:root {
  --bg: #0b1020;
  --card: #121a33;
  --text: #e7ecff;
  --muted: #aab4e6;
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 20% -10%, rgba(110, 130, 255, 0.22), transparent 70%),
              radial-gradient(900px 500px at 90% 0%, rgba(120, 255, 210, 0.12), transparent 65%),
              var(--bg);
  color: var(--text);
}

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: rgba(9, 14, 30, 0.92);
  border-right: 1px solid var(--border);
  padding: 16px 10px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
}

.sidebar-title {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.sidebar-toggle {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 6px 8px;
  cursor: pointer;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.02);
  transition: all 0.2s ease;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border);
}

.nav-link.active,
.nav-link[aria-current="page"] {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border);
}

.nav-icon {
  font-size: 18px;
  width: 22px;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-label {
  font-size: 14px;
  white-space: nowrap;
}

.app-content {
  flex: 1;
  min-width: 0;
}

body.sidebar-collapsed .sidebar {
  width: 64px;
  padding: 16px 6px;
}

body.sidebar-collapsed .sidebar-title,
body.sidebar-collapsed .nav-label {
  display: none;
}

body.sidebar-collapsed .sidebar-header {
  justify-content: center;
}

body.sidebar-collapsed .nav-link {
  justify-content: center;
  padding: 10px 8px;
}

body.sidebar-collapsed .nav-icon {
  font-size: 20px;
}

code { color: #d8deff; }

.header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 22px 10px 22px;
  align-items: flex-end;
}

h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.2px;
}

.sub {
  margin: 6px 0 0 0;
  color: var(--muted);
  font-size: 13px;
}

.controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

label {
  display: grid;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

select {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 10px;
  outline: none;
}

.btn {
  cursor: pointer;
  background: rgba(255, 255, 255, 0.10);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 10px;
}

.btn:hover { background: rgba(255, 255, 255, 0.14); }

.grid {
  padding: 12px 22px 22px 22px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: rgba(18, 26, 51, 0.86);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 14px 8px 14px;
  backdrop-filter: blur(6px);
}

.card.full { grid-column: 1 / -1; }

h2 {
  margin: 0 0 10px 0;
  font-size: 14px;
  color: #dfe6ff;
  font-weight: 600;
}

.chart { height: 420px; }

.sparks {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.spark {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
}

.spark .title {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.spark .name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.spark .sum {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

.spark .plot { height: 110px; }

.footer {
  padding: 0 22px 18px 22px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  flex-wrap: wrap;
}

@media (max-width: 1100px) {
  .sparks { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .chart { height: 380px; }
  .sparks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}