:root {
  --bg: #0a0b0d;
  --bg-elev: #131519;
  --bg-elev-2: #1b1e24;
  --border: #26292f;
  --text: #e8eaed;
  --text-dim: #8b92a0;
  --text-faint: #565b66;
  --accent: #ff4d2e;
  --accent-dim: #ff4d2e33;
  --best: #22c55e;
  --record: #b026ff;
  --gold: #e8b923;
  --silver: #b8bec9;
  --bronze: #c97a3d;
  --danger: #ff4d2e;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  background-image:
    linear-gradient(180deg, rgba(255,77,46,0.06), transparent 220px);
}

.hidden { display: none !important; }

button, input {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

a { color: inherit; }

/* ---------- Login ---------- */

#login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 340px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.login-brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.login-brand .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 10px var(--accent);
}

.login-brand h1 {
  font-size: 18px;
  letter-spacing: 0.06em;
  font-weight: 700;
  margin: 0;
  text-transform: uppercase;
}

.login-sub {
  color: var(--text-dim);
  font-size: 13px;
  margin: 0 0 24px;
}

.field {
  margin-bottom: 14px;
}

.field label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.field input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.15s;
}

.field input:focus {
  border-color: var(--accent);
}

.btn {
  width: 100%;
  background: var(--accent);
  color: #0a0b0d;
  border: none;
  border-radius: 6px;
  padding: 11px 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: filter 0.15s, transform 0.05s;
}

.btn:hover { filter: brightness(1.1); }
.btn:active { transform: scale(0.99); }
.btn:disabled { opacity: 0.5; cursor: default; }

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  font-weight: 600;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-faint); }

.btn-inline { width: auto; padding: 6px 12px; font-size: 12px; }

.btn-danger-ghost {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  font-weight: 600;
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
}
.btn-danger-ghost:hover { filter: brightness(1.15); }

.error-msg {
  color: var(--danger);
  font-size: 13px;
  margin: 10px 0 0;
  min-height: 16px;
}

/* ---------- App shell ---------- */

#app-view { min-height: 100vh; }

header.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10,11,13,0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.brand .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.brand span.name {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 14px;
}

.user-box {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-dim);
}

nav.tabs {
  display: flex;
  gap: 4px;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

nav.tabs button {
  background: none;
  border: none;
  color: var(--text-dim);
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

nav.tabs button:hover { color: var(--text); }

nav.tabs button.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

.view { display: none; }
.view.active { display: block; }

.empty-state {
  color: var(--text-faint);
  font-size: 13px;
  padding: 40px 0;
  text-align: center;
}

/* ---------- Cards / lists ---------- */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.session-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
}
.session-row:last-child { border-bottom: none; }
.session-row:hover { background: var(--bg-elev-2); }

.session-row .left {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.session-row .track {
  font-weight: 700;
  font-size: 14px;
}

.session-row .meta {
  font-size: 12px;
  color: var(--text-dim);
}

.session-row .right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.session-row .best {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--best);
}

.chevron {
  color: var(--text-faint);
  font-size: 12px;
  transition: transform 0.15s;
}
.session-row.open .chevron { transform: rotate(90deg); }

.laps-detail {
  display: none;
  padding: 4px 16px 14px;
  background: var(--bg);
}
.laps-detail.open { display: block; }

table.laps {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
}

table.laps th {
  text-align: left;
  color: var(--text-faint);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 8px 8px;
  border-bottom: 1px solid var(--border);
}

table.laps td {
  padding: 7px 8px;
  border-bottom: 1px solid var(--border);
}
table.laps tr:last-child td { border-bottom: none; }

.lap-best { color: var(--best); font-weight: 700; }
.lap-delta { color: var(--text-dim); }
.lap-delta.zero { color: var(--best); }

/* ---------- Leaderboard ---------- */

.track-select-row {
  margin-bottom: 16px;
}

select#track-select {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 12px;
  border-radius: 6px;
  min-width: 220px;
  outline: none;
}

.lb-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
}
.lb-row:last-child { border-bottom: none; }

.lb-pos {
  width: 26px;
  text-align: center;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--text-faint);
}
.lb-row.p1 .lb-pos { color: var(--gold); }
.lb-row.p2 .lb-pos { color: var(--silver); }
.lb-row.p3 .lb-pos { color: var(--bronze); }

.lb-name {
  flex: 1;
  font-weight: 600;
  font-size: 14px;
}

.lb-time {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
}
.lb-row.p1 .lb-time { color: var(--record); }

.track-record-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  margin-bottom: 12px;
  border: 1px solid var(--record);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(176,38,255,0.10), transparent);
}
.track-record-banner .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--record);
  font-weight: 700;
}
.track-record-banner .time {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--record);
}
.track-record-banner .who {
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- Admin: gestione piste ---------- */

.card-pad { padding: 20px; }

#admin-form-title {
  margin: 0 0 4px;
  font-size: 15px;
}

.admin-form-hint {
  color: var(--text-dim);
  font-size: 12px;
  margin: 0 0 18px;
}

.field-row {
  display: flex;
  gap: 12px;
}
.field-row .field { flex: 1; }

.form-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
}
.form-actions .error-msg { margin: 0; }

.admin-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
}
.admin-row:last-child { border-bottom: none; }

.admin-row .left {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.admin-row .name {
  font-weight: 700;
  font-size: 14px;
}

.admin-row .coords {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-row .actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

#esp-sync-card { margin-top: 16px; }

.esp-sync-status {
  font-size: 13px;
  color: var(--text-dim);
  margin: 12px 0 0;
  min-height: 16px;
}
.esp-sync-status.error { color: var(--danger); }
.esp-sync-status.ok { color: var(--best); }

@media (max-width: 560px) {
  header.top { padding: 12px 16px; }
  nav.tabs { padding: 0 16px; }
  main { padding: 16px; }
  .session-row .meta { display: none; }
}