/* 02. Shared navigation, buttons, editorial cards and registration form. */
.site-header { position: sticky; top: 0; z-index: 30; height: 86px; background: rgba(255,255,255,.97); border-bottom: 1px solid transparent; transition: box-shadow .25s, border-color .25s; }
.site-header.is-scrolled { border-color: var(--line); box-shadow: 0 5px 24px #172c4910; }
.header-inner { height: 100%; display: flex; align-items: center; gap: 30px; }
.brand { display: flex; align-items: center; flex-shrink: 0; background: transparent; border-radius: 4px; padding: 11px 12px; }
.brand img { width: 180px; height: 31px; object-fit: contain; }
.main-nav { margin-left: auto; display: flex; align-items: center; gap: 24px; }
.main-nav a { font-size: .875rem; position: relative; white-space: nowrap; }
.main-nav a::after { content: ''; position: absolute; height: 2px; inset: auto 0 -8px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .25s; }
.main-nav a:hover::after, .main-nav a[aria-current]::after { transform: scaleX(1); }
.main-nav a[aria-current] { color: var(--blue); }
.header-actions { display: flex; align-items: center; gap: 22px; }
.languages { display: flex; gap: 12px; font-size: .8125rem; align-items: center; }
.languages a { min-height: 44px; display: inline-flex; align-items: center; color: var(--muted); }
.languages a[aria-current] { font-weight: 800; color: var(--blue); }
.languages span { height: 12px; border-left: 1px solid var(--line); }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 52px; padding: 13px 30px; border-radius: 999px; border: 1px solid var(--blue); background: var(--blue); color: #fff; font-size: .9375rem; font-weight: 700; line-height: 1.5; text-align: center; transition: background .25s, transform .25s var(--ease), box-shadow .25s; }
.button:hover { background: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 6px 20px #0755ed24; }
.button--outline { color: var(--blue); background: transparent; }
.button--outline:hover { color: #fff; }
.button--white { background: #fff; border-color: #fff; color: var(--blue); }
.button--white:hover { background: #e7f1ff; }
.button--small { min-height: 44px; padding: 10px 24px; font-size: .875rem; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: #fff; border-radius: 50%; position: relative; }
.menu-toggle span { position: absolute; left: 12px; right: 12px; height: 2px; top: 16px; background: var(--ink); transition: transform .25s, top .25s; }
.menu-toggle span+span { top: 24px; }
.menu-toggle[aria-expanded=true] span { top: 20px; transform: rotate(45deg); }
.menu-toggle[aria-expanded=true] span+span { transform: rotate(-45deg); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 36px; }
.section-heading .eyebrow { margin-bottom: 8px; }
.article-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 28px; }
.article-card { min-width: 0; }
.article-card__image { overflow: hidden; aspect-ratio: 1.65; background: var(--sky); border-radius: 5px; }
.article-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.article-card a:hover img { transform: scale(1.045); }
.article-card__meta { display: flex; align-items: center; gap: 16px; margin: 20px 0 11px; color: var(--muted); font-size: .75rem; letter-spacing: .035em; }
.tag { color: var(--blue); font-weight: 700; text-transform: uppercase; }
.article-card h3 { font-size: 1.23rem; letter-spacing: -.025em; line-height: 1.65; }
.article-card a:hover h3 { color: var(--blue); }
.article-card p { color: var(--muted); margin-top: 10px; font-size: .875rem; }
.editorial-frame { position: relative; overflow: hidden; }
.editorial-frame img { position: absolute; width: 300%; max-width: none; height: auto; object-fit: initial; top: 0; left: -100%; }
.editorial-frame--learn img { left: -200%; }
.image-caption { display: flex; justify-content: space-between; gap: 20px; font-size: .75rem; color: var(--muted); padding-top: 15px; letter-spacing: .05em; }
.signup { background: var(--blue); color: #fff; padding-block: 76px; }
.signup__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center; }
.signup .eyebrow { color: #d3e5ff; }
.signup h2 { font-size: clamp(2rem, 3.5vw, 3.15rem); line-height: 1.4; }
.signup__intro { max-width: 430px; margin-top: 20px; color: #ecf4ff; font-size: .9375rem; }
.signup-form { position: relative; }
.field-label { display: block; font-size: .875rem; font-weight: 700; margin-bottom: 10px; }
.email-row { display: flex; gap: 10px; }
.email-input { width: 100%; height: 58px; border: 1px solid #fff; background: #fff; color: var(--ink); padding: 14px 20px; border-radius: 5px; font-size: 1rem; }
.email-input::placeholder { color: #6a7787; }
.email-row .button { border-radius: 5px; padding-inline: 24px; flex-shrink: 0; color: #fff; background: #102548; border-color: #102548; }
.email-row .button:hover { background: #071529; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: .8125rem; margin: 20px 0 8px; line-height: 1.9; cursor: pointer; }
.consent input { width: 18px; height: 18px; margin: 4px 0 0; accent-color: #102548; flex-shrink: 0; }
.consent a { text-decoration: underline; }
.signup-note { font-size: .75rem; color: #e8f2ff; }
.form-status { min-height: 1.8em; font-size: .875rem; margin-top: 14px; }
.form-status.is-error { padding: 12px 16px; background: #fff; color: #a42929; border-radius: 4px; }
.form-retry { padding: 5px 0; background: transparent; border: 0; color: inherit; text-decoration: underline; min-height: 44px; }
.signup-success { background: #fff; color: var(--ink); padding: 32px; border-radius: 5px; }
.signup-success h3 { color: var(--blue); font-size: 1.5rem; margin-bottom: 12px; }
.honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.site-footer { padding: 64px 0 26px; background: #0e1a2a; color: #fff; }
.footer-top { display: flex; justify-content: space-between; gap: 48px; padding-bottom: 48px; }
.footer-brand img { width: 210px; height: 38px; object-fit: contain; }
.footer-brand p { color: #aebdd0; font-size: .8125rem; margin-top: 22px; }
.footer-nav { display: flex; gap: 32px; align-items: flex-start; flex-wrap: wrap; font-size: .875rem; }
.footer-nav a:hover, .footer-bottom a:hover { text-decoration: underline; }
.footer-bottom { border-top: 1px solid #ffffff24; padding-top: 24px; display: flex; justify-content: space-between; gap: 24px; font-size: .75rem; color: #b8c5d5; }
.footer-legal { display: flex; gap: 24px; flex-wrap: wrap; }
.breadcrumb { margin-bottom: 45px; display: flex; flex-wrap: wrap; gap: 12px; font-size: .8125rem; color: var(--muted); }
.breadcrumb a:hover { color: var(--blue); text-decoration: underline; }
.faq { margin-top: 32px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding: 25px 45px 25px 0; cursor: pointer; list-style: none; position: relative; font-weight: 700; font-size: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 8px; top: 22px; color: var(--blue); font-size: 1.5rem; font-weight: 400; }
.faq details[open] summary::after { content: '−'; }
.faq details p { padding: 0 36px 28px 0; color: var(--muted); }
@media (max-width: 1150px) {
  .header-inner { gap: 20px; }
  .main-nav { gap: 18px; }
  .brand img { width: 145px; }
  .header-actions { gap: 16px; }
  .header-actions>.button { display: none; }
  .signup__grid { gap: 50px; }
}
@media (max-width: 800px) {
  .site-header { height: 74px; }
  .header-inner { justify-content: space-between; }
  .header-actions { margin-left: auto; }
  .brand { padding: 8px 10px; }
  .brand img { width: 143px; height: 27px; }
  .menu-toggle { display: block; }
  .main-nav { display: none; position: absolute; top: 74px; left: 0; right: 0; max-height: calc(100dvh - 74px); overflow-y: auto; margin: 0; padding: 32px 24px 44px; background: #fff; box-shadow: 0 14px 18px #071e4115; }
  .main-nav.is-open { display: flex; flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav a { padding: 14px 0; font-size: 1.2rem; }
  .main-nav a::after { bottom: 5px; }
  .article-grid { gap: 20px; }
  .article-card h3 { font-size: 1.08rem; }
  .signup__grid { grid-template-columns: 1fr; gap: 38px; }
  .signup__intro { max-width: 540px; }
  .footer-top { flex-direction: column; gap: 32px; }
  .footer-nav { gap: 18px 28px; }
  .footer-bottom { flex-direction: column; gap: 14px; }
}
@media (max-width: 600px) {
  .header-inner { width: calc(100% - 32px); gap: 8px; }
  .header-actions { gap: 10px; }
  .languages { gap: 9px; }
  .section-heading { align-items: flex-start; gap: 16px; flex-wrap: wrap; }
  .section-heading .button { min-height: 44px; padding: 10px 20px; font-size: .8125rem; }
  .article-grid { grid-template-columns: 1fr; gap: 32px; }
  .article-card__image { aspect-ratio: 1.75; }
  .article-card h3 { font-size: 1.2rem; }
  .article-card__meta { margin-top: 16px; }
  .article-card p { font-size: .875rem; }
  .signup { padding-block: 58px; }
  .email-row { flex-direction: column; }
  .email-row .button { min-height: 54px; }
  .image-caption { flex-direction: column; gap: 3px; }
  .breadcrumb { margin-bottom: 32px; }
  .footer-nav { display: grid; grid-template-columns: 1fr 1fr; }
  .site-footer { padding-top: 48px; }
}
@media (max-width: 360px) {
  .brand img { width: 120px; }
  .header-actions { gap: 6px; }
}