:root {
  --tool-blue: #163f63;
  --tool-blue-dark: #0f2f4a;
  --tool-teal: #2d718f;
  --tool-focus: #b76f00;
  --tool-panel: #ffffff;
  --tool-shadow: 0 18px 50px rgba(23, 37, 51, 0.09);
}

.tool-header {
  min-height: 4.75rem;
}

.tool-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.tool-nav a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding: 0.5rem 0.8rem;
  color: var(--color-muted);
  border-radius: 0.3rem;
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}

.tool-nav a:hover {
  color: var(--tool-blue);
  background: var(--color-soft);
}

.gnuplot-main {
  width: min(100% - 3rem, 1180px);
}

.eyebrow {
  margin: 0 0 0.55rem;
  color: var(--tool-teal);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.tool-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.tool-heading > div {
  min-width: 0;
  flex: 1 1 auto;
}

.tool-heading h1 {
  width: min(100%, 650px);
}

.privacy-note {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.6rem;
  color: #3d6154;
  font-size: 0.83rem;
  font-weight: 650;
}

.privacy-note span {
  color: #2f8a65;
  font-size: 0.7rem;
}

.gnuplot-workspace {
  display: grid;
  grid-template-columns: minmax(330px, 0.9fr) minmax(0, 1.1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
  align-items: start;
}

.tool-panel {
  min-width: 0;
  padding: clamp(1.15rem, 2.2vw, 1.6rem);
  border: 1px solid var(--color-line);
  border-radius: 0.55rem;
  background: var(--tool-panel);
  box-shadow: var(--tool-shadow);
}

.result-panel {
  position: sticky;
  top: 1rem;
}

.panel-heading {
  display: flex;
  min-height: 2.25rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.panel-heading h2 {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 1.05rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.control-wide {
  grid-column: 1 / -1;
}

.control-field {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.4rem;
  color: #344555;
  font-size: 0.78rem;
  font-weight: 700;
}

.control-field[hidden] {
  display: none;
}

.control-field code,
.gnuplot-help code {
  color: var(--tool-blue);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.control-field select,
.control-field input[type="text"],
.control-field input[type="number"] {
  width: 100%;
  min-height: 2.7rem;
  padding: 0.48rem 0.65rem;
  color: var(--color-ink);
  border: 1px solid #c3cdd5;
  border-radius: 0.3rem;
  background: #fff;
  font: inherit;
  font-weight: 500;
}

.control-field small {
  color: var(--color-muted);
  font-size: 0.7rem;
  font-weight: 500;
  line-height: 1.45;
}

.colour-field,
.option-fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.colour-field legend,
.option-fieldset legend {
  margin-bottom: 0.4rem;
  padding: 0;
}

.colour-inputs {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  gap: 0.5rem;
}

.colour-inputs input[type="color"] {
  width: 3.2rem;
  min-height: 2.7rem;
  padding: 0.2rem;
  border: 1px solid #c3cdd5;
  border-radius: 0.3rem;
  background: #fff;
  cursor: pointer;
}

.colour-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.45rem;
}

.colour-preset {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 1px #aab8c1;
  cursor: pointer;
}

.colour-preset[aria-pressed="true"] {
  box-shadow: 0 0 0 3px var(--tool-blue);
}

.range-control {
  display: flex;
  min-height: 2.7rem;
  align-items: center;
  gap: 0.65rem;
}

.range-control input {
  min-width: 0;
  flex: 1;
  accent-color: var(--tool-blue);
}

.range-control output {
  min-width: 2.2rem;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.dash-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.45rem;
}

.dash-option,
.point-option {
  min-width: 0;
  padding: 0.45rem;
  color: #435463;
  border: 1px solid #cbd5dc;
  border-radius: 0.3rem;
  background: #fff;
  font: inherit;
  font-size: 0.7rem;
  font-weight: 650;
  cursor: pointer;
}

.dash-option:hover,
.point-option:hover {
  border-color: #718b9c;
  background: #f7f9fa;
}

.dash-option[aria-pressed="true"],
.point-option[aria-pressed="true"] {
  color: var(--tool-blue);
  border-color: var(--tool-blue);
  background: #eaf1f5;
  box-shadow: inset 0 0 0 1px var(--tool-blue);
}

.dash-option svg {
  display: block;
  width: 100%;
  height: 1.2rem;
  margin-bottom: 0.15rem;
}

.point-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.4rem;
}

.point-option {
  padding: 0.3rem 0.15rem;
}

.point-option svg {
  display: block;
  width: 100%;
  height: 1.65rem;
  margin-bottom: 0.05rem;
}

.plot-preview {
  padding: 0.75rem;
  border: 1px solid #d5dde2;
  border-radius: 0.4rem;
  background: #fbfcfd;
}

.plot-preview svg {
  display: block;
  width: 100%;
  height: auto;
}

.command-label {
  display: block;
  margin: 1.25rem 0 0.4rem;
  color: #344555;
  font-size: 0.78rem;
  font-weight: 700;
}

#command-output {
  width: 100%;
  min-height: 13rem;
  padding: 1rem;
  resize: vertical;
  color: #e8eef2;
  border: 1px solid #142d40;
  border-radius: 0.35rem;
  background: #172533;
  font: 0.79rem/1.65 "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  tab-size: 2;
}

.command-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.7rem;
}

.tool-status {
  color: #2f7157;
  font-size: 0.75rem;
}

.tool-status[data-state="error"] {
  color: #9a3b35;
}

.button {
  display: inline-flex;
  min-height: 2.7rem;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 0.9rem;
  border: 1px solid transparent;
  border-radius: 0.32rem;
  font: inherit;
  font-size: 0.83rem;
  font-weight: 700;
  cursor: pointer;
}

.button-primary {
  color: #fff;
  border-color: var(--tool-blue);
  background: var(--tool-blue);
}

.button-primary:hover {
  border-color: var(--tool-blue-dark);
  background: var(--tool-blue-dark);
}

.button-quiet {
  color: var(--tool-blue);
  border-color: #c5d0d7;
  background: #fff;
}

.button-quiet:hover {
  background: var(--color-soft);
}

.error-message {
  margin: 0.8rem 0 0;
  color: #9a3b35;
  font-size: 0.78rem;
}

.control-field input:focus-visible,
.control-field select:focus-visible,
.button:focus-visible,
.colour-preset:focus-visible,
.dash-option:focus-visible,
.point-option:focus-visible,
#command-output:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--tool-focus);
  outline-offset: 2px;
  border-color: var(--tool-focus);
}

.gnuplot-help {
  margin-top: 3.75rem;
}

.reference-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.9rem;
}

.reference-grid article {
  padding: 1rem;
  border: 1px solid var(--color-line);
  border-radius: 0.4rem;
  background: #fff;
}

.reference-grid h3 {
  margin: 0 0 0.55rem;
  padding: 0;
  border: 0;
  font-size: 0.95rem;
}

.reference-grid p,
.terminal-note p,
.source-note {
  margin: 0;
  color: #4d5e6d;
  font-size: 0.78rem;
  line-height: 1.65;
}

.terminal-note {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--tool-teal);
  background: #f2f7f9;
}

.source-note {
  max-width: none;
  margin-top: 1rem;
}

.tool-footer {
  display: flex;
  width: min(100% - 3rem, var(--header-width));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
  font-size: 0.78rem;
}

.tool-footer > a {
  font-weight: 700;
}

@media (max-width: 900px) {
  .gnuplot-workspace {
    grid-template-columns: 1fr;
  }

  .result-panel {
    position: static;
  }

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

@media (max-width: 800px) {
  .tool-header {
    display: flex;
    padding: 0.8rem 1.25rem;
  }

  .tool-header .site-name {
    margin: 0;
  }

  .tool-nav {
    margin-top: 0;
  }
}

@media (max-width: 680px) {
  .gnuplot-main {
    width: min(100% - 2rem, 1180px);
  }

  .tool-heading {
    display: block;
  }

  .privacy-note {
    margin: -0.8rem 0 1.5rem;
  }

  .control-field select,
  .control-field input[type="text"],
  .control-field input[type="number"],
  #command-output {
    font-size: 1rem;
  }

  .settings-grid,
  .reference-grid {
    grid-template-columns: 1fr;
  }

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

  .point-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .tool-footer {
    width: min(100% - 2rem, var(--header-width));
    flex-direction: column;
  }
}

@media (max-width: 430px) {
  .header-inner {
    width: min(100% - 2rem, var(--header-width));
    gap: 0.5rem;
  }

  .tool-nav a {
    padding-inline: 0.45rem;
    font-size: 0.78rem;
  }

  .site-name span {
    display: none;
  }

  .point-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (pointer: coarse) {
  .colour-preset {
    width: 2.75rem;
    height: 2.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}