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

:root {
  --bg: #12141c;
  --panel: #1a1d28;
  --panel-2: #212531;
  --line: #2c3140;
  --text: #d7dce6;
  --dim: #8a92a6;
  --v: #4fb0ff;
  --i: #ffb347;
  --p: #57e389;
  --accent: #b48cff;
  --warn: #ff6b6b;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: radial-gradient(circle at 30% 0%, #171a24, #0e0f16);
  color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
}

.app {
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 1rem 1.25rem;
  gap: 0.75rem;
}

.topbar h1 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.topbar .sub {
  color: var(--dim);
  font-size: 0.85rem;
  margin-top: 0.15rem;
}

.main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 1rem;
  min-height: 0;
}

.scope-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
#scope {
  flex: 1;
  width: 100%;
  min-height: 0;
  border-radius: 8px;
  background: #0c0e15;
}
.legend {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--dim);
}
.lg-v { color: var(--v); }
.lg-i { color: var(--i); }
.lg-p { color: var(--p); }

.side {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 0;
  overflow-y: auto;
}

.controls {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem;
}
.ctl { margin-bottom: 0.7rem; }
.ctl:last-of-type { margin-bottom: 0.5rem; }
.ctl label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.82rem;
  color: var(--dim);
  margin-bottom: 0.3rem;
}
.ctl .val {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
input[type=range] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}
.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin-top: 0.6rem;
}
.presets button {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 0.4rem 0.3rem;
  border-radius: 7px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.presets button:hover {
  background: #2a3040;
  border-color: var(--accent);
}

.readouts {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.6rem 0.85rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem 0.9rem;
}
.ro {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.82rem;
  padding: 0.15rem 0;
}
.ro .k { color: var(--dim); }
.ro .u {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.ro.full { grid-column: 1 / -1; }
.ro-pf .u { font-size: 1.05rem; }

.triangle-wrap {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.6rem 0.85rem 0.85rem;
}
.triangle-wrap h3 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--dim);
  margin-bottom: 0.4rem;
}
#triangle {
  width: 100%;
  height: 150px;
  display: block;
}

.note {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  font-size: 0.83rem;
  color: var(--dim);
  line-height: 1.4;
}
.note strong { color: var(--text); }
.note .bad { color: var(--warn); }
.note .good { color: var(--p); }

@media (max-width: 820px) {
  .main { grid-template-columns: 1fr; }
  .side { flex-direction: row; flex-wrap: wrap; }
  .controls, .readouts, .triangle-wrap { flex: 1 1 260px; }
}