:root {
  --bg: #0a0e17;
  --panel: #121826;
  --panel-2: #1a2333;
  --border: #2a3548;
  --text: #eef2f7;
  --text-dim: #8b98ad;
  --navy: #101f44; /* Go-Ahead London primary */
  --accent: #205d9b; /* Go-Ahead London secondary blue */
  --accent-light: #67cae1;
  --pink: #ee577d;
  --accent-text: #ffffff;
  --critical: #ff4d4f;
  --high: #ff9142;
  --medium: #ffd23e;
  --low: #67cae1;
  --ok: #35d07f;
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  border-top: 4px solid var(--navy);
  padding: 14px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  height: 40px;
  flex-shrink: 0;
  border-radius: 8px;
  background: #ffffff;
  padding: 6px 10px;
  display: flex;
  align-items: center;
}
.brand-mark svg { height: 100%; width: auto; display: block; }

.brand {
  display: flex;
  flex-direction: column;
  margin-right: auto;
}
.brand .title { font-size: 1.15rem; font-weight: 700; letter-spacing: 0.02em; }
.brand .subtitle { font-size: 0.8rem; color: var(--text-dim); }

.summary-pills { display: flex; gap: 8px; flex-wrap: wrap; }
.pill {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px; font-weight: 700; font-size: 0.85rem;
  background: var(--panel-2); border: 1px solid var(--border);
}
.pill .dot { width: 9px; height: 9px; border-radius: 50%; }
.pill.critical .dot { background: var(--critical); }
.pill.high .dot { background: var(--high); }
.pill.medium .dot { background: var(--medium); }
.pill.low .dot { background: var(--low); }

.conn-status { font-size: 0.75rem; color: var(--text-dim); display: flex; align-items: center; gap: 6px; }
.conn-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }
.conn-dot.bad { background: var(--critical); }

button, input, select {
  font-family: inherit;
  font-size: 1rem;
}

.btn {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  min-height: 44px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 700; }
.btn.danger { background: var(--critical); color: #2a0000; border-color: var(--critical); font-weight: 700; }
.btn.small { padding: 6px 10px; min-height: 34px; font-size: 0.85rem; }
.btn.pin-toggle.active { background: var(--pink); border-color: var(--pink); color: #ffffff; font-weight: 700; }

.main-tabs {
  display: flex;
  gap: 4px;
  padding: 10px 20px 0;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.main-tabs .tab {
  padding: 12px 18px; border-radius: 10px 10px 0 0; cursor: pointer;
  color: var(--text-dim); border: 1px solid transparent; min-height: 44px; font-weight: 600;
}
.main-tabs .tab.active { color: var(--text); background: var(--panel-2); border-color: var(--border); border-bottom-color: var(--panel-2); }

.toolbar {
  padding: 14px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.toolbar input[type="search"], .select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 10px;
  min-width: 180px;
  min-height: 44px;
}

.chip-group { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
  min-height: 40px;
}
.chip.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 700; }

main { padding: 20px; max-width: 1400px; margin: 0 auto; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 14px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 6px solid var(--low);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card.critical { border-left-color: var(--critical); }
.card.high { border-left-color: var(--high); }
.card.medium { border-left-color: var(--medium); }
.card.low { border-left-color: var(--low); }
.card.stale { opacity: 0.7; }

.card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.route-badge {
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 4px 10px; font-weight: 800; font-size: 1rem; white-space: nowrap;
}
.type-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); font-weight: 700; }

.badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge { font-size: 0.7rem; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--text-dim); }
.badge.sev-critical { color: var(--critical); border-color: var(--critical); }
.badge.sev-high { color: var(--high); border-color: var(--high); }
.badge.sev-medium { color: var(--medium); border-color: var(--medium); }
.badge.sev-low { color: var(--low); border-color: var(--low); }
.badge.stale-badge { color: var(--ok); border-color: var(--ok); }

.message { font-size: 0.92rem; line-height: 1.4; color: var(--text); }
.meta { font-size: 0.78rem; color: var(--text-dim); display: flex; flex-wrap: wrap; gap: 10px; }

.card-actions { margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 8px; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-dim); }

/* -- Summary tab ------------------------------------------------------- */

.summary-heading { margin: 4px 0 4px; font-size: 1.4rem; }
.summary-note { color: var(--text-dim); font-size: 0.85rem; margin: 0 0 20px; max-width: 900px; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}
.stat-tile {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.stat-tile .stat-value { font-size: 1.8rem; font-weight: 800; line-height: 1; }
.stat-tile .stat-label { color: var(--text-dim); font-size: 0.78rem; margin-top: 8px; }
.stat-tile.tone-critical .stat-value { color: var(--critical); }
.stat-tile.tone-ok .stat-value { color: var(--ok); }

.summary-group-header {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  margin-bottom: 14px;
}
.summary-group-header h3 { margin: 0; font-size: 1.05rem; }

.group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}
.group-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  cursor: pointer;
  transition: border-color 0.15s ease;
}
.group-card:hover { border-color: var(--accent); }
.group-card-top { display: flex; justify-content: space-between; align-items: flex-start; }
.group-card-title { font-weight: 800; font-size: 1.05rem; }
.group-card-subtitle { color: var(--text-dim); font-size: 0.78rem; }
.group-card-total { font-size: 1.6rem; font-weight: 800; }
.group-card-total.tone-critical { color: var(--critical); }
.group-card-metrics {
  display: flex; flex-wrap: wrap; gap: 10px 16px;
  font-size: 0.78rem; color: var(--text-dim); margin: 12px 0;
}
.group-card-metrics strong { color: var(--text); }
.group-card-footer {
  display: flex; justify-content: space-between; gap: 10px;
  font-size: 0.75rem; color: var(--text-dim); border-top: 1px solid var(--border); padding-top: 10px;
}

/* -- Pin panel / modal -------------------------------------------------- */

.watchlist-panel {
  position: fixed; top: 0; right: 0; height: 100%; width: min(420px, 100%);
  background: var(--panel); border-left: 1px solid var(--border);
  transform: translateX(100%); transition: transform 0.2s ease;
  z-index: 20; padding: 20px; overflow-y: auto;
}
.watchlist-panel.open { transform: translateX(0); }
.watchlist-panel h2 { margin-top: 0; }
.watchlist-panel .close-btn { float: right; }
.route-search-results { display: flex; flex-direction: column; gap: 6px; max-height: 240px; overflow-y: auto; margin-top: 8px; }
.route-result { display: flex; justify-content: space-between; align-items: center; padding: 8px 10px; background: var(--panel-2); border-radius: 8px; }
.watched-route { display: flex; justify-content: space-between; align-items: center; padding: 10px; background: var(--panel-2); border-radius: 8px; margin-bottom: 8px; }
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 15; display: none; }
.overlay.open { display: block; }

.modal {
  position: fixed; inset: 0; display: none; align-items: center; justify-content: center; z-index: 30;
}
.modal.open { display: flex; }
.modal-box { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 24px; width: min(400px, 90vw); }
.modal-box h3 { margin-top: 0; }
.modal-box input { width: 100%; background: var(--panel-2); border: 1px solid var(--border); color: var(--text); padding: 10px; border-radius: 8px; min-height: 44px; margin-top: 6px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

label { font-size: 0.85rem; color: var(--text-dim); }

@media (max-width: 640px) {
  header { padding: 10px 14px; }
  main { padding: 12px; }
  .toolbar { padding: 10px 14px; }
  .main-tabs { padding: 8px 14px 0; }
}