.estimator-site-header {
  position: static;
  width: 100%;
  min-height: 88px;
  padding-inline: max(32px, calc((100vw - 1220px) / 2)); /* matches the main site header (--max: 1220px) */
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, .16);
  background: rgba(7, 18, 32, .82);
  color: #fff;
  box-shadow: 0 12px 34px rgba(0, 0, 0, .14);
  backdrop-filter: blur(16px);
}

.estimator-site-header .identity {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  min-height: 48px;
  color: inherit;
  text-decoration: none;
}

.estimator-site-header .identity-mark {
  display: grid;
  place-items: center;
  width: 39px;
  height: 39px;
  overflow: hidden;
  border: 1px solid #111820;
  border-radius: 50%;
  background: #101d2b;
}

.estimator-site-header .identity-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 20%;
}

.estimator-site-header .identity-portrait {
  width: 39px;
  height: 39px;
  overflow: hidden;
  border: 1px solid #111820;
  border-radius: 50%;
  background: #101d2b;
  object-fit: cover;
  object-position: 50% 20%;
}

.estimator-site-header .identity-copy {
  display: grid;
  gap: 3px;
}

.estimator-site-header .identity-copy strong {
  color: #fff;
  font-size: 14px;
  letter-spacing: -.01em;
}

.estimator-site-header .identity-copy small {
  color: rgba(255, 255, 255, .58);
  font-family: "Fira Code", monospace;
  font-size: 8px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.estimator-site-header .desktop-nav { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.estimator-site-header .desktop-nav a { display: inline-flex; align-items: center; min-height: 46px; color: rgba(255, 255, 255, .86); font-size: 14px; font-weight: 600; text-decoration: none; transition: color .2s ease, transform .2s ease; }
.estimator-site-header .desktop-nav a:hover, .estimator-site-header .desktop-nav a:focus-visible { color: #8ddbd4; transform: translateY(-1px); }
.estimator-site-header .desktop-nav .nav-contact { gap: 10px; min-height: 44px; padding: 0 18px; border: 1px solid rgba(255, 255, 255, .48); border-radius: 999px; color: #fff; transition: background .2s ease, color .2s ease; }
.estimator-site-header .desktop-nav .nav-contact:hover, .estimator-site-header .desktop-nav .nav-contact:focus-visible { background: #111820; color: #fff; }

.field-panel.panel {
  position: relative;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
}

.text-button {
  min-height: 44px;
  margin-top: 12px;
  padding: 8px 12px;
  border: 1px solid #2d5873;
  border-radius: 8px;
  background: transparent;
  color: #c7eafa;
  cursor: pointer;
  font: 500 .74rem "Fira Code", monospace;
  transition: background-color .18s ease, transform .18s ease;
}

.text-button:hover:not(:disabled) { background: rgba(82, 214, 255, .1); }
.text-button:active:not(:disabled) { transform: scale(.98); }
.text-button:disabled { opacity: .48; cursor: not-allowed; }
.chart-note { margin-top: 8px; color: var(--muted); font-size: .72rem; }
.mode-tab:disabled, .icon-button:disabled { opacity: .5; cursor: wait; }

.field-comparison { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.field-comparison .field-stage { min-height: 0; }
.field-comparison .field-stage canvas { min-height: 320px; }
.comparison-lower { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 16px; align-items: start; }
.comparison-lower .error-stage { width: 100%; min-height: 0; }
.comparison-lower .error-stage canvas { height: auto; min-height: 0; aspect-ratio: 3.1 / 1; }
.comparison-controls { display: grid; gap: 12px; align-content: start; min-width: 0; padding: 14px; border: 1px solid #1e3854; border-radius: 13px; background: rgba(4, 14, 25, .42); }
.comparison-controls .field-tools { display: grid; justify-content: stretch; gap: 10px; }
.comparison-controls .mode-tabs { width: 100%; }
.comparison-controls .mode-tab { flex: 1; font-size: .84rem; }
.comparison-controls .forecast-controls { margin: 0; padding: 11px 12px; }
.comparison-controls .forecast-controls input { margin-top: 8px; }
.comparison-controls .horizon-scale { font-size: .58rem; }
.comparison-controls .playback-controls { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 0; }
.comparison-controls .icon-button svg { display: block; width: 18px; height: 18px; transform: translateX(-1px); }
.field-label { display: flex; justify-content: space-between; gap: 8px; padding: 10px 12px 0; color: var(--ink); font: 600 .78rem "Fira Code", monospace; }
.field-overlay { top: 42px; left: 13px; right: auto; }
.sensor-legend { position: absolute; top: 42px; right: 13px; display: flex; align-items: center; gap: 7px; padding: 5px 7px; border: 1px solid rgba(195, 222, 243, .35); border-radius: 7px; background: rgba(3, 13, 25, .78); box-shadow: 0 2px 10px rgba(0, 0, 0, .22); color: #fff; font: 500 .64rem "Fira Code", monospace; }
.sensor-legend-dot { width: 9px; height: 9px; flex: none; border: 1px solid #fff; border-radius: 50%; background: #52d6ff; box-shadow: 0 0 7px rgba(82, 214, 255, .75); }
.field-tools { display: flex; align-items: center; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.field-tools .mode-tabs { padding: 2px; }
.field-tools .mode-tab { min-height: 44px; padding: 5px 8px; font-size: .64rem; }
.method-intro { max-width: none; margin: 0 0 18px; color: #d5dfec; font-size: .94rem; line-height: 1.65; }
.back-link { color: #c7eafa; font: 500 .66rem "Fira Code", monospace; letter-spacing: .03em; text-decoration: none; text-transform: uppercase; }
.back-link:hover, .back-link:focus-visible { color: #fff; text-decoration: underline; }

.two-cylinder-footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 10px; padding: 26px 0 8px; border-top: 1px solid rgba(195, 222, 243, .22); color: rgba(215, 228, 245, .58); font: 500 .68rem "Fira Code", monospace; letter-spacing: .04em; text-transform: uppercase; }
.two-cylinder-footer a { display: inline-flex; align-items: center; min-height: 44px; color: inherit; text-decoration: none; }
.two-cylinder-footer a:hover, .two-cylinder-footer a:focus-visible { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.workspace { position: relative; }
.intro-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 32px; align-items: center; margin: 0 0 22px; }
.intro-copy .method-intro:last-child { margin-bottom: 0; }
.method-intro-figure { margin: 0; padding: 8px; border: 1px solid rgba(141, 219, 212, .28); border-radius: 10px; background: rgba(5, 15, 29, .64); box-shadow: 0 12px 30px rgba(2, 8, 22, .22); }
.method-intro-figure img { display: block; width: 100%; height: auto; border-radius: 5px; }
.panthalassa-section { max-width: 980px; margin: 42px auto 0; padding: 28px 0 32px; border-top: 1px solid rgba(195, 222, 243, .22); }
.panthalassa-section .eyebrow { margin-bottom: 8px; color: #8ddbd4; }
.panthalassa-section h2 { margin: 0 0 12px; color: #f5f8ff; font-size: clamp(1.25rem, 2.4vw, 1.8rem); letter-spacing: -.035em; line-height: 1.1; }
.panthalassa-section p { max-width: 900px; margin: 0 0 14px; color: #d5dfec; font-size: .92rem; line-height: 1.65; }
.panthalassa-section p:last-child { margin-bottom: 0; }

@media (max-width: 760px) {
  .estimator-site-header { min-height: 72px; padding-inline: 18px; }
  .estimator-site-header .identity-copy small { display: none; }
  .estimator-site-header .desktop-nav { gap: 10px; }
  .estimator-site-header .desktop-nav a { min-height: 44px; font-size: 12px; }
  .estimator-site-header .desktop-nav .nav-contact { padding-inline: 12px; }
  .field-comparison { grid-template-columns: 1fr; }
  .field-comparison .field-stage canvas { min-height: 280px; }
  .comparison-lower { grid-template-columns: 1fr; }
  .two-cylinder-footer { align-items: flex-start; flex-direction: column; gap: 10px; }
}

@media (max-width: 900px) {
  .field-panel .method-intro { max-width: none; }
  .intro-layout { grid-template-columns: minmax(0, 1fr); gap: 22px; }
}

@media (max-width: 560px) {
}

@media (min-width: 901px) {
  .app-shell { width: min(1800px, calc(100% - 32px)); }
  .workspace { grid-template-columns: 1fr; }
  .field-comparison { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
  .comparison-lower { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 18px; }
  .field-comparison .field-stage canvas { min-height: clamp(380px, 30vw, 560px); }
}

/* Keep x/y scaling faithful to the wide CFD domain; otherwise the cylinder and
   its nearby probes are visibly distorted on a tall canvas. */
.field-comparison .field-stage { min-height: 0; }
.field-comparison .field-stage canvas { height: auto; min-height: 0; aspect-ratio: 3.1 / 1; }

/* The plotted field is deliberately pale near zero, so the color scale needs a
   dark surface rather than pale text directly over the canvas. */
.legend { padding: 5px 7px; border: 1px solid rgba(195, 222, 243, .35); border-radius: 7px; background: rgba(3, 13, 25, .84); box-shadow: 0 2px 10px rgba(0, 0, 0, .22); color: #fff; }
.legend b { color: #fff; font-size: .86rem; font-weight: 600; white-space: nowrap; }
.legend i { width: 58px; }

.forecast-controls { margin: 0 0 18px; padding: 12px 14px; border: 1px solid #1e3854; border-radius: 10px; background: rgba(4, 14, 25, .42); }
.forecast-control-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.forecast-control-heading output { color: var(--cyan); font: 600 .76rem "Fira Code", monospace; }
.forecast-controls input { width: 100%; margin: 10px 0 0; accent-color: var(--cyan); }
.horizon-scale { display: flex; justify-content: space-between; gap: 12px; margin-top: 4px; color: var(--muted); font: .62rem "Fira Code", monospace; }
.error-stage .legend i { background: linear-gradient(90deg, #e0e8e5, #d05345); }
.method-intro-figure-link { display: block; border-radius: 5px; }
.method-intro-figure-link:focus-visible { outline: 2px solid #8ddbd4; outline-offset: 3px; }
.method-intro-figure-caption { margin: 6px 2px 0; color: var(--muted); font-size: .68rem; text-align: right; }