:root {
  color-scheme: light dark;
  --bg: #0b1220;
  --bg-soft: #111a2e;
  --fg: #e6edf7;
  --fg-muted: #9aa7bd;
  --accent: #22d3ee;
  --accent-2: #a855f7;
  --swim: #38bdf8;
  --bike: #a855f7;
  --run: #f59e0b;
  --brick: #22d3ee;
  --strength: #64748b;
  --danger: #ef4444;
  --ok: #22c55e;
  --border: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(255, 255, 255, 0.04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
}

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

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.topbar {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0b1220 0%, #0a111f 100%);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
}

.brand-row {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--accent);
  padding: 0.3rem 0.7rem;
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 999px;
}

.brand-sub { color: var(--fg-muted); font-size: 0.92rem; }

.session-chip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.hidden { display: none !important; }
.muted { color: var(--fg-muted); font-size: 0.92rem; }

.btn {
  display: inline-block;
  padding: 0.55rem 0.95rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--fg);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 0.06s ease, border-color 0.15s ease,
    background 0.15s ease;
}
.btn:hover { border-color: rgba(255, 255, 255, 0.2); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #0b1220;
  border-color: transparent;
}
.btn.btn-ghost { background: transparent; border-color: var(--border); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

main { padding: 2rem 0 4rem; }

.view { animation: fade 0.2s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.auth-card {
  max-width: 520px;
  margin: 3rem auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}
.auth-card h1 { margin-top: 0; }

.auth-form { display: flex; flex-direction: column; gap: 0.85rem; margin-top: 1rem; }
.auth-form label,
.analysis-form label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--fg-muted);
}
.auth-form input, .auth-form select, .auth-form textarea,
.analysis-form input, .analysis-form select, .analysis-form textarea {
  background: #05090f;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 0.85rem;
  font: inherit;
  width: 100%;
}
.auth-status { margin: 0; min-height: 1.2rem; font-size: 0.88rem; }
.auth-status.error { color: var(--danger); }
.auth-status.ok { color: var(--ok); }

.banner {
  margin-top: 1.5rem;
  padding: 0.85rem 1rem;
  background: rgba(168, 85, 247, 0.1);
  border: 1px solid rgba(168, 85, 247, 0.35);
  border-radius: 12px;
  font-size: 0.9rem;
  color: var(--fg-muted);
}
.banner strong { color: var(--fg); }
.banner code {
  background: rgba(255, 255, 255, 0.08);
  padding: 0 0.3rem;
  border-radius: 5px;
}
.demo-actions { margin-top: 0.75rem; }

.tabs {
  display: flex;
  gap: 0.35rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
  overflow-x: auto;
}
.tab {
  background: transparent;
  color: var(--fg-muted);
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.75rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.tab:hover { color: var(--fg); }
.tab.active { color: var(--fg); border-bottom-color: var(--accent); }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fade 0.2s ease; }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.kpi {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}
.kpi-label { color: var(--fg-muted); font-size: 0.85rem; }
.kpi-value { font-size: 1.9rem; font-weight: 700; margin-top: 0.3rem; }

.panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.25rem;
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 1rem;
}
.panel-header h2 { margin: 0; font-size: 1.05rem; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; } }

.chart-wrap svg { width: 100%; height: auto; display: block; }

.activity-list { display: flex; flex-direction: column; }
.activity-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--border);
  font-size: 0.9rem;
}
.activity-row:last-child { border-bottom: none; }
.pill {
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.pill.swim { background: rgba(56, 189, 248, 0.18); color: var(--swim); }
.pill.bike { background: rgba(168, 85, 247, 0.18); color: var(--accent-2); }
.pill.run { background: rgba(245, 158, 11, 0.18); color: var(--run); }
.pill.brick { background: rgba(34, 211, 238, 0.18); color: var(--brick); }
.pill.strength, .pill.other {
  background: rgba(100, 116, 139, 0.18);
  color: var(--strength);
}

.athlete-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
}
.athlete-card {
  background: #05090f;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.12s ease;
}
.athlete-card:hover { border-color: rgba(34, 211, 238, 0.4); transform: translateY(-1px); }
.athlete-card h3 { margin: 0 0 0.25rem; font-size: 1rem; }
.athlete-card .meta { color: var(--fg-muted); font-size: 0.85rem; }
.athlete-card .chips {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.athlete-card .chips span {
  background: rgba(255, 255, 255, 0.05);
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--fg-muted);
}

.club-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}
.club-summary .kpi { background: #05090f; }
.club-members {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.5rem;
}
.club-member {
  background: #05090f;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.55rem 0.8rem;
  font-size: 0.9rem;
}
.club-member.linked { border-color: rgba(34, 197, 94, 0.4); }
.club-member .meta { color: var(--fg-muted); font-size: 0.8rem; }

.analysis-form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.9rem;
  margin-top: 1rem;
}
.analysis-form label.full { grid-column: 1 / -1; }
.form-actions { grid-column: 1 / -1; display: flex; align-items: center; gap: 1rem; }
@media (max-width: 720px) { .analysis-form { grid-template-columns: 1fr; } }

.analysis-section { margin-top: 1rem; }
.analysis-section h3 {
  font-size: 0.8rem;
  margin: 1.1rem 0 0.35rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.analysis-section ul { margin: 0; padding-left: 1.25rem; }
.analysis-section li { margin-bottom: 0.4rem; }
.analysis-section .evidence {
  color: var(--fg-muted);
  font-size: 0.85rem;
  font-style: italic;
}
.confidence { font-size: 0.72rem; padding: 0.05rem 0.5rem; border-radius: 999px; margin-left: 0.4rem; }
.confidence.low { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.confidence.medium { background: rgba(245, 158, 11, 0.15); color: var(--run); }
.confidence.high { background: rgba(34, 197, 94, 0.15); color: var(--ok); }

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  margin-top: 3rem;
}