:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e2229;
  --border: #2a2f3a;
  --text: #e8eaed;
  --muted: #9aa4b2;
  --accent: #4f8cff;
  --green: #33c46a;
  --amber: #e8b13a;
  --red: #e05a5a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f5f7;
    --panel: #ffffff;
    --panel-2: #f0f1f4;
    --border: #dde1e6;
    --text: #1b1f27;
    --muted: #5b6472;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  padding: 24px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
}

h1 { font-size: 1.4rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 0; }

.clock { color: var(--muted); font-variant-numeric: tabular-nums; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}

.card .value { font-size: 1.8rem; font-weight: 700; }
.card .label { color: var(--muted); font-size: 0.8rem; margin-top: 2px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.filters { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.chip {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}

.chip.active { background: var(--accent); color: white; border-color: var(--accent); }

.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  text-decoration: none;
}
.btn:hover { border-color: var(--accent); }

.range-label {
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge-reservation { background: rgba(79,140,255,0.15); color: var(--accent); }

input[type="month"], input[type="date"] {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
}

table { width: 100%; border-collapse: collapse; min-width: 600px; }

th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  white-space: nowrap;
}

th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; }

tr:hover td { background: var(--panel-2); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  margin-right: 4px;
}

.badge-occupied { background: rgba(51,196,106,0.15); color: var(--green); }
.badge-free { background: rgba(154,164,178,0.15); color: var(--muted); }
.badge-tomorrow { background: rgba(232,177,58,0.15); color: var(--amber); }
.badge-clean { background: rgba(224,90,90,0.15); color: var(--red); }

.locked {
  padding: 30px 10px;
  text-align: center;
  color: var(--muted);
}
.locked p { margin: 0 0 12px; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  padding: 10px 20px;
  font-size: 0.95rem;
}

/* ---- Charts ---- */
.chart-wrap { position: relative; height: 280px; width: 100%; }
.chart-wrap-sm { height: 200px; }

/* ---- Calendar / tape chart ---- */
.cal-label {
  font-weight: 600;
  min-width: 140px;
  text-align: center;
}

.calendar-legend {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--muted);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  display: inline-block;
}

.legend-free { background: var(--panel-2); border: 1px solid var(--border); }
.legend-occupied { background: var(--accent); }
.legend-turn { background: var(--amber); }

.tape-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

#tapeChart { border-collapse: collapse; min-width: unset; }
#tapeChart th, #tapeChart td { padding: 0; border: 1px solid var(--border); white-space: nowrap; }

.tape-room-col {
  background: var(--panel);
  padding: 4px 10px !important;
  font-size: 0.78rem;
  text-align: left;
  z-index: 1;
  min-width: 110px;
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tape-day-col {
  width: 22px;
  min-width: 22px;
  text-align: center;
  font-size: 0.68rem;
  color: var(--muted);
  padding: 4px 0 !important;
}

.tape-cell {
  width: 22px;
  min-width: 22px;
  height: 22px;
}

.tape-free { background: var(--panel-2); }
.tape-occupied { background: var(--accent); }
.tape-turn { background: var(--amber); }

/* ---- Insights ---- */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.insight-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  text-align: center;
}

.insight-value { font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.insight-label { color: var(--muted); font-size: 0.78rem; margin-top: 4px; }

.insights-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.insight-col h3 {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 10px;
  font-weight: 600;
}

.ranked-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: rank;
}

.ranked-list li {
  counter-increment: rank;
  display: flex;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.ranked-list li::before {
  content: counter(rank) ".";
  color: var(--muted);
  margin-right: 8px;
  font-size: 0.8rem;
}

.ranked-list li:last-child { border-bottom: none; }
.ranked-value { color: var(--muted); font-variant-numeric: tabular-nums; }
.muted-note { color: var(--muted); font-size: 0.85rem; font-style: italic; }

/* ---- Mobile ---- */
@media (max-width: 640px) {
  body { padding: 12px; }

  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 14px;
  }

  h1 { font-size: 1.15rem; }
  .clock { font-size: 0.8rem; }

  .cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 16px;
  }

  .card { padding: 10px 12px; }
  .card .value { font-size: 1.4rem; }
  .card .label { font-size: 0.72rem; }

  .panel { padding: 12px; margin-bottom: 14px; border-radius: 8px; }

  .panel-header { flex-direction: column; align-items: stretch; }

  .filters { width: 100%; }

  .chip, .btn {
    padding: 9px 14px;
    font-size: 0.85rem;
  }

  .range-label {
    flex: 1 1 auto;
  }
  .range-label input[type="date"] { flex: 1; width: 100%; }

  #applyRange, #clearRange { width: 100%; }

  input[type="month"], input[type="date"] {
    padding: 9px 10px;
    font-size: 16px; /* prevents iOS zoom-on-focus */
  }

  th, td { padding: 10px 8px; font-size: 0.85rem; }

  .btn-primary { width: 100%; }

  .chart-wrap { height: 220px; }
  .chart-wrap-sm { height: 160px; }
  .insights-cols { grid-template-columns: 1fr; }
  .cal-label { min-width: unset; flex: 1; }
}