:root {
  --content: #FFFFFF;
  --sidebar: #E7F2F8;
  --ink: #0F172A;
  --link: #0369A1;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--content);
  color: var(--ink);
  font-family: "Source Sans 3", sans-serif;
  font-size: 18px;
  line-height: 1.45;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover,
a:focus-visible {
  color: var(--ink);
}

.topbar {
  border-bottom: 1px solid var(--ink);
  background: var(--content);
}

.topbar__inner {
  min-height: 54px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.brand {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.docs-label,
.section-marker,
.toc__label,
.field-label,
.form-field label,
.contact-list dt {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.07em;
  line-height: 1.3;
}

.docs-label {
  color: var(--link);
}

.phone {
  justify-self: end;
  font-weight: 600;
}

.docs-shell {
  max-width: 1440px;
  min-height: calc(100vh - 54px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(240px, 27%) minmax(0, 1fr);
}

.toc {
  background: var(--sidebar);
  border-right: 1px solid var(--ink);
}

.toc__sticky {
  position: sticky;
  top: 24px;
  padding: 40px 32px;
}

.toc__label {
  color: var(--link);
  margin-bottom: 18px;
}

.toc__nav {
  display: grid;
  border-top: 1px solid var(--ink);
}

.toc__nav a {
  padding: 13px 0;
  border-bottom: 1px solid var(--ink);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.toc__nav a:hover,
.toc__nav a:focus-visible {
  color: var(--link);
  padding-left: 8px;
}

.toc__note {
  margin: 24px 0 0;
  font-size: 16px;
}

.content {
  width: min(100%, 900px);
  padding: 72px 64px 48px;
}

.request,
.contact,
.footer {
  scroll-margin-top: 24px;
}

.section-marker {
  color: var(--link);
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin: 12px 0 14px;
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.03;
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 10px;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.intro {
  max-width: 520px;
  margin-bottom: 36px;
  font-size: 22px;
}

.work-records {
  border-top: 1px solid var(--ink);
}

.work-record {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 8px 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--ink);
}

.work-record p,
.work-record strong {
  margin: 0;
}

.work-record strong {
  color: var(--link);
  font-size: 22px;
  line-height: 1.15;
}

.work-record .field-label {
  color: var(--link);
}

.work-record .field-label:nth-of-type(2) {
  grid-column: 1;
}

.work-record strong,
.work-record .field-label:nth-of-type(2) + p {
  grid-column: 2;
}

.work-record--note p:nth-child(2),
.work-record--note p:nth-child(4) {
  grid-column: 2;
}

.request-form {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 3px solid var(--ink);
}

.form-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: baseline;
  margin-bottom: 28px;
}

.form-heading p {
  margin: 0;
  text-align: right;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-field {
  margin-bottom: 20px;
}

.form-field label {
  display: block;
  margin-bottom: 8px;
  color: var(--link);
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--ink);
  border-radius: 0;
  outline: none;
  background: var(--content);
  color: var(--ink);
  font: inherit;
  padding: 12px 14px;
}

input:focus,
textarea:focus {
  border: 3px solid var(--link);
  padding: 10px 12px;
}

textarea {
  min-height: 116px;
  resize: vertical;
}

::placeholder {
  color: var(--ink);
  opacity: 1;
}

.form-note {
  margin: 4px 0 20px;
  font-size: 16px;
}

button {
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--ink);
  color: var(--content);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 13px 20px;
}

button:hover,
button:focus-visible {
  background: var(--link);
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.form-status {
  min-height: 27px;
  margin: 14px 0 0;
  color: var(--link);
  font-weight: 600;
}

.contact {
  margin-top: 80px;
  padding: 32px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.8fr);
  gap: 40px;
}

.contact-list {
  margin: 0;
}

.contact-list > div {
  padding: 11px 0;
  border-top: 1px solid var(--ink);
}

.contact-list > div:last-child {
  border-bottom: 1px solid var(--ink);
}

.contact-list dt {
  margin-bottom: 5px;
  color: var(--link);
}

.contact-list dd {
  margin: 0;
}

.footer {
  padding: 32px 0 0;
  font-size: 16px;
}

.footer h2 {
  margin-top: 9px;
  font-size: 22px;
}

.footer p {
  margin-bottom: 6px;
}

@media (max-width: 760px) {
  .topbar__inner {
    min-height: auto;
    padding: 14px 20px;
    grid-template-columns: 1fr auto;
    gap: 4px 16px;
  }

  .docs-label {
    grid-column: 1;
    grid-row: 2;
  }

  .phone {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .docs-shell {
    display: block;
  }

  .toc {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .toc__sticky {
    position: static;
    padding: 16px 20px;
  }

  .toc__label,
  .toc__note {
    display: none;
  }

  .toc__nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    border: 0;
    padding-bottom: 2px;
  }

  .toc__nav a {
    flex: 0 0 auto;
    border: 1px solid var(--ink);
    padding: 6px 10px;
    font-size: 15px;
  }

  .toc__nav a:hover,
  .toc__nav a:focus-visible {
    padding-left: 10px;
  }

  .content {
    width: 100%;
    padding: 42px 20px 32px;
  }

  .work-record,
  .contact {
    grid-template-columns: 1fr;
  }

  .work-record {
    gap: 7px;
  }

  .work-record .field-label,
  .work-record strong,
  .work-record .field-label:nth-of-type(2),
  .work-record--note p:nth-child(2),
  .work-record--note p:nth-child(4) {
    grid-column: 1;
  }

  .field-grid,
  .contact {
    grid-template-columns: 1fr;
  }

  .contact {
    gap: 24px;
    margin-top: 56px;
  }

  .form-heading {
    display: block;
  }

  .form-heading p {
    margin-top: 8px;
    text-align: left;
  }
}

@media (max-width: 390px) {
  body {
    font-size: 17px;
  }

  .phone {
    font-size: 15px;
  }
}