/* TUNNEL SENTINEL — shared theme */

:root {
  --bg: #0f1117;
  --card: #1a1d28;
  --border: #2a2d3a;
  --text: #e4e6ef;
  --muted: #6b7084;
  --accent1: #4cc9f0;
  --govern: #ef476f;
  --slider-track: #2a2d3a;
  --green: #06d6a0;
  --amber: #ffd166;
  --orange: #f9844a;
  --red: #ef476f;
  --lockout: #b388ff;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 2rem;
}

/* ---------- Nav ---------- */
.nav {
  max-width: 1200px;
  margin: 0 auto 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.nav .brand {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent1);
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nav-links a:hover { color: var(--text); }

.nav-links a.active { color: var(--accent1); }

.nav-links .disabled {
  color: #3f4353;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: default;
}

.nav-report {
  color: var(--red);
  border: 1px solid var(--red);
  border-radius: 6px;
  padding: 0.25rem 0.7rem;
  font-weight: 700;
  text-decoration: none;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nav-report:hover {
  background: var(--red);
  color: var(--bg);
}

/* ---------- Header ---------- */
.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---------- Footer text ---------- */
.subtitle {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 1.5rem;
}

.refs {
  color: var(--muted);
  font-size: 0.7rem;
  text-align: center;
  margin-top: 0.5rem;
  opacity: 0.7;
}

/* ---------- Shared layout (module pages) ---------- */
.layout {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.5rem;
}

/* ---------- Controls Panel ---------- */
.controls {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  height: fit-content;
}

.control-group label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.control-group label .value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.control-group input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--slider-track);
  outline: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent1);
  cursor: pointer;
  border: 2px solid var(--card);
  box-shadow: 0 0 0 2px var(--accent1);
  transition: box-shadow 0.15s;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 4px var(--accent1);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

/* ---------- Chart Panel ---------- */
.chart-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.custom-legend {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.custom-legend .legend-item {
  font-size: 0.8rem;
  font-weight: 700;
  cursor: default;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

.checkbox-row input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-radius: 3px;
  background: var(--bg);
  cursor: pointer;
  position: relative;
}

.checkbox-row input[type="checkbox"]:checked {
  background: #06d6a0;
  border-color: #06d6a0;
}

.checkbox-row input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 1px;
  width: 4px;
  height: 7px;
  border: solid var(--bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.chart-wrap {
  position: relative;
  width: 100%;
  height: 420px;
}

canvas { width: 100% !important; height: 100% !important; }

/* ---------- Ruling Criterion ---------- */
.ruling {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.ruling strong {
  color: var(--govern);
  font-size: 1rem;
}

.tarp-evidence {
  margin-top: 0.35rem;
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--muted);
  text-align: left;
  white-space: pre-line;
}

/* ---------- Field verification + trend ---------- */
.verify-panel,
.trend-panel {
  max-width: 1200px;
  margin: 0 auto 1.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.verify-head,
.trend-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
}

.verify-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.verify-inputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.verify-outputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.vo {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.vo-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.vo-val {
  font-size: 0.95rem;
  font-weight: 700;
}

.verify-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.verify-actions {
  display: flex;
  gap: 0.5rem;
}

.verify-actions button {
  background: var(--bg);
  color: var(--accent1);
  border: 1px solid var(--accent1);
  border-radius: 6px;
  padding: 0.45rem 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.verify-actions button:hover {
  background: var(--accent1);
  color: var(--bg);
}

.trend-chart-wrap {
  height: 300px;
}

.current-trend {
  margin-top: 0.75rem;
  border-top: 1px solid var(--border);
  padding-top: 0.5rem;
}

.cross-module {
  margin-top: 0.75rem;
  border: 1px solid var(--red);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.cross-module.hidden {
  display: none;
}

.ct-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.75rem;
  padding: 0.15rem 0;
}

.ct-label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
  font-size: 0.68rem;
}

.ct-val {
  color: var(--text);
  font-weight: 700;
}

/* ---------- Select control ---------- */
.select-group select {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
}

.select-group select:focus {
  outline: none;
  border-color: var(--accent1);
}

.dt-input {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 0.85rem;
  font-family: inherit;
}

.dt-input:focus {
  outline: none;
  border-color: var(--accent1);
}

.dt-input::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
}

input[type="file"].dt-input {
  padding: 0.35rem 0.5rem;
  font-size: 0.8rem;
}

input[type="file"].dt-input::file-selector-button {
  background: var(--border);
  color: var(--text);
  border: none;
  border-radius: 4px;
  padding: 0.25rem 0.6rem;
  margin-right: 0.5rem;
  cursor: pointer;
}

/* ---------- Support health grid + baseline ---------- */
.support-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.support-grid .select-group label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.baseline-group > label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.baseline-group > label .value {
  flex-shrink: 0;
}

.support-grid .select-group select {
  font-size: 0.8rem;
}

.control-group > .checkbox-row {
  margin-top: 0.75rem;
}

.baseline-group {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.baseline-info {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
  margin-top: 0.5rem;
}

.baseline-group .verify-actions {
  margin: 0.5rem 0;
}

/* ---------- Modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 1rem;
}

.modal.hidden {
  display: none;
}

.modal-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
}

.modal-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text);
}

.modal-box textarea.dt-input {
  resize: vertical;
  min-height: 3.5rem;
}

.modal-box .checkbox-row {
  margin-top: 0.5rem;
}

/* ---------- Engineer config page ---------- */
.config-grid {
  display: flex;
  gap: 0.75rem;
}

.config-grid label {
  flex: 1;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.config-grid input {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 0.85rem;
  font-family: inherit;
}

.config-grid input:focus {
  outline: none;
  border-color: var(--accent1);
}

.config-zone-row {
  display: flex;
  gap: 0.5rem;
}

.config-zone-row input {
  flex: 1;
}

.config-zone-row button {
  background: var(--bg);
  color: var(--accent1);
  border: 1px solid var(--accent1);
  border-radius: 6px;
  padding: 0.45rem 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.config-zone-row button:hover {
  background: var(--accent1);
  color: var(--bg);
}

.config-zone-note {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.4rem;
  line-height: 1.4;
}

.config-saved {
  font-size: 0.75rem;
}

.config-help {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 0.9rem;
}

.config-help strong {
  color: var(--text);
}

/* ---------- Event logger (Module 4) ---------- */
.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.ev-type {
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
  font-family: inherit;
}

.ev-type:hover {
  border-color: var(--accent1);
  color: var(--text);
}

.ev-type.active {
  border-color: var(--accent1);
  color: var(--bg);
  background: var(--accent1);
}

.rev-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
  font-family: inherit;
}

.rev-btn:hover {
  color: var(--text);
  border-color: var(--accent1);
}

.hidden {
  display: none;
}

.critical.hidden {
  display: none;
}

/* ---------- Event timeline ---------- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 320px;
  overflow-y: auto;
}

.tl-row {
  display: grid;
  grid-template-columns: 150px 1fr auto auto;
  gap: 0.75rem;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.7rem;
  font-size: 0.8rem;
}

.tl-extra {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  justify-content: flex-end;
  min-width: 120px;
}

.tl-op {
  color: var(--muted);
  font-size: 0.72rem;
}

.tl-time {
  color: var(--muted);
  font-size: 0.75rem;
}

.tl-param {
  font-weight: 700;
}

.tl-val {
  color: var(--accent1);
  font-weight: 700;
  text-align: right;
}

.tl-empty {
  color: var(--muted);
  font-size: 0.85rem;
  padding: 0.5rem 0;
}

/* ---------- Master Dashboard ---------- */
.dash {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
}

a.card:hover { border-color: var(--accent1); }

.card.planned { opacity: 0.55; }

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.module-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.chip {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.chip.green  { color: var(--green); }
.chip.amber  { color: var(--amber); }
.chip.orange { color: var(--orange); }
.chip.red    { color: var(--red); }
.chip.lockout { color: var(--lockout); }
.chip.muted  { color: var(--muted); }

.card-title {
  font-size: 0.9rem;
  font-weight: 700;
}

.card-desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
}

.open-link {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent1);
}

.critical {
  max-width: 1200px;
  margin: 1rem auto 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.critical .label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.critical .value {
  font-size: 0.9rem;
  font-weight: 700;
}

.critical .reasons {
  width: 100%;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ---------- Alarm panel (dashboard) ---------- */
.alarm-panel {
  border-color: var(--red);
  flex-direction: column;
  align-items: flex-start;
}

.alarm-panel.hidden {
  display: none;
}

.alarm-chain {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 600;
}

.alarm-panel .reasons {
  white-space: pre-line;
}

.alarm-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-top: 0.25rem;
}

.alarm-action {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text);
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0;
}

.alarm-action input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-radius: 3px;
  background: var(--bg);
  cursor: pointer;
  position: relative;
}

.alarm-action input[type="checkbox"]:checked {
  background: #06d6a0;
  border-color: #06d6a0;
}

.alarm-action input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 1px;
  width: 4px;
  height: 7px;
  border: solid var(--bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.alarm-ack {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  width: 100%;
  margin-top: 0.5rem;
}

.alarm-ack input {
  flex: 1;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 0.8rem;
  font-family: inherit;
}

.alarm-ack input:focus {
  outline: none;
  border-color: var(--accent1);
}

.alarm-ack button {
  background: var(--bg);
  color: var(--accent1);
  border: 1px solid var(--accent1);
  border-radius: 6px;
  padding: 0.45rem 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  white-space: nowrap;
}

.alarm-ack button:hover {
  background: var(--accent1);
  color: var(--bg);
}

.alarm-note {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.4;
  margin-top: 0.5rem;
}

/* ---------- Digital Twin (Module 7) ---------- */
.twin-wrap {
  max-width: 1200px;
  margin: 0 auto;
}

.twin-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.twin-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.twin-legend {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.twin-legend .lg {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.twin-legend .sw {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.twin-legend .sw.no-data {
  background: var(--slider-track);
  border: 1px dashed var(--border);
}

.twin-strip {
  display: flex;
  gap: 4px;
  margin-bottom: 0.5rem;
}

.strip-seg {
  flex: 1;
  height: 56px;
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  background: var(--slider-track);
  transition: transform 0.12s, box-shadow 0.12s;
}

.strip-seg:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.35);
}

.strip-seg.green   { background: var(--green); }
.strip-seg.amber   { background: var(--amber); }
.strip-seg.orange  { background: var(--orange); }
.strip-seg.red     { background: var(--red); }
.strip-seg.lockout { background: var(--lockout); }

.strip-seg.no-data {
  background: repeating-linear-gradient(45deg, var(--slider-track) 0 6px, var(--bg) 6px 12px);
}

.strip-seg.seg-critical {
  outline: 2px solid #ffffff;
  outline-offset: 1px;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.35);
}

.twin-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--muted);
}

.twin-popup {
  max-width: 720px;
}

.twin-overall {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.twin-overall .label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.twin-overall .chip {
  font-size: 1rem;
}

.twin-gov {
  font-size: 0.75rem;
  color: var(--muted);
}

.twin-modules {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.twin-row {
  display: grid;
  grid-template-columns: 110px 70px 1fr;
  gap: 0.75rem;
  align-items: baseline;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.7rem;
  font-size: 0.78rem;
}

.twin-name {
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.twin-evidence {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.35;
}

.twin-values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.twin-personnel {
  margin-bottom: 1rem;
}

.twin-events {
  margin-bottom: 1rem;
}

.twin-events .verify-title,
.twin-timeline-wrap .verify-title {
  display: block;
  margin-bottom: 0.5rem;
}

.twin-timeline-wrap .timeline {
  max-height: 260px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .layout {
    display: flex;
    flex-direction: column;
  }
  .layout .chart-panel { order: -1; }
  body { padding: 1rem; }
}