:root {
  --bg: #0b1117;
  --bg-elevated: #121920;
  --bg-panel: #121920;
  --bg-panel-strong: #161e27;
  --grid-line: rgba(130, 164, 191, 0.14);
  --text: #e8f1f7;
  --text-dim: #9bb1c2;
  --accent: #3fd0c9;
  --accent-2: #f0a948;
  --danger: #f16b68;
  --success: #71da8e;
  --warning: #ffce6a;
  --border: rgba(140, 176, 199, 0.18);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
  --radius: 18px;
  --font-main: "Segoe UI Variable", "Bahnschrift", "Trebuchet MS", sans-serif;
  --font-mono: "Consolas", "SFMono-Regular", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(330px, 380px) 1fr;
  gap: 18px;
  min-height: 100vh;
  padding: 18px;
}

.sidebar,
.main-column {
  display: grid;
  gap: 18px;
  align-content: start;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel,
.panel {
  padding: 16px 18px;
}

.hero-panel h1,
.viewer-toolbar h2 {
  margin: 4px 0 10px;
  font-size: 1.45rem;
  line-height: 1.15;
}

.hero-panel p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.45;
}

.panel-copy {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.45;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.section-head h2,
.chart-card h3 {
  margin: 0;
  font-size: 1rem;
}

.subtle {
  color: var(--text-dim);
  font-size: 0.82rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.pill.neutral {
  background: rgba(130, 164, 191, 0.15);
  color: var(--text-dim);
}

.pill.pass {
  background: rgba(113, 218, 142, 0.18);
  color: var(--success);
}

.pill.fail {
  background: rgba(241, 107, 104, 0.2);
  color: var(--danger);
}

.mode-grid,
.toggle-grid,
.action-grid {
  display: grid;
  gap: 10px;
}

.mode-card {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(10, 20, 32, 0.72);
  cursor: pointer;
}

.mode-card input {
  margin-right: 8px;
}

.mode-card span {
  display: inline-block;
  font-weight: 700;
}

.mode-card small {
  display: block;
  margin-top: 6px;
  color: var(--text-dim);
  line-height: 1.35;
}

.geometry-fields {
  display: grid;
  gap: 12px;
}

.point-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  background: rgba(7, 16, 26, 0.66);
}

.point-card h3 {
  margin: 0 0 10px;
  font-size: 0.95rem;
}

.field-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

label span {
  display: block;
  margin-bottom: 6px;
  color: var(--text-dim);
  font-size: 0.8rem;
}

input[type="number"],
select {
  width: 100%;
  border: 1px solid rgba(143, 179, 201, 0.22);
  border-radius: 10px;
  background: rgba(3, 10, 18, 0.8);
  color: var(--text);
  padding: 9px 10px;
}

input[type="number"]:focus,
select:focus {
  outline: 1px solid rgba(63, 208, 201, 0.6);
  border-color: rgba(63, 208, 201, 0.45);
}

.switch-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 38px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(8, 17, 28, 0.62);
}

.switch-row span {
  margin: 0;
  color: var(--text);
  font-size: 0.88rem;
}

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

button {
  border: 1px solid rgba(143, 179, 201, 0.24);
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(8, 18, 29, 0.72);
  color: var(--text);
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(63, 208, 201, 0.42);
  background: rgba(16, 31, 48, 0.86);
}

button.primary {
  background: linear-gradient(135deg, rgba(63, 208, 201, 0.22), rgba(240, 169, 72, 0.22));
  border-color: rgba(63, 208, 201, 0.35);
}

.viewer-panel {
  display: grid;
  gap: 12px;
  min-height: 540px;
}

.viewer-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
}

.viewer-readout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.readout-block {
  min-width: 120px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(7, 16, 26, 0.7);
  border: 1px solid var(--border);
}

.readout-label {
  display: block;
  color: var(--text-dim);
  font-size: 0.76rem;
  margin-bottom: 4px;
}

.viewer {
  position: relative;
  min-height: 440px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0d141b;
}

.viewer canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.viewer-hint {
  color: var(--text-dim);
  font-size: 0.82rem;
}

.status-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(280px, 1.18fr);
  gap: 18px;
}

.status-banner {
  min-height: 48px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(10, 19, 30, 0.68);
  line-height: 1.4;
}

.status-banner.pass {
  border-color: rgba(113, 218, 142, 0.4);
  color: var(--success);
}

.status-banner.fail {
  border-color: rgba(241, 107, 104, 0.42);
  color: var(--danger);
}

.status-banner.warn {
  border-color: rgba(255, 206, 106, 0.42);
  color: var(--warning);
}

.warning-list {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--text-dim);
  line-height: 1.45;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metric-card {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(8, 16, 25, 0.72);
}

.metric-card .label {
  display: block;
  color: var(--text-dim);
  font-size: 0.76rem;
  margin-bottom: 6px;
}

.metric-card strong {
  font-size: 1rem;
}

.metric-card.alert {
  border-color: rgba(241, 107, 104, 0.36);
}

.charts-panel {
  display: grid;
  gap: 14px;
}

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

.chart-card {
  min-height: 240px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(8, 16, 25, 0.72);
}

.chart-card.wide {
  grid-column: 1 / -1;
}

.chart-card canvas {
  width: 100%;
  height: 185px;
  display: block;
}

@media (max-width: 1260px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

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

  .viewer-readout,
  .metrics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1500px) {
  .chart-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .app-shell {
    padding: 12px;
    gap: 12px;
  }

  .compact-grid,
  .field-grid,
  .action-grid,
  .viewer-readout,
  .metrics-grid,
  .chart-grid {
    grid-template-columns: 1fr;
  }

  .viewer-toolbar {
    grid-template-columns: 1fr;
    display: grid;
  }
}