.fst-case-study {
  --navy: #101d35;
  --blue: #2457d6;
  --blue-dark: #1945b3;
  --ink: #202b3c;
  --muted: #667085;
  --line: #e6eaf0;
  --soft: #f5f8fc;
  --white: #fff;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(16, 29, 53, .08);
  color: var(--ink);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}
a { color: var(--blue); text-decoration: none; }
.fst-case-study a:hover { text-decoration: underline; }
.fst-case-study .fst-container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.fst-case-study .hero {
  color: #fff;
  padding: 88px 0 76px;
  background: radial-gradient(circle at 85% 15%, rgba(76, 124, 255, .32), transparent 30%),
              linear-gradient(125deg, #101d35 0%, #142c53 62%, #1e4381 100%);
  overflow: hidden;
}
.fst-case-study .eyebrow { display: inline-block; color: #c8d8ff; font-weight: 750; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 18px; }
.fst-case-study h1, .fst-case-study h2, .fst-case-study h3 { font-family: inherit; font-weight: 700; line-height: 1.2; letter-spacing: -.035em; }
.fst-case-study h1 { color: #fff; max-width: 850px; font-size: clamp(2.3rem, 5.2vw, 4.35rem); margin: 0 0 22px; }
.fst-case-study .hero p { max-width: 760px; color: #dce6f8; font-size: 1.14rem; margin: 0; }
.fst-case-study .actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }
.fst-case-study .fst-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 20px; border-radius: 9px; font-weight: 750; transition: .2s ease; }
.fst-case-study .fst-btn-primary { color: #10203c; background: #fff; }
.fst-case-study .fst-btn-primary:hover { background: #eaf0ff; text-decoration: none; transform: translateY(-1px); }
.fst-case-study .fst-btn-outline { color: #fff; border: 1px solid rgba(255,255,255,.55); }
.fst-case-study .fst-btn-outline:hover { background: rgba(255,255,255,.1); text-decoration: none; }
.fst-case-study .hero-visual { margin-top: 54px; padding: 12px; border: 1px solid rgba(255,255,255,.22); border-radius: 16px; background: rgba(255,255,255,.08); box-shadow: 0 24px 60px rgba(0,0,0,.2); }
.fst-case-study .browser-bar { height: 34px; display: flex; align-items: center; gap: 6px; padding: 0 10px; }
.fst-case-study .dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.65); }
.fst-case-study .hero-visual picture { display: block; }
.fst-case-study .hero-visual img { display: block; width: 100%; height: auto; border-radius: 9px; }
.fst-case-study .fst-content { padding: 64px 0 80px; }
.fst-case-study .layout { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: 54px; align-items: start; }
.fst-case-study article section { padding: 0 0 54px; margin: 0 0 52px; border-bottom: 1px solid var(--line); scroll-margin-top: 90px; }
.fst-case-study article section:last-child { border-bottom: 0; }
.fst-case-study .section-kicker { color: var(--blue); font-weight: 800; text-transform: uppercase; letter-spacing: .1em; font-size: .74rem; margin-bottom: 10px; }
.fst-case-study h2 { color: var(--navy); font-size: clamp(1.75rem, 3vw, 2.45rem); margin: 0 0 20px; }
.fst-case-study h3 { color: var(--navy); font-size: 1.25rem; margin: 28px 0 10px; }
p { margin: 0 0 16px; }
.fst-case-study .fst-lead { font-size: 1.08rem; color: #46536a; }
.fst-case-study .overview { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 24px; padding: 24px; background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius); }
.fst-case-study .overview div { padding: 10px 0; border-bottom: 1px solid #e3e9f2; }
.fst-case-study .overview div:nth-last-child(-n+2) { border-bottom: 0; }
.fst-case-study .overview strong { display: block; color: #7a8495; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; }
.fst-case-study .overview span { color: var(--navy); font-weight: 700; }
.fst-case-study .feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; margin-top: 24px; }
.fst-case-study .feature-card { padding: 22px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.fst-case-study .feature-card h3 { margin: 0 0 9px; font-size: 1.08rem; }
.fst-case-study .feature-card p { color: var(--muted); margin: 0; font-size: .95rem; }
.fst-case-study .fst-steps { counter-reset: step; display: grid; gap: 13px; margin: 24px 0 0; padding: 0; list-style: none; }
.fst-case-study .fst-steps li { counter-increment: step; position: relative; padding: 17px 18px 17px 62px; border: 1px solid var(--line); border-radius: 12px; }
.fst-case-study .fst-steps li::before { content: counter(step); position: absolute; left: 18px; top: 17px; width: 29px; height: 29px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); font-weight: 800; font-size: .86rem; }
.fst-case-study .fst-steps strong { display: block; color: var(--navy); }
.fst-case-study .callout { padding: 24px; background: #f1f5ff; border-left: 4px solid var(--blue); border-radius: 0 12px 12px 0; margin: 24px 0; }
.fst-case-study .formula { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; padding: 22px; border-radius: 14px; background: var(--navy); color: #fff; margin-top: 22px; }
.fst-case-study .formula span { padding: 7px 11px; border: 1px solid rgba(255,255,255,.25); border-radius: 7px; font-size: .9rem; }
.fst-case-study .formula b { color: #a9c2ff; }
.fst-case-study .toc { position: sticky; top: 90px; max-height: calc(100vh - 114px); overflow-y: auto; padding: 22px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.fst-case-study .toc nav { height: auto; background: transparent; line-height: inherit; box-shadow: none; }
.fst-case-study .toc h3 { margin: 0 0 14px; font-size: 1rem; }
.fst-case-study .toc a { display: block; padding: 7px 0; color: #596579; font-size: .88rem; border-bottom: 1px solid #f0f2f5; }
.fst-case-study .toc a:last-child { border: 0; }
.fst-case-study .check-list { padding-left: 22px; }
.fst-case-study .check-list li { margin: 9px 0; }
.fst-case-study details { border-bottom: 1px solid var(--line); padding: 17px 0; }
.fst-case-study summary { color: var(--navy); cursor: pointer; font-weight: 750; }
.fst-case-study details p { color: #586579; margin: 12px 0 0; }
.fst-case-study .cta { text-align: center; padding: 46px 32px; color: #fff; background: linear-gradient(125deg, #101d35, #1c4388); border-radius: 20px; }
.fst-case-study .cta h2 { color: #fff; max-width: 720px; margin: 0 auto 15px; }
.fst-case-study .cta p { color: #dce6f8; max-width: 720px; margin: 0 auto; }
.fst-case-study .cta .actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 700px;
  margin-inline: auto;
}
.fst-case-study .cta .fst-btn { line-height: 1.35; }
.fst-case-study .cta .cta-explore { grid-column: 1 / -1; justify-self: center; }
@media (max-width: 850px) {
  .fst-case-study .layout { grid-template-columns: 1fr; }
  .fst-case-study .toc { position: static; order: -1; max-height: none; overflow: visible; }
  .fst-case-study .toc nav { columns: 2; }
}
@media (max-width: 600px) {
  .fst-case-study .fst-container { width: min(100% - 28px, 1120px); }
  .fst-case-study .hero { padding: 62px 0 54px; }
  .fst-case-study .cta { padding: 36px 20px; }
  .fst-case-study .cta .actions { grid-template-columns: minmax(0, 1fr); }
  .fst-case-study .cta .cta-explore { justify-self: stretch; }
  .fst-case-study .fst-content { padding: 42px 0 56px; }
  .fst-case-study .overview, .fst-case-study .feature-grid { grid-template-columns: 1fr; }
  .fst-case-study .overview div:nth-last-child(2) { border-bottom: 1px solid #e3e9f2; }
  .fst-case-study .toc nav { columns: 1; }
  .fst-case-study .hero-visual img { max-height: 340px; object-fit: cover; object-position: top; }
}