:root {
  --paper: #ffffff;
  --page: #f7f9fc;
  --ink: #1d2751;
  --muted: #626d87;
  --cobalt: #315fc1;
  --line: #dde5f1;
  --wash: #eff4fd;
  --error: #9b344b;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--page);
  font-synthesis: none;
  scroll-behavior: smooth;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
button,
textarea {
  font: inherit;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
:focus-visible {
  outline: 3px solid var(--cobalt);
  outline-offset: 4px;
}
.skip-link {
  position: fixed;
  left: 20px;
  top: -80px;
  z-index: 3;
  background: white;
  padding: 15px;
}
.skip-link:focus {
  top: 12px;
}
.page {
  max-width: 1264px;
  margin: auto;
  padding: 0 48px;
}
.masthead {
  min-height: 106px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 19px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.5px;
}
.wordmark svg {
  color: var(--cobalt);
  flex-shrink: 0;
}
.wordmark-light {
  font-weight: 400;
}
nav {
  display: flex;
  gap: 25px;
  font-size: 13px;
}
nav a {
  text-decoration: none;
}
nav a:hover {
  color: var(--cobalt);
  text-decoration: underline;
}
.intro {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 49px 0 43px;
}
h1,
h2,
h3,
.wordmark {
  font-family: 'Trebuchet MS', 'Segoe UI', sans-serif;
}
h1 {
  margin: 0;
  font-size: clamp(35px, 4.3vw, 58px);
  line-height: 1.08;
  letter-spacing: -2.4px;
  font-weight: 600;
}
.intro-copy {
  padding: 7px 0 0;
  max-width: 410px;
}
.intro-copy p {
  margin: 0;
  font-size: 19px;
  line-height: 1.55;
}
.intro-copy .scope-note {
  font-size: 13px;
  margin-top: 17px;
  color: var(--muted);
  line-height: 1.5;
}
.bench {
  border: 1px solid #cad7eb;
  border-radius: 12px;
  background: var(--paper);
  overflow: hidden;
  scroll-margin-top: 20px;
  box-shadow: 0 12px 30px #1d275106;
}
.bench-toolbar {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 68px;
  padding: 15px 25px;
  border-bottom: 1px solid var(--line);
}
.toolbar-label {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}
.examples {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.example-button {
  padding: 9px 14px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  font-size: 13px;
}
.example-button[aria-pressed='true'] {
  background: var(--ink);
  color: white;
}
.example-button:hover:not([aria-pressed='true']) {
  background: var(--wash);
}
.workbench {
  display: grid;
  grid-template-columns: 1fr 1.12fr;
  min-height: 338px;
}
.source-pane {
  padding: 24px 25px 20px;
  display: flex;
  flex-direction: column;
}
.pane-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  font-weight: 600;
}
.pane-heading > :last-child {
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
}
.editor-shell {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-top: 30px;
}
.fence {
  font:
    13px/1.5 'DejaVu Sans Mono',
    Consolas,
    monospace;
  color: #8792aa;
}
textarea {
  display: block;
  width: 100%;
  flex: 1;
  min-height: 126px;
  margin: 7px 0;
  padding: 0;
  border: 0;
  resize: vertical;
  background: transparent;
  color: var(--cobalt);
  font:
    14px/1.9 'DejaVu Sans Mono',
    Consolas,
    monospace;
  overflow-wrap: anywhere;
  border-radius: 2px;
}
textarea:focus-visible {
  outline: 2px solid #b9ccef;
  outline-offset: 5px;
}
#editor-hint {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}
.preview-pane {
  background: var(--wash);
  padding: 24px 25px 19px;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}
.drawing {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 232px;
  color: var(--ink);
  overflow: hidden;
}
.drawing .chemfig-display {
  width: 100%;
  margin: 7px 0;
  overflow: visible;
}
.drawing .chemfig-svg {
  max-height: 260px;
  max-width: 100%;
  width: auto;
}
#structure-note {
  margin: 0;
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}
.bench-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding: 14px 24px;
  min-height: 62px;
}
#status {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}
#status[data-error='true'] {
  color: var(--error);
}
#download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0 7px 12px;
  background: transparent;
  color: var(--cobalt);
  border: 0;
  font-size: 12px;
  white-space: nowrap;
  font-weight: 600;
}
#download:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.drawing .chemfig-error {
  width: 100%;
  border: 0;
  color: var(--error);
  line-height: 1.6;
  font-size: 13px;
}
.drawing .chemfig-error code {
  display: block;
  font-size: 11px;
}
.noscript {
  padding: 0 25px;
  font-size: 13px;
}
h2 {
  font-size: 29px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.8px;
  margin: 0 0 15px;
}
.inline-section {
  display: grid;
  grid-template-columns: 1fr 1.12fr;
  gap: 46px;
  align-items: center;
  margin: 49px 0 75px;
  padding-left: 4px;
}
.inline-section h2 {
  font-size: 24px;
  margin-bottom: 10px;
}
.inline-section p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}
.inline-specimen {
  padding: 5px 0 0;
}
.inline-specimen p {
  color: var(--ink);
  line-height: 2;
}
.inline-specimen .chemfig-svg {
  width: 155px;
}
.inline-specimen > code {
  font:
    11px/1.5 'DejaVu Sans Mono',
    Consolas,
    monospace;
  color: var(--muted);
}
.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 25px;
}
.section-heading h2 {
  margin: 0;
}
.section-heading p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}
.specimens {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.specimen {
  padding-top: 20px;
  border-top: 2px solid var(--line);
  min-width: 0;
}
.specimen h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.2px;
}
.specimen-drawing {
  height: 175px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.specimen-drawing .chemfig-display {
  margin: 0;
  width: 100%;
}
.specimen-drawing .chemfig-svg {
  max-height: 155px;
  max-width: 95%;
}
.specimen p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
  margin: 0 0 15px;
}
.specimen > code {
  display: block;
  color: var(--cobalt);
  font:
    10px/1.8 'DejaVu Sans Mono',
    Consolas,
    monospace;
  overflow-wrap: anywhere;
}
.integration-section {
  margin: 80px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 20px;
}
.integration-section p,
.scope-section p {
  max-width: 60ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  margin: 0 0 16px;
}
.integration-section p code {
  color: var(--ink);
  font-size: 12px;
}
.integration-code {
  background: #eaf0fb;
  border-radius: 9px;
  margin: 0;
  padding: 28px;
  color: var(--ink);
  overflow-x: auto;
  font:
    12px/1.9 'DejaVu Sans Mono',
    Consolas,
    monospace;
}
.text-link {
  color: var(--cobalt);
  font-size: 13px;
  font-weight: 600;
}
.scope-section {
  border-top: 1px solid var(--line);
  padding: 40px 0 53px;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 50px;
  scroll-margin-top: 20px;
}
.site-footer {
  padding: 27px 0 35px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}
.version {
  margin-left: 6px;
  color: var(--cobalt);
}
.site-footer a {
  text-decoration: none;
}
.site-footer a:hover {
  text-decoration: underline;
}
@media (min-width: 1400px) {
  .intro {
    padding-top: 65px;
  }
}
@media (max-width: 900px) {
  .page {
    padding: 0 28px;
  }
  .masthead {
    min-height: 88px;
  }
  .wordmark {
    font-size: 16px;
  }
  nav {
    gap: 17px;
    font-size: 12px;
  }
  nav a:first-child {
    display: none;
  }
  .intro {
    gap: 35px;
    padding-top: 33px;
  }
  h1 {
    letter-spacing: -1.6px;
  }
  .intro-copy p {
    font-size: 16px;
  }
  .bench-toolbar {
    gap: 12px;
    padding: 14px 18px;
  }
  .example-button {
    padding: 9px 10px;
    font-size: 12px;
  }
  .source-pane,
  .preview-pane {
    padding-left: 18px;
    padding-right: 18px;
  }
  textarea {
    font-size: 12px;
  }
  .specimens {
    gap: 22px;
  }
  .section-heading {
    display: block;
  }
  .section-heading p {
    margin-top: 10px;
  }
  .integration-section {
    gap: 35px;
  }
}
@media (max-width: 620px) {
  .page {
    padding: 0 20px;
  }
  .masthead {
    min-height: 84px;
    gap: 15px;
    flex-wrap: wrap;
    padding: 20px 0;
  }
  .wordmark {
    font-size: 17px;
  }
  .wordmark svg {
    width: 25px;
    height: 28px;
  }
  nav {
    width: 100%;
    justify-content: space-between;
    padding-left: 37px;
    font-size: 11px;
  }
  nav a:first-child {
    display: inline;
  }
  .intro {
    display: block;
    padding: 30px 0;
  }
  h1 {
    font-size: 40px;
    letter-spacing: -1.8px;
  }
  .intro-copy {
    padding-top: 22px;
    max-width: 37ch;
  }
  .intro-copy p {
    font-size: 16px;
  }
  .intro-copy .scope-note {
    margin-top: 12px;
    font-size: 11px;
  }
  .bench-toolbar {
    display: block;
    padding: 16px 13px 12px;
  }
  .toolbar-label {
    display: block;
    margin: 0 7px 9px;
    font-size: 11px;
  }
  .examples {
    gap: 2px;
  }
  .example-button {
    padding: 8px 9px;
    font-size: 11px;
  }
  .workbench {
    grid-template-columns: 1fr;
  }
  .source-pane {
    padding: 20px;
  }
  .editor-shell {
    padding-top: 20px;
  }
  textarea {
    min-height: 78px;
    font-size: 12px;
  }
  #editor-hint {
    margin-top: 16px;
    font-size: 10px;
  }
  .preview-pane {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 20px;
  }
  .drawing {
    min-height: 240px;
  }
  .drawing .chemfig-svg {
    max-height: 235px;
  }
  .bench-footer {
    padding: 13px 17px;
    gap: 12px;
  }
  #status {
    font-size: 10px;
  }
  #download {
    font-size: 11px;
  }
  .inline-section {
    display: block;
    margin: 37px 0 55px;
  }
  .inline-specimen {
    margin-top: 20px;
  }
  .inline-specimen .chemfig-svg {
    width: 135px;
  }
  h2 {
    font-size: 27px;
  }
  .specimens {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .specimen-drawing {
    height: 180px;
  }
  .specimen > code {
    font-size: 11px;
  }
  .integration-section {
    grid-template-columns: 1fr;
    margin-top: 45px;
    gap: 24px;
    padding: 32px 0;
  }
  .integration-code {
    font-size: 11px;
    padding: 22px;
  }
  .scope-section {
    display: block;
    padding: 32px 0;
  }
  .scope-section h2 {
    margin-bottom: 20px;
  }
  .site-footer {
    display: block;
    padding: 24px 0 30px;
  }
  .site-footer > * {
    display: block;
    margin-bottom: 7px;
  }
}
@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }
}