:root {
  --bg: #f4f6f6;
  --surface: #ffffff;
  --surface-soft: #eef3f1;
  --line: #d8dfdd;
  --line-strong: #b8c4c0;
  --text: #23302d;
  --muted: #64736f;
  --teal: #087d73;
  --teal-dark: #065d56;
  --coral: #c94f3d;
  --amber: #d39a22;
  --green: #448b4f;
  --invalid: #eef0f1;
  --shadow: 0 16px 40px rgba(37, 49, 45, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="number"] {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1680px, 100%);
  margin: 0 auto;
  padding: 18px;
}

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

.topbar h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 750;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}

.secondary-button {
  min-height: 38px;
  padding: 0 14px;
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--text);
}

.secondary-button:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.workspace {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 16px;
}

.control-panel,
.main-panel,
.plot-panel,
.note-panel,
.status-banner {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.control-panel {
  position: sticky;
  top: 18px;
  align-self: start;
  padding: 16px;
}

.section-heading,
.panel-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.section-heading h2,
.panel-heading h2,
.note-panel h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 760;
}

.quiet-value {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.control-stack {
  display: grid;
  gap: 13px;
}

.control-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 80px;
  align-items: center;
  gap: 10px;
}

.control-row label {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.control-row label span:first-child {
  font-size: 13px;
  font-weight: 700;
}

.control-row label span:last-child {
  color: var(--muted);
  font-size: 11px;
}

.control-row input[type="range"] {
  width: 100%;
  accent-color: var(--teal);
}

.control-row input[type="number"] {
  width: 80px;
  min-height: 34px;
  padding: 6px 8px;
}

.main-panel {
  overflow: hidden;
}

.tabs {
  display: flex;
  gap: 4px;
  padding: 10px 10px 0;
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}

.tab-button {
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 6px 6px 0 0;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}

.tab-button.active {
  border-color: var(--line);
  background: var(--surface);
  color: var(--teal-dark);
}

.tab-panel {
  display: none;
  padding: 16px;
}

.tab-panel.active {
  display: block;
}

.status-banner {
  margin-bottom: 14px;
  padding: 12px 14px;
  border-color: rgba(201, 79, 61, 0.45);
  background: #fff6f3;
  color: #813325;
  box-shadow: none;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.kpi-card {
  min-height: 82px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.kpi-card .label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 720;
}

.kpi-card .value {
  margin-top: 6px;
  font-size: 21px;
  font-weight: 780;
  overflow-wrap: anywhere;
}

.kpi-card .unit {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.plot-grid {
  display: grid;
  gap: 14px;
  margin-bottom: 14px;
}

.plot-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.plot-panel,
.note-panel {
  padding: 14px;
}

.plot-canvas {
  display: block;
  width: 100%;
  height: 320px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfc;
}

.plot-canvas.tall {
  height: 420px;
}

.plot-canvas.wide {
  height: 500px;
}

.toolbar,
.select-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.toolbar label,
.select-grid label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 730;
}

.toolbar select,
.toolbar input[type="number"],
.select-grid select {
  min-height: 36px;
  min-width: 112px;
  padding: 6px 8px;
}

.select-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.select-grid.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.select-grid select {
  width: 100%;
}

.check-row {
  display: flex !important;
  grid-template-columns: auto !important;
  flex-direction: row;
  align-items: center;
  gap: 8px !important;
  min-height: 36px;
  padding-top: 19px;
}

.check-row input {
  accent-color: var(--teal);
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

dl {
  display: grid;
  grid-template-columns: minmax(96px, 1fr) minmax(80px, 1fr);
  gap: 8px 12px;
  margin: 0;
}

dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 730;
}

dd {
  margin: 0;
  text-align: right;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.tooltip {
  position: fixed;
  z-index: 20;
  max-width: 260px;
  padding: 8px 10px;
  border: 1px solid rgba(35, 48, 45, 0.18);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 26px rgba(35, 48, 45, 0.18);
  color: var(--text);
  font-size: 12px;
  pointer-events: none;
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }

  .control-stack {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }

  .kpi-grid {
    grid-template-columns: repeat(3, minmax(130px, 1fr));
  }
}

@media (max-width: 820px) {
  .app-shell {
    padding: 10px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .tabs {
    overflow-x: auto;
  }

  .control-stack,
  .plot-grid.two,
  .notes-grid {
    grid-template-columns: 1fr;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }

  .select-grid,
  .select-grid.two-col {
    grid-template-columns: 1fr;
  }

  .plot-canvas,
  .plot-canvas.tall,
  .plot-canvas.wide {
    height: 330px;
  }
}

@media (max-width: 520px) {
  .control-row {
    grid-template-columns: 1fr;
  }

  .control-row input[type="number"] {
    width: 100%;
  }

  .kpi-grid {
    grid-template-columns: 1fr;
  }
}