@import url("https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&display=swap");

:root {
  --navy: #101a2c;
  --navy-light: #1b2a40;
  --cream: #f3f1eb;
  --cream-dark: #e8e6de;
  --lime: #c9f06c;
  --gray: #687382;
  --light-gray: #a0a9b2;
  --line: rgba(16, 26, 44, 0.16);

  --body-font: "Manrope", sans-serif;
  --mono-font: "DM Mono", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--navy);
  font-family: var(--body-font);
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3 {
  margin-top: 0;
}

ul {
  margin: 0;
  padding: 0;
}

.site-header,
main,
.site-footer {
  width: min(1180px, calc(100% - 80px));
  margin: 0 auto;
}

/* Header */

.site-header {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 12px;
  font-weight: 700;
}

.site-nav a {
  color: var(--gray);
  transition: color 180ms ease;
}

.site-nav a:hover {
  color: var(--navy);
}

/* Hero */

.hero {
  padding: 80px 0 60px;
}

.eyebrow {
  margin-bottom: 24px;
  color: var(--gray);
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 720px;
  margin-bottom: 26px;
  font-size: clamp(48px, 7vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.08em;
}

.hero h1 em {
  color: var(--gray);
  font-family: Georgia, serif;
  font-weight: 400;
  letter-spacing: -0.08em;
}

.hero-description {
  max-width: 460px;
  margin-bottom: 0;
  color: var(--gray);
  font-size: 15px;
  line-height: 1.7;
}

/* Browse view */

.browse {
  padding: 50px 0 120px;
  border-top: 1px solid var(--line);
}

.kb-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 44px;
}

.search-input {
  width: min(360px, 100%);
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.35);
  color: var(--navy);
  font-family: var(--body-font);
  font-size: 14px;
}

.search-input::placeholder {
  color: var(--light-gray);
}

.search-input:focus {
  outline: 2px solid var(--navy);
  outline-offset: 2px;
}

.filters {
  display: flex;
  gap: 8px;
}

.filter {
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--gray);
  cursor: pointer;
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition:
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.filter:hover {
  border-color: var(--navy);
  color: var(--navy);
}

.filter.is-active {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--cream);
}

/* Article list */

.article-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.article-card {
  min-height: 300px;
  padding: 24px;
  border: 1px solid var(--line);
  background: transparent;
  color: inherit;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  cursor: pointer;
  transition:
    background 180ms ease,
    transform 180ms ease;
}

.article-card:hover {
  background: var(--cream-dark);
  transform: translateY(-4px);
}

.article-category {
  margin-bottom: 40px;
  color: #779d37;
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.article-card h2 {
  margin-bottom: 16px;
  font-size: 23px;
  line-height: 1.1;
  letter-spacing: -0.06em;
}

.article-excerpt {
  color: var(--gray);
  font-size: 13px;
  line-height: 1.65;
}

.article-meta {
  margin-top: auto;
  padding-top: 22px;
  color: var(--light-gray);
  font-family: var(--mono-font);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Article view */

.article-view {
  padding: 50px 0 120px;
  border-top: 1px solid var(--line);
  scroll-behavior: smooth;
}

#contact-support {
  scroll-margin-top: 40px;
}

.back-link {
  margin-bottom: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--gray);
  cursor: pointer;
  font-family: var(--body-font);
  font-size: 13px;
  font-weight: 700;
}

.back-link:hover {
  color: var(--navy);
}

.article-title {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(38px, 5vw, 60px);
  line-height: 1;
  letter-spacing: -0.07em;
}

.article-intro {
  max-width: 620px;
  margin-bottom: 44px;
  color: var(--gray);
  font-size: 17px;
  line-height: 1.65;
}

.article-body {
  max-width: 680px;
}

.article-body h2 {
  margin: 48px 0 18px;
  font-size: 26px;
  letter-spacing: -0.05em;
}

.article-body h3 {
  margin-bottom: 12px;
  font-size: 18px;
  letter-spacing: -0.03em;
}

.article-body p,
.article-body li {
  color: var(--gray);
  font-size: 15px;
  line-height: 1.75;
}

.article-body p {
  margin-bottom: 18px;
}

/* Numbered steps */

.steps {
  display: grid;
  gap: 22px;
  margin: 26px 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding-left: 46px;
}

.steps li::before {
  content: counter(step);
  counter-increment: step;
  position: absolute;
  left: 0;
  top: 2px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: var(--navy);
  color: var(--lime);
  font-family: var(--mono-font);
  font-size: 12px;
}

.steps p {
  margin-bottom: 0;
}

/* Decision tree */

.decision-step {
  margin: 0 0 24px;
}

.branch-question {
  margin-bottom: 12px;
  color: var(--navy);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.branch {
  margin: 0 0 10px;
  padding: 14px 16px;
  border-left: 3px solid var(--line);
}

.branch p:first-child {
  margin-bottom: 10px;
}

.branch ul {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
  padding-left: 20px;
}

.branch-yes {
  border-left-color: #779d37;
  background: rgba(201, 240, 108, 0.14);
}

.branch-no {
  border-left-color: var(--light-gray);
  background: rgba(104, 115, 130, 0.08);
}

.branch-follow {
  margin: 10px 0 0;
  color: var(--navy);
  font-size: 14px;
}

.branch-follow + .branch-follow {
  margin-top: 6px;
}

.decision-body {
  padding-left: 4px;
}

.decision-body p {
  margin-bottom: 10px;
}

.decision-body .branch-follow {
  margin-top: 12px;
}

/* Callouts */

.callout {
  margin: 26px 0;
  padding: 18px 20px;
  border-left: 3px solid var(--navy);
  background: rgba(255, 255, 255, 0.35);
}

.callout p {
  margin-bottom: 0;
  font-size: 14px;
}

.callout-warning {
  border-left-color: #c9862b;
  background: rgba(201, 134, 43, 0.08);
}

.callout strong {
  color: var(--navy);
}

/* Facts bar */

.article-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.article-facts .article-meta {
  margin: 0;
  padding: 7px 11px;
  border: 1px solid var(--line);
  color: var(--gray);
}

/* Tech-notes */

.tech-notes {
  margin: 56px 0 0;
  padding: 22px 24px;
  border: 1px solid var(--line);
  background: var(--cream-dark);
}

.tech-notes-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-family: var(--mono-font);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #779d37;
  text-align: left;
}

.tech-notes-toggle:hover .tech-notes-label {
  color: var(--navy);
}

.tech-notes-label {
  flex: 1;
  text-align: left;
}

.tech-notes-caret {
  font-size: 16px;
  line-height: 1;
  color: var(--gray);
}

.tech-notes-toggle[aria-expanded="false"] + .tech-notes-content {
  display: none;
}

.tech-notes-toggle[aria-expanded="true"] + .tech-notes-content {
  display: block;
}

.tech-notes-content {
  margin-top: 14px;
}

.tech-notes-content > p {
  margin-bottom: 18px;
  color: var(--gray);
  font-size: 13px;
}

.tech-notes ul {
  display: grid;
  gap: 12px;
  padding-left: 20px;
}

.tech-notes li {
  color: var(--gray);
  font-size: 14px;
  line-height: 1.7;
}

.tech-notes code {
  padding: 1px 5px;
  background: rgba(16, 26, 44, 0.06);
  font-family: var(--mono-font);
  font-size: 0.88em;
}

.article-body code {
  padding: 1px 5px;
  background: rgba(16, 26, 44, 0.06);
  border-radius: 3px;
  font-family: var(--mono-font);
  font-size: 0.9em;
}

/* Related */

.article-related {
  margin-top: 56px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.article-related h2 {
  margin-bottom: 16px;
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray);
}

.related-link {
  display: inline-block;
  margin: 0 14px 10px 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  border-bottom: 1px solid var(--navy);
}

/* Escalation panel */

.escalation {
  margin: 48px 0 0;
  padding: 22px 26px;
  border: 1px solid var(--navy);
  background: rgba(16, 26, 44, 0.04);
}

.escalation h2 {
  margin-bottom: 10px;
  font-size: 20px;
  letter-spacing: -0.03em;
}

.escalation-intro {
  margin-bottom: 16px;
  color: var(--gray);
  font-size: 14px;
  line-height: 1.7;
}

.escalation ul {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
  padding-left: 20px;
}

.escalation ul li {
  font-size: 14px;
}

.escalation-next {
  margin-bottom: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--gray);
  font-size: 13px;
}

.escalation-next strong {
  color: var(--navy);
}

/* Links inside article body text */

.article-body a {
  color: #557d1f;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.article-body a:hover {
  color: var(--navy);
}

.related-link:hover {
  color: #779d37;
  border-color: #779d37;
}

/* Footer */

.site-footer {
  display: flex;
  justify-content: space-between;
  padding: 28px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--gray);
  font-family: var(--mono-font);
  font-size: 10px;
}

/* Back to top */

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 20;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--cream);
  cursor: pointer;
  font-family: var(--body-font);
  font-size: 20px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition:
    opacity 180ms ease,
    visibility 180ms ease,
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.back-to-top:hover {
  background: var(--lime);
  color: var(--navy);
  transform: translateY(-2px);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Mobile layout */

@media (max-width: 700px) {
  .site-header,
  main,
  .site-footer {
    width: calc(100% - 40px);
  }

  .site-header {
    min-height: 74px;
  }

  .hero {
    padding: 60px 0 46px;
  }

  .hero h1 {
    font-size: 44px;
  }

  .kb-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .search-input {
    width: 100%;
  }

  .filters {
    flex-wrap: wrap;
  }

  .article-list {
    grid-template-columns: 1fr;
  }

  .article-card {
    min-height: 0;
  }

  .article-title {
    font-size: 34px;
  }
}

.empty {
  grid-column: 1 / -1;
  padding: 40px 0;
  color: var(--gray);
  font-size: 14px;
}