/* Blog shell. External file so blog HTML does not need <style> blocks or style attributes
   (report-only CSP style-src has no unsafe-inline). Header matches MarketingHeader:
   inline links from 1280px, menu button below that. */
@font-face {
  font-family: "Atlas Display";
  src: url("/atlas/fonts/libre-caslon-display-400.woff2") format("woff2");
  font-display: swap;
}

:root { color-scheme: light; }
body { margin: 0; background: #F7F4EC; font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.65; color: #1F2937; }
a { color: #0F766E; }
a:focus-visible { outline: 3px solid #BE5038; outline-offset: 3px; }

.mt-skip { position: absolute; left: -9999px; top: 0.75rem; z-index: 80; padding: 0.5rem 1rem; border-radius: 0.5rem; background: #203F35; color: #fff; font-weight: 700; font-size: 0.875rem; text-decoration: none; }
.mt-skip:focus { left: 1rem; }

.mt-header { position: sticky; top: 0; z-index: 40; background: #F7F4EC; border-bottom: 1px solid #DADFD6; }
.mt-header-inner { position: relative; max-width: 72rem; margin: 0 auto; padding: 0 1rem; min-height: 5rem; display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; }
.mt-logo { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; min-height: 2.75rem; height: 4rem; border-radius: 0.5rem; text-decoration: none; color: #14295E; font-family: "Atlas Display", "Libre Caslon Display", Georgia, serif; font-size: 22px; font-weight: 400; line-height: 1; letter-spacing: 0.01em; white-space: nowrap; }
.mt-logo img { display: block; flex: none; width: 30px; height: 30px; }
.mt-footer-brand a.mt-logo { color: #14295E; font-weight: 400; }

.mt-nav { display: flex; align-items: center; gap: 0.25rem; }
.mt-nav > a { display: none; align-items: center; text-decoration: none; color: #203F35; font-size: 0.875rem; font-weight: 600; padding: 0.45rem 0.5rem; border-radius: 0.5rem; white-space: nowrap; min-height: 2.75rem; }
.mt-nav > a:hover { color: #BE5038; background: rgba(32, 63, 53, 0.05); }
.mt-nav > a.mt-cta { background: #BE5038; color: #fff; border-radius: 999px; padding: 0.45rem 1rem; font-weight: 700; margin-left: 0.25rem; }
.mt-nav > a.mt-cta:hover { background: #A7442E; color: #fff; }
@media (min-width: 1024px) {
  .mt-nav > a { display: inline-flex; }
  .mt-mobile-nav { display: none !important; }
}
@media (max-width: 40rem) {
  .mt-header .mt-logo { height: 3.5rem; font-size: 18px; gap: 9px; }
  .mt-header .mt-logo img { width: 26px; height: 26px; }
  h1 { font-size: 1.8rem; }
}

.mt-mobile-nav { display: block; }
.mt-mobile-nav summary { display: flex; align-items: center; justify-content: center; width: 2.75rem; height: 2.75rem; border-radius: 0.75rem; cursor: pointer; list-style: none; color: #203F35; }
.mt-mobile-nav summary::-webkit-details-marker { display: none; }
.mt-mobile-nav summary:hover { background: rgba(32, 63, 53, 0.05); }
.mt-mobile-nav summary:focus-visible { outline: 3px solid #BE5038; outline-offset: 3px; }
.mt-menu-label { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.mt-mobile-nav[open] .mt-menu-label--open,
.mt-mobile-nav:not([open]) .mt-menu-label--close,
.mt-mobile-nav[open] .mt-icon-open,
.mt-mobile-nav:not([open]) .mt-icon-close { display: none; }
.mt-mobile-nav[open] summary { position: fixed; top: 0.75rem; right: 1rem; z-index: 70; color: #f3ece0; }
.mt-mobile-nav[open] summary:hover { background: rgba(255, 255, 255, 0.1); }
.mt-mobile-panel { display: none; }
.mt-mobile-nav[open] .mt-mobile-panel { display: flex; flex-direction: column; position: fixed; inset: 0; z-index: 60; overflow-y: auto; background: #203F35; color: #fff; padding: 1rem 1.25rem 2.5rem; }
.mt-mobile-brand { margin-bottom: 1.5rem; padding-right: 3rem; color: #f3ece0; }
.mt-mobile-panel .mt-logo { color: #f3ece0; }
.mt-mobile-panel nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.25rem; }
.mt-mobile-panel a { color: rgba(255, 255, 255, 0.92); text-decoration: none; }
.mt-mobile-main a { display: flex; align-items: center; min-height: 3.5rem; padding: 0 1rem; border-radius: 0.75rem; font-size: 1.25rem; font-weight: 700; }
.mt-mobile-more { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid rgba(255, 255, 255, 0.2); }
.mt-mobile-kicker { margin: 0 0 0.5rem; padding: 0 1rem; color: rgba(255, 255, 255, 0.7); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }
.mt-mobile-more a { display: flex; align-items: center; min-height: 2.75rem; padding: 0 1rem; border-radius: 0.75rem; font-size: 1rem; font-weight: 500; }
.mt-mobile-panel a:hover { background: rgba(255, 255, 255, 0.1); }
.mt-mobile-panel .mt-mobile-cta { justify-content: center; margin-top: 0.75rem; background: #BE5038; color: #fff; }
.mt-sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.container { max-width: 46rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
h1 { font-size: 2.25rem; line-height: 1.15; margin: 0 0 1rem; color: #0B2545; letter-spacing: -0.01em; }
.meta { color: #4B5563; margin-bottom: 2rem; font-size: 0.95rem; }
.content { font-size: 1.1rem; }
.content h2 { color: #0B2545; margin-top: 2rem; }
.content p { margin: 1rem 0; }
.content code { background: #F1EDE3; border-radius: 0.3rem; padding: 0.1rem 0.3rem; color: #0B2545; }
.content .article-visual { margin: 1.5rem 0 2rem; }
.content .article-visual img { display: block; width: 100%; height: auto; border-radius: 1rem; border: 1px solid #E7E1D2; background: #F1F6F4; }
.content .article-visual figcaption { margin-top: 0.65rem; color: #4B5563; font-size: 0.9rem; line-height: 1.5; }
.content .diagnostic-guide .mark-key-wrap { overflow-x: auto; margin: 1.25rem 0; border: 1px solid #D8D2C4; border-radius: 0.85rem; background: #FFFDF8; }
.content .diagnostic-guide .mark-key { width: 100%; min-width: 24rem; border-collapse: collapse; font-size: 0.98rem; }
.content .diagnostic-guide .mark-key caption { padding: 0.85rem 1rem 0.4rem; text-align: left; color: #0B2545; font-weight: 800; }
.content .diagnostic-guide .mark-key th, .content .diagnostic-guide .mark-key td { padding: 0.7rem 1rem; text-align: left; vertical-align: top; border-top: 1px solid #E7E1D2; }
.content .diagnostic-guide .response-pattern-comparison { display: grid; gap: 1rem; margin: 1.5rem 0 2rem; }
.content .diagnostic-guide .response-pattern-card { padding: 1.15rem; border: 1px solid #D8D2C4; border-left: 0.32rem solid #0F766E; border-radius: 0.9rem; background: #FFFDF8; box-shadow: 0 0.25rem 0.8rem rgba(11, 37, 69, 0.06); }
.content .diagnostic-guide .response-pattern-card h3 { margin: 0 0 0.8rem; color: #0B2545; font-size: 1.08rem; line-height: 1.35; }
.content .diagnostic-guide .response-pattern-card h4 { margin: 0 0 0.25rem; color: #0F766E; font-size: 0.82rem; letter-spacing: 0.08em; text-transform: uppercase; }
.content .diagnostic-guide .response-pattern-card p { margin: 0; }
.content .diagnostic-guide .pattern-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.85rem; }
.content .diagnostic-guide .pattern-columns > div { min-width: 0; padding: 0.8rem; border-radius: 0.65rem; background: #F1F6F4; }
.content .diagnostic-guide .teacher-opening { margin-top: 0.85rem; padding-top: 0.8rem; border-top: 1px solid #E7E1D2; font-size: 0.98rem; }
.content .diagnostic-guide .exchange-model { max-width: 32rem; margin-left: auto; margin-right: auto; }
@media (max-width: 40rem) {
  .content .diagnostic-guide .pattern-columns { grid-template-columns: minmax(0, 1fr); }
  .content .diagnostic-guide .mark-key { min-width: 0; font-size: 0.92rem; }
  .content .diagnostic-guide .mark-key th, .content .diagnostic-guide .mark-key td { padding: 0.65rem 0.7rem; }
}
.breadcrumb { font-size: 0.875rem; color: #4B5563; margin-bottom: 1rem; }
.mt-more { margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid #DADFD6; }
.mt-more h2 { margin: 0 0 0.75rem; color: #0B2545; font-size: 1.25rem; }
.mt-more ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.mt-back { margin-top: 2rem; }
.mt-index-intro { color: #64748b; margin-bottom: 2rem; }
.mt-index-card { margin-bottom: 2rem; padding-bottom: 2rem; border-bottom: 1px solid #e2e8f0; }
.mt-index-title { margin-bottom: 0.5rem; }
.mt-index-link { color: #0f172a; text-decoration: none; }
.mt-index-date { color: #64748b; font-size: 0.875rem; margin-bottom: 0.75rem; }
.mt-index-excerpt { color: #475569; }
.mt-index-more { color: #0d9488; }

.mt-footer { border-top: 1px solid #DADFD6; background: #F7F4EC; color: #53665C; font-size: 0.875rem; }
.mt-footer-inner { max-width: 72rem; margin: 0 auto; padding: 3.5rem 1rem 2.5rem; display: grid; gap: 2.5rem; }
@media (min-width: 64rem) { .mt-footer-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 2.6fr); } }
.mt-footer-brand p { margin: 0.75rem 0 0; max-width: 24rem; line-height: 1.5rem; }
.mt-footer-brand a { color: #203F35; font-weight: 600; }
.mt-footer-brand .mt-shop { text-decoration: underline; text-decoration-color: rgba(190, 80, 56, 0.45); text-underline-offset: 4px; }
.mt-footer-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem 1.5rem; }
@media (min-width: 40rem) { .mt-footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 64rem) { .mt-footer-nav { grid-template-columns: repeat(6, minmax(0, 1fr)); } }
.mt-footer-nav h2 { display: flex; align-items: center; gap: 0.5rem; margin: 0; font-size: 0.875rem; font-weight: 700; color: #203F35; }
.mt-footer-nav h2::before { content: ""; width: 0.5rem; height: 0.5rem; border-radius: 999px; background: #BE5038; }
.mt-footer-nav ul { list-style: none; margin: 0.75rem 0 0 3px; padding: 0 0 0 1rem; border-left: 1px solid #DADFD6; }
.mt-footer-nav a { display: inline-flex; align-items: center; min-height: 2.25rem; color: #53665C; font-weight: 600; text-decoration: none; }
.mt-footer-nav a:hover { color: #BE5038; }

.mt-newsletter { border-top: 1px solid #e2e8f0; background: #f8fafc; }
.mt-newsletter-inner { max-width: 40rem; margin: 0 auto; padding: 3.5rem 1.25rem; }
.mt-newsletter form { background: #fff; border: 1px solid #e2e8f0; border-radius: 1rem; padding: 1.5rem; box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06); }
.mt-newsletter h2, .mt-newsletter h3 { margin: 0; font-size: 1.125rem; color: #0f172a; }
.mt-newsletter-lead, .mt-newsletter label, .mt-newsletter-success { font-size: 1rem; line-height: 1.5; color: #475569; }
.mt-newsletter-email-label { display: block; margin-top: 1rem; font-weight: 600; color: #334155; }
.mt-newsletter input[type="email"] { box-sizing: border-box; width: 100%; min-height: 2.75rem; margin-top: 0.25rem; padding: 0.5rem 0.75rem; font-size: 1rem; border: 1px solid #cbd5e1; border-radius: 0.5rem; }
.mt-newsletter-consent { display: flex; align-items: flex-start; gap: 0.5rem; margin-top: 0.75rem; }
.mt-newsletter-consent input { width: 1rem; height: 1rem; margin-top: 0.2rem; }
.mt-newsletter-privacy { font-weight: 700; color: #115e59; }
.mt-newsletter button { min-height: 2.75rem; width: 100%; margin-top: 1rem; border: 0; border-radius: 0.5rem; background: #0f766e; color: #fff; font-size: 1rem; font-weight: 700; cursor: pointer; }
.mt-newsletter-sender { margin-top: 1rem; font-size: 0.75rem; line-height: 1.4; color: #64748b; }
.mt-newsletter-error { margin-top: 0.75rem; color: #b91c1c; font-size: 1rem; }
.mt-newsletter[hidden], .mt-newsletter [hidden] { display: none !important; }

.card { background: #fff; border: 1px solid #E7E1D2; border-radius: 1rem; padding: 1.5rem; }
.actions { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.button { display: inline-block; padding: 0.6rem 1rem; border-radius: 999px; text-decoration: none; font-weight: 600; }
.button.primary { background: #0F766E; color: #fff; }
.button.secondary { background: #fff; border: 1px solid #E7E1D2; color: #0B2545; }
.status { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: #4B5563; }