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

:root {
  --bg: #0f1117;
  --bg2: #161b27;
  --bg3: #1e2536;
  --border: #2a3144;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --accent: #ff6b35;
  --accent2: #f97316;
  --green: #4ade80;
  --red: #f87171;
  --blue: #60a5fa;
  --purple: #a78bfa;
  --yellow: #fbbf24;
  --radius: 12px;
  --font: 'Inter', system-ui, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

/* NAV */
nav {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-weight: 700;
  font-size: 18px;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.3px;
}
.nav-links a {
  color: var(--text2);
  text-decoration: none;
  font-size: 14px;
  transition: color .15s;
}
.nav-links a:hover { color: var(--text); }

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
}

/* PAGE HEADER */
.page-header {
  margin-bottom: 32px;
}
.page-header h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

/* STATS BAR */
.stats-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.stat-pill {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 20px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.stat-val {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}
.stat-lbl {
  font-size: 12px;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .5px;
}

/* ACTIVITY GRID */
.activity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.activity-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color .15s, transform .15s;
}
.activity-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.sport-running .card-sport-badge { color: var(--accent); }
.sport-cycling .card-sport-badge { color: var(--blue); }
.sport-swimming .card-sport-badge { color: var(--purple); }

.card-sport-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.card-date {
  font-size: 13px;
  color: var(--text2);
  margin-top: -8px;
}
.card-main-stat {
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.card-dist {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1;
}
.card-dist-unit {
  font-size: 18px;
  color: var(--text2);
  font-weight: 400;
}
.card-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.card-stat { text-align: center; }
.cs-val {
  font-size: 16px;
  font-weight: 600;
}
.cs-lbl {
  font-size: 10px;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .4px;
  margin-top: 2px;
}
.card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  font-size: 11px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
  color: var(--text2);
}

/* EMPTY STATE */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text2);
}
.empty-state code {
  display: block;
  margin-top: 16px;
  background: var(--bg3);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--accent);
  display: inline-block;
}

/* ACTIVITAT DETAIL */
.act-header {
  margin-bottom: 28px;
}
.back-link {
  color: var(--text2);
  text-decoration: none;
  font-size: 13px;
  transition: color .15s;
  display: inline-block;
  margin-bottom: 12px;
}
.back-link:hover { color: var(--text); }
.act-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.act-sport {
  font-size: 22px;
  font-weight: 700;
}
.act-date {
  font-size: 14px;
  color: var(--text2);
}

/* METRICS GRID */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 32px;
}
.metric-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
}
.metric-card.big {
  grid-column: span 2;
}
.m-val {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--text);
}
.metric-card.big .m-val {
  font-size: 34px;
}
.m-lbl {
  font-size: 11px;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-top: 4px;
}

/* SECTION */
.section {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}
.section h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .6px;
}

/* MAPA */
#map {
  height: 380px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg3);
}
.no-data {
  color: var(--text2);
  padding: 20px;
  text-align: center;
}

/* CHARTS */
.chart-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.tab-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 12px;
  font-family: var(--font);
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
}
.tab-btn:hover { border-color: var(--accent); color: var(--text); }
.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.chart-container {
  height: 280px;
  position: relative;
}

/* LAPS TABLE */
.table-wrap {
  overflow-x: auto;
}
.laps-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.laps-table th {
  text-align: left;
  padding: 8px 12px;
  color: var(--text2);
  font-weight: 500;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.laps-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.laps-table tbody tr:hover { background: var(--bg3); }
.laps-table tbody tr:last-child td { border-bottom: none; }
.lap-num {
  font-weight: 600;
  color: var(--accent);
  font-size: 13px;
}
.pace {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ACT ACTIONS (botons a la capçalera) */
.act-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.btn-action {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all .15s;
}
.btn-action:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-action span {
  color: var(--accent);
  font-weight: 700;
  font-family: monospace;
}

/* MODAL JSON */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal.hidden { display: none; }
.modal-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 900px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.modal-header > div {
  display: flex;
  gap: 8px;
}
.modal-header button {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 12px;
  transition: all .15s;
}
.modal-header button:hover {
  border-color: var(--accent);
  color: var(--accent);
}
#json-content {
  flex: 1;
  overflow: auto;
  padding: 20px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  white-space: pre;
  tab-size: 2;
}

/* SECTION HEAD AMB PESTANYES */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.split-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg3);
  padding: 4px;
  border-radius: 8px;
}
.split-tab {
  background: transparent;
  border: none;
  color: var(--text2);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: all .15s;
}
.split-tab:hover { color: var(--text); }
.split-tab.active {
  background: var(--bg2);
  color: var(--accent);
}

.split-panel.hidden, .hidden { display: none; }

#desnivell-controls label {
  font-size: 12px;
  color: var(--text2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
#desnivell-controls select {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 8px;
  font-family: var(--font);
  cursor: pointer;
}

.desnivell-help {
  font-size: 12px;
  color: var(--text2);
  margin-bottom: 12px;
  padding: 8px 12px;
  background: var(--bg);
  border-radius: 6px;
  border-left: 2px solid var(--accent);
}

/* SEGMENTS TABLE */
.segments-table .tipus-pujada td.pendent-cell { color: var(--red); }
.segments-table .tipus-baixada td.pendent-cell { color: var(--green); }
.segments-table .tipus-pla td.pendent-cell { color: var(--text2); }

.seg-range {
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--text2);
}

.pendent-cell {
  min-width: 110px;
}
.pendent-bar {
  width: 60px;
  height: 5px;
  background: var(--bg3);
  border-radius: 3px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
  overflow: hidden;
}
.pendent-fill {
  height: 100%;
  border-radius: 3px;
}
.pendent-fill.tipus-pujada { background: var(--red); }
.pendent-fill.tipus-baixada { background: var(--green); }
.pendent-fill.tipus-pla { background: var(--text2); }
.pendent-val {
  font-weight: 600;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.segments-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.segments-summary .pill {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
}
.segments-summary .pill.tipus-pujada { color: var(--red); border-color: rgba(248,113,113,0.3); }
.segments-summary .pill.tipus-baixada { color: var(--green); border-color: rgba(74,222,128,0.3); }
.segments-summary .pill.tipus-pla { color: var(--text2); }

@media (max-width: 600px) {
  main { padding: 20px 16px; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .metric-card.big { grid-column: span 1; }
  .activity-grid { grid-template-columns: 1fr; }
}

/* ZONES DE FREQÜÈNCIA CARDÍACA */
.hr-zones-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}
.hr-zone-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.hr-zone-name {
  font-size: 13px;
  font-weight: 500;
  width: 140px;
  color: var(--text);
  line-height: 1.3;
}
.hr-zone-bar-bg {
  flex: 1;
  height: 24px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
}
.hr-zone-bar-fill {
  height: 100%;
  border-radius: 4px 0 0 4px;
  transition: width 0.3s ease;
  opacity: 0.85;
}
.hr-zone-bar-fill.z1 { background: #38bdf8; }
.hr-zone-bar-fill.z2 { background: var(--green); }
.hr-zone-bar-fill.z3 { background: var(--yellow); }
.hr-zone-bar-fill.z4 { background: #fb923c; }
.hr-zone-bar-fill.z5 { background: var(--red); }

.hr-zone-val-pct {
  position: absolute;
  left: 12px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.9);
}
.hr-zone-val-time {
  font-size: 13px;
  font-weight: 600;
  width: 70px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.hr-zones-meta {
  font-size: 11px;
  color: var(--text2);
  margin-top: 12px;
  text-align: right;
  font-style: italic;
}