/* GeoLab v3.6 — full-width, reflow-safe student experiment workspace */
:root {
  --gl-ink: #131b16;
  --gl-muted: #657168;
  --gl-green: #285f43;
  --gl-green-2: #1f5239;
  --gl-rust: #c65032;
  --gl-amber: #b47e1c;
  --gl-line: #cdd5cc;
  --gl-line-soft: #dfe5de;
  --gl-paper: #fffef9;
  --gl-surface: #f4f7f1;
  --gl-input: #fff3c7;
  --gl-result: #f0f4ef;
}

html,
body,
.experiment-page {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}

.experiment-page {
  min-height: 100svh;
  color: var(--gl-ink);
  background-color: var(--gl-surface);
  background-image:
    linear-gradient(rgba(42, 74, 55, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 74, 55, .035) 1px, transparent 1px);
  background-size: 38px 38px;
  font-size: 15px;
}

.experiment-page *,
.experiment-page *::before,
.experiment-page *::after { box-sizing: border-box; }

.experiment-page .experiment-wide {
  width: calc(100% - 32px);
  max-width: 2160px;
  margin-inline: auto;
}

.experiment-page .experiment-topbar {
  min-height: 54px;
  height: 54px;
  background: rgba(255, 255, 252, .96);
  border-bottom: 1px solid var(--gl-line);
  backdrop-filter: blur(14px);
}

.experiment-page .experiment-topbar__inner { height: 54px; }
.experiment-page .experiment-brand { font-size: 14px; }
.experiment-page .experiment-topbar__nav { gap: 28px; font-size: 13px; }
.experiment-page .experiment-main { padding: 0 0 28px; min-width: 0; }

.experiment-page .experiment-overview {
  display: grid;
  grid-template-columns: minmax(440px, .82fr) minmax(720px, 1.18fr);
  align-items: end;
  gap: clamp(20px, 2vw, 40px);
  min-height: 126px;
  padding: 14px 0 12px;
}

.experiment-page .experiment-overview__copy { min-width: 0; }
.experiment-page .experiment-back { margin: 0 0 7px; font-size: 11px; }
.experiment-page .experiment-overview .eyebrow { margin: 0 0 5px; font-size: 10px; letter-spacing: .19em; }
.experiment-page .experiment-overview h1 {
  margin: 0;
  font-size: clamp(34px, 2.55vw, 52px);
  line-height: .98;
  letter-spacing: -.055em;
}
.experiment-page .experiment-overview__copy > p:last-child {
  max-width: 720px;
  margin: 8px 0 0;
  color: #4e5b52;
  font-size: 14px;
  line-height: 1.45;
}
.experiment-page .experiment-overview__side { display: grid; gap: 8px; min-width: 0; }
.experiment-page .constant-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--gl-line);
  border-radius: 13px;
  background: rgba(255, 254, 249, .94);
}
.experiment-page .constant-strip > span { min-width: 0; padding: 10px 13px 9px; }
.experiment-page .constant-strip b { font-size: 14px; line-height: 1.1; }
.experiment-page .constant-strip small { margin-top: 4px; font-size: 8px; line-height: 1.2; letter-spacing: .11em; }
.experiment-page .workspace-readiness {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--gl-line);
  border-radius: 11px;
  background: rgba(255, 254, 249, .85);
}
.experiment-page .workspace-readiness article { min-width: 0; padding: 7px 13px; }
.experiment-page .workspace-readiness span { font-size: 8px; }
.experiment-page .workspace-readiness strong { margin-top: 3px; font-size: 11px; }

.experiment-page .experiment-shell { min-width: 0; }
.experiment-page .experiment-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 12px;
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid var(--gl-line);
  border-radius: 13px;
  background: rgba(255, 254, 249, .98);
  box-shadow: 0 12px 30px rgba(37, 52, 42, .05);
}
.experiment-page .experiment-meta-fields {
  display: grid;
  grid-template-columns: minmax(260px, 1.2fr) minmax(150px, .34fr) minmax(240px, .9fr);
  gap: 8px;
  min-width: 0;
}
.experiment-page .experiment-meta-fields label { min-width: 0; }
.experiment-page .experiment-meta-fields label > span { margin-bottom: 4px; font-size: 9px; }
.experiment-page .experiment-meta-fields input {
  width: 100%;
  min-width: 0;
  height: 42px;
  padding-inline: 12px;
  font-size: 14px;
}
.experiment-page .toolbar-actions { display: flex; gap: 7px; min-width: max-content; }
.experiment-page .toolbar-actions .button { min-height: 42px; padding: 0 15px; font-size: 13px; white-space: nowrap; }

.experiment-page .workspace-progress {
  display: grid;
  grid-template-columns: minmax(250px, auto) minmax(240px, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 44px;
  margin-top: 8px;
  padding: 6px 11px;
  border: 1px solid var(--gl-line);
  border-radius: 11px;
  background: rgba(255, 254, 249, .92);
}
.experiment-page .workspace-progress__copy strong { font-size: 12px; }
.experiment-page .workspace-progress__copy span { font-size: 10px; line-height: 1.25; }
.experiment-page .workspace-progress__track { height: 7px; }

.experiment-page .experiment-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(440px, .78fr);
  gap: 12px;
  align-items: stretch;
  min-width: 0;
  margin-top: 8px;
}
.experiment-page .data-panel,
.experiment-page .analysis-panel {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--gl-line);
  border-radius: 14px;
  background: var(--gl-paper);
  box-shadow: 0 14px 32px rgba(37, 52, 42, .045);
}
.experiment-page .data-panel { display: flex; flex-direction: column; }
.experiment-page .analysis-panel { display: flex; flex-direction: column; }

.experiment-page .panel-heading {
  min-height: 88px;
  padding: 13px 15px 11px;
  gap: 12px;
  border-bottom: 1px solid var(--gl-line);
}
.experiment-page .panel-heading .eyebrow { margin-bottom: 6px; font-size: 9px; }
.experiment-page .panel-heading h2 { font-size: clamp(21px, 1.35vw, 28px); line-height: 1.05; }
.experiment-page .panel-heading__hint { max-width: 680px; margin-top: 8px; font-size: 11px; line-height: 1.4; }
.experiment-page .panel-heading__tools { display: flex; align-items: center; justify-content: flex-end; gap: 9px; flex-wrap: wrap; }
.experiment-page .input-legend { font-size: 8px; }
.experiment-page .sample-counter strong { font-size: 22px; }
.experiment-page .sample-counter span { font-size: 8px; }

.experiment-page .desktop-sample-pager {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 32px;
  padding: 3px;
  border: 1px solid var(--gl-line);
  border-radius: 9px;
  background: #f7f9f5;
}
.experiment-page .desktop-sample-pager[hidden] { display: none; }
.experiment-page .desktop-sample-pager button {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--gl-ink);
  font-size: 21px;
  cursor: pointer;
}
.experiment-page .desktop-sample-pager button:hover:not(:disabled) { background: #e5ece4; }
.experiment-page .desktop-sample-pager button:disabled { opacity: .32; cursor: default; }
.experiment-page .desktop-sample-pager span { min-width: 62px; text-align: center; font: 700 10px/1.1 ui-monospace, SFMono-Regular, Menlo, monospace; }

.experiment-page .validation-summary { margin: 8px 9px 0; padding: 8px 10px; }
.experiment-page .matrix-wrap {
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
  min-height: 565px;
  max-height: min(680px, calc(100svh - 340px));
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  background: var(--gl-paper);
}
.experiment-page .experiment-matrix {
  width: 100%;
  min-width: 0;
  table-layout: fixed;
  border-collapse: separate;
  border-spacing: 0;
}
.experiment-page .experiment-matrix th,
.experiment-page .experiment-matrix td {
  min-width: 0;
  height: 48px;
  padding: 6px 7px;
  border-right: 1px solid var(--gl-line);
  border-bottom: 1px solid var(--gl-line);
  vertical-align: middle;
}
.experiment-page .experiment-matrix thead th {
  position: sticky;
  top: 0;
  z-index: 6;
  height: 46px;
  background: #e8eee7;
}
.experiment-page .experiment-matrix .row-label {
  width: clamp(178px, 14vw, 230px);
  max-width: 230px;
  padding-left: 12px;
  background: #f7f9f5;
  text-align: left;
}
.experiment-page .experiment-matrix thead .row-label { z-index: 8; background: #e8eee7; }
.experiment-page .experiment-matrix .row-label > span:first-child { font-size: 11px; line-height: 1.22; }
.experiment-page .experiment-matrix .unit { margin-top: 3px; font-size: 8px; line-height: 1.2; }
.experiment-page .experiment-matrix .section-row th,
.experiment-page .experiment-matrix .section-row td {
  height: 35px;
  padding-block: 5px;
  background: var(--gl-green);
  color: #fff;
}
.experiment-page .experiment-matrix .section-row th { width: auto; max-width: none; font-size: 9px; letter-spacing: .13em; }
.experiment-page .sample-heading { min-width: 0; gap: 5px; }
.experiment-page .sample-heading__copy { min-width: 0; }
.experiment-page .sample-heading b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 10px; }
.experiment-page .sample-heading small { font-size: 7px; }
.experiment-page .sample-heading button { flex: 0 0 27px; width: 27px; height: 27px; }
.experiment-page .matrix-input {
  display: block;
  width: 100%;
  min-width: 0;
  height: 37px;
  padding: 0 9px;
  border: 1px solid #d4ae49;
  border-radius: 7px;
  background: var(--gl-input);
  color: var(--gl-ink);
  font: 650 12px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-align: right;
}
.experiment-page .matrix-input:focus { outline: 3px solid rgba(40, 95, 67, .22); outline-offset: 1px; border-color: var(--gl-green); }
.experiment-page .matrix-input[aria-invalid="true"] { border-color: #a83625; background: #fff0e9; }
.experiment-page .matrix-result { display: block; min-width: 0; overflow: hidden; text-overflow: ellipsis; font-size: 12px; text-align: center; }
.experiment-page .cell-error { max-width: 100%; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 7px; }
.experiment-page .data-status { min-height: 43px; padding: 8px 12px; font-size: 11px; }
.experiment-page .mobile-sample-editor { display: none; }
.experiment-page .mobile-sample-nav {
  position: sticky;
  top: 58px;
  z-index: 35;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 42px;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--gl-line);
  background: rgba(250, 252, 248, .96);
  backdrop-filter: blur(14px);
}
.experiment-page .mobile-sample-nav button,
.experiment-page .mobile-sample-nav select { min-width: 0; min-height: 44px; border: 1px solid var(--gl-line); border-radius: 9px; background: #fff; color: var(--gl-ink); }
.experiment-page .mobile-sample-nav button { display: grid; place-items: center; cursor: pointer; }
.experiment-page .mobile-sample-nav button:disabled { opacity: .4; cursor: not-allowed; }
.experiment-page .mobile-sample-nav button svg { width: 19px; height: 19px; }
.experiment-page .mobile-sample-nav select { padding: 0 11px; font-size: 13px; font-weight: 700; }
.experiment-page .mobile-sample-card { display: grid; gap: 10px; padding: 12px; }
.experiment-page .mobile-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(132px, 34%);
  align-items: center;
  gap: 14px;
  min-height: 58px;
  padding: 8px 0 10px;
  border-bottom: 1px solid var(--gl-line-soft);
}
.experiment-page .mobile-field:last-child { border-bottom: 0; }
.experiment-page .mobile-field label { min-width: 0; font-size: 12px; font-weight: 760; line-height: 1.3; }
.experiment-page .mobile-field label small { display: block; margin-top: 3px; color: var(--gl-muted); font-size: 8px; font-weight: 560; line-height: 1.3; }
.experiment-page .mobile-field > div { min-width: 0; }
.experiment-page .mobile-field input {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 0 10px;
  border: 1px solid #d4ae49;
  border-radius: 8px;
  background: var(--gl-input);
  color: var(--gl-ink);
  font: 650 14px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-align: right;
}
.experiment-page .mobile-field input:focus { outline: 3px solid rgba(40, 95, 67, .22); outline-offset: 1px; border-color: var(--gl-green); }
.experiment-page .mobile-field output { min-width: 0; overflow-wrap: anywhere; color: var(--gl-ink); font: 720 13px/1.25 ui-monospace, SFMono-Regular, Menlo, monospace; text-align: right; }
.experiment-page .mobile-remove { min-height: 44px; border: 1px solid #d88f82; border-radius: 9px; background: #fffaf8; color: #a63d2c; font-size: 12px; font-weight: 800; cursor: pointer; }

.experiment-page .analysis-panel .panel-heading { min-height: 78px; }
.experiment-page .analysis-heading-actions { min-width: 0; flex-wrap: wrap; justify-content: flex-end; }
.experiment-page .chart-mode-switch { padding: 2px; border-color: var(--gl-line); background: #eef3ed; }
.experiment-page .chart-mode-switch button {
  min-height: 30px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #5a675e;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .05em;
  cursor: pointer;
}
.experiment-page .chart-mode-switch button[aria-pressed="true"] { background: var(--gl-ink); color: #fff; box-shadow: 0 4px 12px rgba(18, 29, 22, .13); }
.experiment-page .chart-mode-switch button:disabled { opacity: .42; cursor: not-allowed; box-shadow: none; }
.experiment-page .chart-frame {
  position: relative;
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
  min-height: 340px;
  height: clamp(340px, 35svh, 400px);
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 30%, rgba(255,255,255,.95), rgba(248,250,245,.78)),
    #fbfcf8;
}
.experiment-page .compaction-chart,
.experiment-page .compaction-chart-depth {
  display: block;
  width: 100%;
  height: 100%;
}
.experiment-page .compaction-chart-depth[hidden],
.experiment-page .compaction-chart[hidden] { display: none; }
.experiment-page .chart-empty { padding: 24px; text-align: center; }
.experiment-page .chart-empty strong { font-size: 15px; }
.experiment-page .chart-empty span { max-width: 340px; font-size: 12px; line-height: 1.45; }
.experiment-page .chart-depth-note {
  position: absolute;
  left: 10px;
  bottom: 9px;
  padding: 5px 8px;
  border: 1px solid rgba(40,95,67,.18);
  border-radius: 999px;
  background: rgba(255,254,249,.88);
  color: #4e6255;
  font-size: 8px;
  font-weight: 750;
  letter-spacing: .04em;
  pointer-events: none;
}
.experiment-page .chart-legend { min-height: 34px; padding: 7px 10px; gap: 11px; font-size: 8px; }
.experiment-page .chart-insights {
  padding: 8px 10px;
  border-top: 1px solid var(--gl-line-soft);
  background: #fbfcf8;
}
.experiment-page .chart-insights > span { min-width: 0; padding: 6px 8px; border: 1px solid var(--gl-line-soft); border-radius: 8px; background: #fff; }
.experiment-page .chart-insights small { display: block; color: var(--gl-muted); font-size: 7px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.experiment-page .chart-insights strong { display: block; margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; }
.experiment-page .chart-insights strong[data-state="valid"] { color: var(--gl-green); }
.experiment-page .chart-insights strong[data-state="warning"] { color: #9a6812; }
.experiment-page .analysis-results article { min-width: 0; padding: 10px; }
.experiment-page .analysis-results article span { font-size: 7px; line-height: 1.25; }
.experiment-page .analysis-results article strong { margin-top: 4px; font-size: 22px; }
.experiment-page .equation-box { padding: 10px 12px; }
.experiment-page .equation-box span { font-size: 7px; }
.experiment-page .equation-box code { margin-top: 5px; font-size: 10px; overflow-wrap: anywhere; }
.experiment-page .equation-box p { margin-top: 5px; font-size: 9px; }
.experiment-page .accessible-points summary { min-height: 39px; padding: 8px 12px; font-size: 10px; }

.experiment-page .notes-panel {
  margin-top: 8px;
  overflow: hidden;
  border: 1px solid var(--gl-line);
  border-radius: 11px;
  background: rgba(255, 254, 249, .94);
}
.experiment-page .notes-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 43px;
  padding: 8px 12px;
  cursor: pointer;
  list-style: none;
}
.experiment-page .notes-panel summary::-webkit-details-marker { display: none; }
.experiment-page .notes-panel summary::after { content: '+'; font-size: 18px; }
.experiment-page .notes-panel[open] summary::after { content: '−'; }
.experiment-page .notes-panel summary span { font-size: 10px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.experiment-page .notes-panel summary small { color: var(--gl-muted); font-size: 10px; }
.experiment-page .notes-panel textarea { display: block; width: calc(100% - 20px); margin: 0 10px 10px; min-height: 94px; resize: vertical; }
.experiment-page .form-message { max-width: 100%; }
.experiment-page .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (min-width: 1920px) {
  .experiment-page .experiment-wide { width: calc(100% - 40px); }
  .experiment-page .experiment-grid { grid-template-columns: minmax(0, 2fr) minmax(470px, .72fr); }
  .experiment-page .matrix-wrap { max-height: min(705px, calc(100svh - 340px)); }
}

@media (max-width: 1540px) {
  .experiment-page .experiment-wide { width: calc(100% - 24px); }
  .experiment-page .experiment-overview { grid-template-columns: minmax(390px, .72fr) minmax(650px, 1.28fr); }
  .experiment-page .experiment-grid { grid-template-columns: minmax(0, 1.62fr) minmax(410px, .78fr); }
  .experiment-page .experiment-matrix .row-label { width: 190px; }
  .experiment-page .toolbar-actions .button { padding-inline: 11px; }
}

@media (max-width: 1280px) {
  .experiment-page .experiment-overview { grid-template-columns: 1fr; align-items: start; min-height: auto; }
  .experiment-page .experiment-overview__side { grid-template-columns: 1.2fr .8fr; }
  .experiment-page .constant-strip { min-height: 58px; }
  .experiment-page .workspace-readiness { grid-template-columns: 1fr; }
  .experiment-page .workspace-readiness article { display: flex; justify-content: space-between; align-items: center; }
  .experiment-page .workspace-readiness strong { margin: 0; }
  .experiment-page .experiment-toolbar { grid-template-columns: 1fr; }
  .experiment-page .toolbar-actions { justify-content: flex-end; min-width: 0; }
  .experiment-page .experiment-grid { grid-template-columns: minmax(0, 1.42fr) minmax(390px, .78fr); }
}

@media (max-width: 1180px) {
  .experiment-page .experiment-grid { grid-template-columns: 1fr; }
  .experiment-page .matrix-wrap { display: none; }
  .experiment-page .mobile-sample-editor { display: block; }
  .experiment-page .desktop-sample-pager { display: none !important; }
  .experiment-page .analysis-panel { min-height: 620px; }
  .experiment-page .chart-frame { min-height: 390px; height: clamp(390px, 52svh, 470px); }
  .experiment-page .data-panel { overflow: visible; }
}

@media (max-width: 860px) {
  .experiment-page .experiment-wide { width: calc(100% - 20px); }
  .experiment-page .experiment-topbar__nav { gap: 14px; }
  .experiment-page .experiment-overview { padding-top: 10px; }
  .experiment-page .experiment-overview__side { grid-template-columns: 1fr; }
  .experiment-page .experiment-meta-fields { grid-template-columns: 1fr 1fr; }
  .experiment-page .experiment-meta-fields label:first-child { grid-column: 1 / -1; }
  .experiment-page .workspace-progress { grid-template-columns: 1fr; gap: 7px; }
  .experiment-page .toolbar-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .experiment-page .toolbar-actions .button { min-width: 0; padding-inline: 8px; }
  .experiment-page .panel-heading { align-items: flex-start; }
  .experiment-page .panel-heading__tools { justify-content: flex-start; }
}

@media (max-width: 620px) {
  .experiment-page { font-size: 16px; background-size: 28px 28px; }
  .experiment-page .experiment-wide { width: calc(100% - 16px); }
  .experiment-page .experiment-topbar { height: 52px; min-height: 52px; }
  .experiment-page .experiment-topbar__inner { height: 52px; }
  .experiment-page .experiment-topbar__nav a:first-child { display: none; }
  .experiment-page .experiment-overview h1 { font-size: 36px; }
  .experiment-page .experiment-overview__copy > p:last-child { font-size: 13px; }
  .experiment-page .constant-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .experiment-page .constant-strip > span:last-child { grid-column: 1 / -1; }
  .experiment-page .experiment-meta-fields { grid-template-columns: 1fr; }
  .experiment-page .experiment-meta-fields label:first-child { grid-column: auto; }
  .experiment-page .toolbar-actions { grid-template-columns: 1fr 1fr; }
  .experiment-page .toolbar-actions .primary { grid-column: 1 / -1; }
  .experiment-page .toolbar-actions .button { min-height: 46px; font-size: 12px; }
  .experiment-page .panel-heading { min-height: auto; padding: 13px; }
  .experiment-page .panel-heading h2 { font-size: 24px; }
  .experiment-page .analysis-heading-actions { width: 100%; justify-content: space-between; }
  .experiment-page .analysis-state { order: 3; width: 100%; text-align: center; }
  .experiment-page .chart-frame { min-height: 350px; height: 390px; }
  .experiment-page .analysis-results { grid-template-columns: 1fr; }
  .experiment-page .analysis-results article { display: grid; grid-template-columns: 1fr auto auto; align-items: baseline; gap: 8px; border-right: 0; }
  .experiment-page .analysis-results article strong { margin: 0; font-size: 21px; }
  .experiment-page .notes-panel summary { align-items: flex-start; flex-direction: column; gap: 4px; }
  .experiment-page .notes-panel summary::after { position: absolute; right: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .experiment-page *, .experiment-page *::before, .experiment-page *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media (forced-colors: active) {
  .experiment-page .matrix-input,
  .experiment-page .data-panel,
  .experiment-page .analysis-panel,
  .experiment-page .experiment-toolbar { border: 1px solid CanvasText; }
}

/* =========================================================
   GEOLAB v3.8 — ACADEMIC EXPERIMENT WORKSPACE REFINEMENT
   ========================================================= */

.experiment-page {
  --gl-ink: #13231b;
  --gl-muted: #66736d;
  --gl-green: #24533d;
  --gl-green-2: #173b2b;
  --gl-rust: #b94c30;
  --gl-amber: #9a6518;
  --gl-line: #cfd8d1;
  --gl-line-soft: #e1e7e2;
  --gl-paper: #ffffff;
  --gl-surface: #f4f6f1;
  --gl-input: #fff5ce;
  --gl-result: #eef3ef;
  --gl-font: "Segoe UI Variable", "Aptos", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --gl-mono: "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  min-width: 320px;
  background: var(--gl-surface);
  color: var(--gl-ink);
  font-family: var(--gl-font);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.experiment-page .experiment-wide {
  width: 100%;
  max-width: 1920px;
  padding-inline: clamp(16px, 1.8vw, 36px);
}

.experiment-page .experiment-topbar {
  position: sticky;
  inset-block-start: 0;
  z-index: 1000;
  height: 68px;
  min-height: 68px;
  border-bottom: 1px solid rgba(19, 35, 27, .12);
  background: rgba(244, 246, 241, .95);
  backdrop-filter: blur(16px);
}

.experiment-page .experiment-topbar__inner {
  display: flex;
  height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.experiment-page .experiment-brand {
  display: inline-flex;
  width: max-content;
  align-items: center;
  gap: 11px;
  color: var(--gl-ink);
}

.experiment-page .experiment-brand__mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--gl-green);
}

.experiment-page .experiment-brand__mark::before,
.experiment-page .experiment-brand__mark::after,
.experiment-page .experiment-brand__mark > span {
  display: none !important;
}

.experiment-page .experiment-brand__mark svg {
  width: 100%;
  height: 100%;
}

.experiment-page .experiment-brand__copy {
  display: grid;
  gap: 2px;
  line-height: 1.05;
}

.experiment-page .experiment-brand__copy strong {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.035em;
}

.experiment-page .experiment-brand__copy small {
  color: var(--gl-muted);
  font-family: var(--gl-mono);
  font-size: 8px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.experiment-page .experiment-topbar__nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.experiment-page .experiment-topbar__nav a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: #405049;
  font-size: 13px;
  font-weight: 750;
}

.experiment-page .experiment-topbar__nav a::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: 7px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms cubic-bezier(.2,.75,.25,1);
}

.experiment-page .experiment-topbar__nav a:hover::after,
.experiment-page .experiment-topbar__nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.experiment-page .experiment-main {
  padding-block-end: 28px;
}

.experiment-page .experiment-overview {
  display: grid;
  grid-template-columns: minmax(420px, .78fr) minmax(720px, 1.22fr);
  min-height: 152px;
  align-items: center;
  gap: clamp(30px, 3.5vw, 70px);
  padding-block: 20px 18px;
  border-bottom: 1px solid var(--gl-line);
}

.experiment-page .experiment-back {
  margin-bottom: 10px;
  color: var(--gl-muted);
  font-size: 11px;
  font-weight: 750;
}

.experiment-page .experiment-back:hover,
.experiment-page .experiment-back:focus-visible {
  color: var(--gl-green);
}

.experiment-page .experiment-overview .eyebrow,
.experiment-page .panel-heading .eyebrow {
  color: var(--gl-green);
  font-family: var(--gl-mono);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.experiment-page .experiment-overview h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 3.15vw, 64px);
  font-weight: 760;
  letter-spacing: -.06em;
  line-height: .98;
  text-wrap: balance;
}

.experiment-page .experiment-overview__copy > p:last-child {
  max-width: 720px;
  margin: 13px 0 0;
  color: #405049;
  font-size: 15px;
  line-height: 1.62;
  text-wrap: pretty;
}

.experiment-page .experiment-overview__side {
  display: grid;
  min-width: 0;
  gap: 10px;
}

.experiment-page .constant-strip,
.experiment-page .workspace-readiness {
  overflow: hidden;
  border: 1px solid var(--gl-line);
  border-radius: 8px;
  background: rgba(255,255,255,.86);
  box-shadow: none;
}

.experiment-page .constant-strip > span {
  min-height: 62px;
  padding: 13px 16px 11px;
}

.experiment-page .constant-strip b {
  color: var(--gl-ink);
  font-family: var(--gl-mono);
  font-size: 15px;
  font-weight: 750;
}

.experiment-page .constant-strip small,
.experiment-page .workspace-readiness span {
  color: var(--gl-muted);
  font-family: var(--gl-mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.experiment-page .workspace-readiness article {
  min-height: 44px;
  padding: 9px 16px;
}

.experiment-page .workspace-readiness strong {
  color: var(--gl-green-2);
  font-family: var(--gl-mono);
  font-size: 11px;
  font-weight: 750;
}

.experiment-page .experiment-shell {
  padding-block-start: 12px;
}

.experiment-page .experiment-toolbar {
  position: sticky;
  top: 80px;
  z-index: 80;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 14px;
  padding: 11px;
  border: 1px solid var(--gl-line);
  border-radius: 9px;
  background: rgba(255,255,255,.96);
  box-shadow: 0 10px 28px rgba(20, 38, 29, .06);
  backdrop-filter: blur(16px);
}

.experiment-page .experiment-meta-fields {
  grid-template-columns: minmax(260px, 1.18fr) minmax(160px, .34fr) minmax(240px, .9fr);
  gap: 9px;
}

.experiment-page .experiment-meta-fields label > span {
  margin-bottom: 5px;
  color: var(--gl-muted);
  font-family: var(--gl-mono);
  font-size: 9px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.experiment-page .experiment-meta-fields input {
  height: 44px;
  border-color: var(--gl-line);
  border-radius: 7px;
  background: #fff;
  color: var(--gl-ink);
  font-size: 14px;
}

.experiment-page .experiment-meta-fields input:focus {
  border-color: var(--gl-green);
  outline: 3px solid rgba(36,83,61,.15);
  outline-offset: 1px;
}

.experiment-page .toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.experiment-page .toolbar-actions .button {
  min-height: 44px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 800;
}

.experiment-page .toolbar-actions .button.ghost {
  border-color: var(--gl-line);
  background: #fff;
  color: var(--gl-ink);
}

.experiment-page .toolbar-actions .button.dark {
  border-color: var(--gl-green-2);
  background: var(--gl-green-2);
  color: #fff;
}

.experiment-page .toolbar-actions .button.primary {
  border-color: var(--gl-rust);
  background: var(--gl-rust);
  color: #fff;
}

.experiment-page .toolbar-actions .button:hover {
  transform: translateY(-1px);
  filter: brightness(.98);
}

.experiment-page .workspace-progress {
  min-height: 48px;
  margin-top: 10px;
  padding: 8px 12px;
  border: 1px solid var(--gl-line);
  border-radius: 8px;
  background: rgba(255,255,255,.82);
}

.experiment-page .workspace-progress__copy strong {
  color: var(--gl-ink);
  font-size: 13px;
}

.experiment-page .workspace-progress__copy span {
  color: var(--gl-muted);
  font-size: 11px;
}

.experiment-page .workspace-progress__track {
  height: 6px;
  background: #dfe6e0;
}

.experiment-page .workspace-progress__track span {
  background: var(--gl-green);
}

.experiment-page .experiment-grid {
  grid-template-columns: minmax(0, 1.95fr) minmax(450px, .78fr);
  gap: 14px;
  margin-top: 10px;
}

.experiment-page .data-panel,
.experiment-page .analysis-panel {
  border-color: var(--gl-line);
  border-radius: 10px;
  background: var(--gl-paper);
  box-shadow: 0 12px 34px rgba(20,38,29,.045);
}

.experiment-page .analysis-panel {
  align-self: start;
  position: sticky;
  top: 150px;
  max-height: calc(100svh - 164px);
  overflow: hidden;
}

.experiment-page .panel-heading {
  min-height: 96px;
  padding: 16px 18px 14px;
  border-bottom: 1px solid var(--gl-line);
  background: #fff;
}

.experiment-page .panel-heading h2 {
  margin: 0;
  color: var(--gl-ink);
  font-size: clamp(24px, 1.55vw, 31px);
  font-weight: 760;
  letter-spacing: -.045em;
}

.experiment-page .panel-heading__hint {
  max-width: 760px;
  margin-top: 8px;
  color: var(--gl-muted);
  font-size: 12px;
  line-height: 1.55;
  text-wrap: pretty;
}

.experiment-page .panel-heading__tools {
  gap: 10px;
}

.experiment-page .input-legend {
  gap: 11px;
  color: var(--gl-muted);
  font-family: var(--gl-mono);
  font-size: 8px;
  font-weight: 750;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.experiment-page .sample-counter strong {
  color: var(--gl-ink);
  font-family: var(--gl-mono);
  font-size: 24px;
}

.experiment-page .sample-counter span {
  color: var(--gl-muted);
  font-family: var(--gl-mono);
  font-size: 8px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.experiment-page .matrix-wrap {
  min-height: 560px;
  max-height: min(720px, calc(100svh - 372px));
  scrollbar-color: #9eaca2 transparent;
  scrollbar-width: thin;
}

.experiment-page .experiment-matrix th,
.experiment-page .experiment-matrix td {
  height: 52px;
  padding: 7px 8px;
  border-color: var(--gl-line);
}

.experiment-page .experiment-matrix thead th {
  height: 48px;
  background: #eaf0eb;
}

.experiment-page .experiment-matrix .row-label {
  width: clamp(190px, 14vw, 250px);
  max-width: 250px;
  padding-inline-start: 14px;
  background: #f7f9f7;
}

.experiment-page .experiment-matrix .row-label > span:first-child {
  color: var(--gl-ink);
  font-size: 12px;
  font-weight: 760;
  line-height: 1.25;
}

.experiment-page .experiment-matrix .unit {
  color: var(--gl-muted);
  font-family: var(--gl-mono);
  font-size: 8px;
}

.experiment-page .experiment-matrix .section-row th,
.experiment-page .experiment-matrix .section-row td {
  height: 38px;
  background: var(--gl-green);
}

.experiment-page .experiment-matrix .section-row th {
  font-family: var(--gl-mono);
  font-size: 9px;
  letter-spacing: .13em;
}

.experiment-page .sample-heading b {
  font-size: 11px;
}

.experiment-page .sample-heading small {
  color: var(--gl-green);
  font-size: 8px;
}

.experiment-page .matrix-input {
  height: 39px;
  border-color: #caa73f;
  border-radius: 6px;
  background: var(--gl-input);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.experiment-page .matrix-result {
  color: var(--gl-ink);
  font-family: var(--gl-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.experiment-page .cell-error {
  font-size: 8px;
}

.experiment-page .data-status {
  min-height: 46px;
  padding: 10px 14px;
  border-top: 1px solid var(--gl-line);
  color: var(--gl-muted);
  font-size: 12px;
}

.experiment-page .analysis-panel .panel-heading {
  min-height: 92px;
}

.experiment-page .analysis-heading-actions {
  gap: 8px;
}

.experiment-page .chart-mode-switch {
  border-radius: 7px;
  background: #eef3ef;
}

.experiment-page .chart-mode-switch button {
  min-height: 32px;
  border-radius: 5px;
  font-size: 9px;
}

.experiment-page .analysis-state {
  border-radius: 999px;
  font-family: var(--gl-mono);
  font-size: 8px;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.experiment-page .chart-frame {
  min-height: 360px;
  height: clamp(360px, 39svh, 430px);
  background:
    linear-gradient(rgba(36,83,61,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36,83,61,.045) 1px, transparent 1px),
    #fbfcfa;
  background-size: 38px 38px;
}

.experiment-page .chart-empty strong {
  color: var(--gl-ink);
  font-size: 16px;
}

.experiment-page .chart-empty span {
  color: var(--gl-muted);
  font-size: 12px;
}

.experiment-page .chart-legend {
  min-height: 38px;
  padding: 9px 12px;
  font-family: var(--gl-mono);
  font-size: 8px;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.experiment-page .chart-insights {
  gap: 7px;
  padding: 9px 10px;
}

.experiment-page .chart-insights > span {
  border-radius: 6px;
}

.experiment-page .chart-insights small,
.experiment-page .analysis-results article span,
.experiment-page .equation-box span {
  font-family: var(--gl-mono);
  font-size: 8px;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.experiment-page .chart-insights strong {
  font-size: 12px;
}

.experiment-page .analysis-results article {
  padding: 12px;
}

.experiment-page .analysis-results article strong {
  color: var(--gl-ink);
  font-family: var(--gl-mono);
  font-size: 24px;
  font-variant-numeric: tabular-nums;
}

.experiment-page .equation-box {
  padding: 12px 14px;
}

.experiment-page .equation-box code {
  color: var(--gl-green-2);
  font-family: var(--gl-mono);
  font-size: 11px;
}

.experiment-page .equation-box p {
  color: var(--gl-muted);
  font-size: 10px;
}

.experiment-page .accessible-points summary {
  min-height: 42px;
  padding: 10px 14px;
  font-size: 11px;
}

.experiment-page .notes-panel {
  margin-top: 10px;
  border-radius: 8px;
  background: #fff;
}

.experiment-page .notes-panel summary {
  min-height: 48px;
  padding: 10px 14px;
}

.experiment-page .notes-panel summary span {
  font-family: var(--gl-mono);
  font-size: 10px;
}

.experiment-page .notes-panel summary small {
  font-size: 11px;
}

@media (min-width: 760px) {
  .experiment-page .experiment-overview__copy > p:last-child,
  .experiment-page .panel-heading__hint {
    text-align: justify;
    text-justify: inter-word;
    hyphens: auto;
  }
}

@media (min-width: 1920px) {
  .experiment-page .experiment-wide {
    padding-inline: 28px;
  }

  .experiment-page .experiment-grid {
    grid-template-columns: minmax(0, 2.05fr) minmax(470px, .72fr);
  }
}

@media (max-width: 1420px) {
  .experiment-page .experiment-overview {
    grid-template-columns: minmax(380px, .68fr) minmax(620px, 1.32fr);
    gap: 28px;
  }

  .experiment-page .experiment-grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(410px, .78fr);
  }

  .experiment-page .analysis-panel {
    position: static;
    max-height: none;
  }
}

@media (max-width: 1180px) {
  .experiment-page .experiment-overview {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 20px;
    padding-block: 22px;
  }

  .experiment-page .experiment-overview__copy {
    max-width: 920px;
  }

  .experiment-page .experiment-overview__side {
    grid-template-columns: minmax(0, 1.3fr) minmax(250px, .7fr);
  }

  .experiment-page .experiment-toolbar {
    top: 78px;
    grid-template-columns: 1fr;
  }

  .experiment-page .toolbar-actions {
    justify-content: flex-end;
  }

  .experiment-page .experiment-grid {
    grid-template-columns: 1fr;
  }

  .experiment-page .analysis-panel {
    min-height: 620px;
  }

  .experiment-page .chart-frame {
    height: clamp(390px, 52svh, 480px);
  }
}

@media (max-width: 860px) {
  .experiment-page .experiment-wide {
    padding-inline: 12px;
  }

  .experiment-page .experiment-topbar__nav {
    gap: 18px;
  }

  .experiment-page .experiment-overview__side {
    grid-template-columns: 1fr;
  }

  .experiment-page .experiment-toolbar {
    position: static;
  }

  .experiment-page .experiment-meta-fields {
    grid-template-columns: 1fr 1fr;
  }

  .experiment-page .experiment-meta-fields label:first-child {
    grid-column: 1 / -1;
  }

  .experiment-page .toolbar-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .experiment-page .toolbar-actions .button {
    min-width: 0;
    padding-inline: 9px;
  }

  .experiment-page .workspace-progress {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 620px) {
  .experiment-page .experiment-topbar,
  .experiment-page .experiment-topbar__inner {
    height: 62px;
    min-height: 62px;
  }

  .experiment-page .experiment-brand__mark {
    width: 32px;
    height: 32px;
  }

  .experiment-page .experiment-brand__copy small {
    display: none;
  }

  .experiment-page .experiment-topbar__nav a:first-child {
    display: none;
  }

  .experiment-page .experiment-overview {
    min-height: 0;
    padding-block: 18px;
  }

  .experiment-page .experiment-overview h1 {
    font-size: clamp(38px, 11vw, 48px);
  }

  .experiment-page .experiment-overview__copy > p:last-child {
    font-size: 14px;
  }

  .experiment-page .constant-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .experiment-page .constant-strip > span {
    min-height: 58px;
    padding: 11px 13px;
  }

  .experiment-page .constant-strip > span:last-child {
    grid-column: 1 / -1;
  }

  .experiment-page .experiment-meta-fields {
    grid-template-columns: 1fr;
  }

  .experiment-page .experiment-meta-fields label:first-child {
    grid-column: auto;
  }

  .experiment-page .toolbar-actions {
    grid-template-columns: 1fr 1fr;
  }

  .experiment-page .toolbar-actions .primary {
    grid-column: 1 / -1;
  }

  .experiment-page .panel-heading {
    min-height: auto;
    padding: 14px;
  }

  .experiment-page .panel-heading h2 {
    font-size: 25px;
  }

  .experiment-page .panel-heading__hint {
    font-size: 12px;
  }

  .experiment-page .mobile-sample-nav {
    top: 62px;
  }

  .experiment-page .mobile-field {
    grid-template-columns: minmax(0, 1fr) minmax(132px, 42%);
  }

  .experiment-page .analysis-panel {
    min-height: 0;
  }

  .experiment-page .chart-frame {
    min-height: 340px;
    height: 370px;
  }

  .experiment-page .analysis-results article strong {
    font-size: 22px;
  }

  .experiment-page .notes-panel summary small {
    max-width: calc(100% - 34px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .experiment-page .toolbar-actions .button:hover {
    transform: none;
  }
}

/* v3.8.1 visual QA corrections */
.experiment-page .experiment-brand__mark {
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

@media (min-width: 1421px) {
  .experiment-page .chart-frame {
    min-height: 300px;
    height: 300px;
  }

  .experiment-page .analysis-panel .panel-heading h2 {
    font-size: 28px;
    white-space: nowrap;
  }

  .experiment-page .analysis-heading-actions {
    gap: 5px;
  }

  .experiment-page .chart-mode-switch button {
    padding-inline: 8px;
  }
}

@media (max-width: 620px) {
  .experiment-page .constant-strip {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .experiment-page .constant-strip > span {
    grid-column: span 2;
    min-height: 56px;
  }

  .experiment-page .constant-strip > span:nth-child(4),
  .experiment-page .constant-strip > span:nth-child(5) {
    grid-column: span 3;
  }

  .experiment-page .constant-strip > span:last-child {
    grid-column: span 3;
  }

  .experiment-page .workspace-readiness {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .experiment-page .workspace-readiness article {
    display: grid;
    align-content: center;
    min-height: 64px;
    padding: 9px 10px;
  }

  .experiment-page .workspace-readiness article + article {
    border-top: 0;
    border-inline-start: 1px solid var(--gl-line);
  }

  .experiment-page .workspace-readiness strong {
    margin-top: 5px;
    font-size: 10px;
  }
}