:root {
  --bg: #0b1220;
  --bg-elev: #121a2b;
  --card: #162033;
  --line: #243049;
  --text: #e8eef7;
  --muted: #8b9bb4;
  --accent: #4aa3f0;
  --accent-2: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --chart-1: #4aa3f0;
  --chart-2: #34d399;
  --chart-3: #fbbf24;
  --chart-4: #f87171;
  --glow-1: rgba(74, 163, 240, 0.16);
  --glow-2: rgba(52, 211, 153, 0.08);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

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

html, body { min-height: 100%; }

body {
  font-family: "DM Sans", sans-serif;
  background:
    radial-gradient(1200px 500px at 10% -10%, var(--glow-1), transparent 50%),
    radial-gradient(900px 400px at 100% 0%, var(--glow-2), transparent 45%),
    var(--bg);
  color: var(--text);
}

button, input, select { font-family: inherit; }

.app {
  display: grid;
  grid-template-columns: 270px 1fr;
  min-height: 100vh;
}

.sidebar {
  padding: 28px 20px;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.brand { display: flex; gap: 12px; align-items: center; }

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--accent), var(--chart-1));
  font-weight: 700;
}

.brand-kicker {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.brand h1 { font-size: 18px; font-weight: 700; }

.nav { display: flex; flex-direction: column; gap: 8px; }

.nav-item {
  text-align: left;
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
}

.nav-item:hover,
.nav-item.is-active {
  color: var(--text);
  background: var(--card);
  border-color: var(--line);
}

.meta-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  font-size: 13px;
  line-height: 1.7;
}

.meta-card span {
  display: inline-block;
  min-width: 74px;
  color: var(--muted);
}

.sidebar-foot {
  margin-top: auto;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.main { padding: 28px 32px 40px; }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 24px;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.topbar h2 { font-size: 28px; }

.topbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }

select, input[type="search"], input[type="text"], input[type="number"] {
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
}

select:focus, input:focus { border-color: var(--accent); }

.btn {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  color: var(--text);
  background: var(--card);
}

.btn.primary {
  background: linear-gradient(145deg, var(--accent), var(--chart-1));
  border-color: transparent;
  font-weight: 600;
}

.btn.ghost:hover { border-color: var(--accent); }

.btn.danger {
  background: transparent;
  color: var(--danger);
  border-color: transparent;
}

.view { display: none; }
.view.is-visible { display: block; }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 16px;
}

.kpi, .panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent 40%), var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.kpi { padding: 18px; }

.kpi-label, .panel-head h3, .panel h3 {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.kpi-value, .insight-value {
  font-family: "JetBrains Mono", monospace;
  font-size: 26px;
  margin: 10px 0 6px;
}

.kpi-meta, .muted { color: var(--muted); font-size: 13px; }

.chart-grid, .insights-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}

.panel { padding: 16px 18px 10px; }
.span-8 { grid-column: span 8; }
.span-6 { grid-column: span 6; }
.span-4 { grid-column: span 4; }
.span-full { grid-column: 1 / -1; }

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.chip {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(52, 211, 153, 0.12);
  color: var(--accent-2);
}

.chip.down {
  background: rgba(248, 113, 113, 0.12);
  color: var(--danger);
}

.chart-wrap { height: 280px; padding: 8px 0 12px; }
.chart-wrap-sm { height: 260px; }
.chart-grid.compact .chart-wrap { height: 210px; }
.chart-grid.compact .chart-wrap-sm { height: 210px; }

.drop-zone {
  border: 1px dashed var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 14px;
  color: var(--muted);
  text-align: center;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.drop-zone.is-over {
  border-color: var(--accent);
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

.sheet-toolbar { display: flex; gap: 10px; margin-bottom: 8px; align-items: center; }
.sheet-toolbar input { flex: 1; }

.sheet-hint {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 12px;
}

.save-status {
  white-space: nowrap;
  font-size: 12px;
  color: var(--accent-2);
}

.sheet-wide { min-width: 2400px; }

.sheet th.sticky, .sheet td.sticky {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--bg-elev);
}

.sheet td.sticky { background: var(--card); }

.sheet .day-col {
  min-width: 52px;
  max-width: 58px;
  padding: 6px 4px;
  text-align: center;
}

.sheet .day-col input {
  padding: 6px 4px;
  text-align: center;
  font-family: "JetBrains Mono", monospace;
}

.sheet th.weekend, .sheet td.weekend { background: color-mix(in srgb, var(--chart-3) 12%, transparent); }
.sheet th.sunday, .sheet td.sunday { background: color-mix(in srgb, var(--chart-4) 14%, transparent); }

.theme-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
}

.preset-grid, .color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.preset-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  cursor: pointer;
  background: var(--bg-elev);
  color: var(--text);
  text-align: left;
}

.preset-card.is-on, .preset-card:hover { border-color: var(--accent); }

.swatches { display: flex; gap: 6px; margin-top: 8px; }
.swatches span {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: inline-block;
}

.color-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
}

.color-item input[type="color"] {
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.color-item input[type="text"] {
  width: 96px;
  font-family: "JetBrains Mono", monospace;
}

.color-item label { font-size: 13px; color: var(--muted); }

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  z-index: 20;
  display: none;
}

.toast.is-on { display: block; }

.sheet-scroll {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.sheet {
  width: 100%;
  border-collapse: collapse;
  min-width: 1100px;
}

.sheet th, .sheet td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 13px;
}

.sheet th {
  color: var(--muted);
  font-weight: 600;
  background: var(--bg-elev);
  position: sticky;
  top: 0;
}

.sheet tbody tr:hover { background: rgba(74, 163, 240, 0.06); }

.sheet input, .sheet select {
  width: 100%;
  padding: 8px 9px;
}

.sheet tfoot td {
  font-weight: 700;
  background: var(--bg-elev);
}

.calendar-panel { margin-top: 16px; }

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  padding: 12px 0 16px;
}

.cal-day {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px;
  min-height: 72px;
  background: var(--bg-elev);
}

.cal-day .d {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
}

.cal-day .n {
  font-family: "JetBrains Mono", monospace;
  font-size: 18px;
  margin-top: 6px;
  width: 100%;
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--text);
}

.cal-day.weekend { opacity: 0.85; }
.cal-day.zero { opacity: 0.45; }

.insights-grid .panel { grid-column: span 4; min-height: 140px; }

.insight-list {
  margin-top: 12px;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 1100px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  .kpi-grid, .chart-grid, .insights-grid { grid-template-columns: 1fr; }
  .span-8, .span-6, .span-4, .span-full, .insights-grid .panel { grid-column: span 1; }
  .topbar { flex-direction: column; align-items: flex-start; }
  .cal-grid { grid-template-columns: repeat(4, 1fr); }
}