2);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 16px;
}
.explainer-title { font-size: 13px; font-weight: 600; color: var(--accent); margin-bottom: 6px; }
.explainer-body { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 100;
  justify-content: center;
  align-items: flex-start;
  padding-top: 40px;
  overflow-y: auto;
}
.modal-overlay.active { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 780px;
  max-width: 95vw;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  margin-bottom: 40px;
}

.modal h2 {
  font-size: 18px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal .close {
  cursor: pointer;
  font-size: 20px;
  color: var(--text-muted);
  background: none;
  border: none;
}

.detail-grid {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 6px 12px;
  font-size: 13px;
  margin-bottom: 16px;
}
.detail-grid dt { color: var(--text-muted); }
.detail-grid dd { word-break: break-all; }

.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0 12px;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.score-breakdown {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
  margin-top: 8px;
}
.score-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  text-align: center;
}
.score-item .label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; }
.score-item .val   { font-size: 16px; font-weight: 600; margin-top: 4px; }
.score-item.positive .val { color: var(--green); }
.score-item.negative .val { color: var(--red); }

.row-list > .list-row {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.row-list > .list-row:last-child { border-bottom: none; }
.row-list .small-did { font-family: monospace; font-size: 12px; color: var(--text-muted); }

.loading { text-align: center; color: var(--text-muted); padding: 40px; }
.empty   { text-align: center; color: var(--text-muted); padding: 40px; font-size: 14px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.mono { font-family: monospace; font-size: 12px; }