:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --card-2: #232732;
  --text: #e8eaed;
  --muted: #9aa3b2;
  --accent: #fc4c02; /* Strava orange */
  --accent-2: #ff7a3d;
  --border: #2a2f3a;
  --ok: #34d399;
  --err: #f87171;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--accent-2); }
a:visited { color: #ffad85; }
a:hover { color: #ffd0ba; }
a:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }

header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}
header h1 { font-size: 18px; margin: 0; }
header h1::before {
  content: ""; display: inline-block; width: 10px; height: 10px;
  background: var(--accent); border-radius: 50%; margin-right: 8px;
  vertical-align: middle;
}

main { padding: 24px; max-width: 1200px; margin: 0 auto; }
footer { padding: 24px; color: var(--muted); text-align: center; }

.hidden { display: none !important; }

.tabs {
  display: flex; gap: 8px; margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.tab {
  padding: 10px 16px; border: 0; border-bottom: 2px solid transparent;
  background: transparent; color: var(--muted); cursor: pointer; font-size: 14px;
}
.tab-link { text-decoration: none; }
.tab:hover, .tab.active { color: var(--text); border-bottom-color: var(--accent); }
.tab-panel { min-width: 0; }
.section-heading { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.section-heading h2 { margin-bottom: 8px; }
.segment-actions { margin-top: 12px; }
.btn.danger { color: var(--err); }
.btn.danger:hover { border-color: var(--err); }
button:disabled { opacity: 0.55; cursor: not-allowed; }

@media (max-width: 700px) {
  .section-heading { flex-direction: column; }
  .tabs { overflow-x: auto; }
  .tab { white-space: nowrap; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}
.card h2 { margin-top: 0; font-size: 16px; }
.card p { color: var(--muted); margin-top: 0; }

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 800px) {
  .grid { grid-template-columns: 1fr; }
}
.span-2 { grid-column: 1 / -1; }

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 800px) {
  .settings-grid { grid-template-columns: 1fr; }
}
.settings-grid h3 { margin-top: 0; font-size: 14px; }

.stack { display: flex; flex-direction: column; gap: 8px; }
.stack input { width: 100%; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.row label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.row label input[type="number"] { width: 80px; }
details summary {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; font-size: 13px; list-style: none;
}
details summary::-webkit-details-marker { display: none; }
details summary::before { content: "\25B8"; font-size: 16px; }
details[open] > summary::before { content: "\25BE"; }
details summary h2 { margin: 0; }

.btn {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card-2);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  font-size: 14px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: white; }
.btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }

input, select {
  background: var(--card-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
}
input[type="file"] { padding: 6px; }

.segment-id-list { display: grid; gap: 12px; }
.segment-id-row { display: grid; grid-template-columns: 32px minmax(160px, 0.7fr) minmax(0, 2fr); gap: 8px; align-items: start; }
.segment-id-row > label { padding-top: 9px; }
.segment-details { min-width: 0; padding: 7px 0; }
.segment-details > a { display: inline-block; font-weight: 600; overflow-wrap: anywhere; }
.segment-stats { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 7px 0 0; }
.segment-stats div { display: flex; gap: 5px; font-size: 12px; }
.segment-stats dt { color: var(--muted); }
.segment-stats dd { margin: 0; color: var(--text); font-variant-numeric: tabular-nums; }
@media (max-width: 600px) {
  .segment-id-row { grid-template-columns: 24px minmax(0, 1fr); }
  .segment-details { grid-column: 2; padding-top: 0; }
}

.mapping-form {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr 80px auto;
  gap: 8px;
  margin-bottom: 12px;
}
@media (max-width: 700px) {
  .mapping-form { grid-template-columns: 1fr; }
}

table {
  width: 100%; border-collapse: collapse; margin-top: 8px;
  font-size: 13px;
}
th, td {
  padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }

.sensor-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  margin: 6px 0; background: var(--card-2);
}
.sensor-row code { color: var(--accent-2); }

.status-ok { color: var(--ok); }
.status-error, .status-no_mapping, .status-no_activity { color: var(--err); }

.muted { color: var(--muted); }