.sf-proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(100% - 2rem, 76rem);
  margin: 0 auto;
  border: 1px solid #dce3ed;
  border-radius: 1.2rem;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 18px 50px rgba(20, 31, 52, .07);
}

.sf-proof-strip > div {
  padding: 1.2rem 1.3rem;
  border-right: 1px solid #dce3ed;
}

.sf-proof-strip > div:last-child { border-right: 0; }
.sf-proof-strip strong, .sf-proof-strip span { display: block; }
.sf-proof-strip strong { color: #172033; font-size: 1rem; }
.sf-proof-strip span { margin-top: .3rem; color: #687489; font-size: .78rem; line-height: 1.45; }

.sf-screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.sf-screenshot {
  margin: 0;
  overflow: hidden;
  border: 1px solid #d7e0ea;
  border-radius: 1.15rem;
  background: #fff;
  box-shadow: 0 18px 45px rgba(20, 31, 52, .08);
}

.sf-screenshot-featured { grid-column: 1 / -1; }
.sf-screenshot img { display: block; width: 100%; height: auto; background: #eef3f8; }
.sf-screenshot figcaption { display: grid; grid-template-columns: auto 1fr; gap: .12rem .7rem; padding: .9rem 1rem 1rem; border-top: 1px solid #e1e7ef; }
.sf-screenshot figcaption span { grid-row: 1 / span 2; color: #1769e0; font-size: .74rem; font-weight: 850; letter-spacing: .08em; }
.sf-screenshot figcaption strong { color: #172033; font-size: .95rem; }
.sf-screenshot figcaption small { color: #687489; line-height: 1.4; }

.sf-screenshot-grid-compact { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.sf-screenshot-grid-compact .sf-screenshot figcaption { grid-template-columns: 1fr; }
.sf-screenshot-grid-compact .sf-screenshot figcaption span { grid-row: auto; }

.sf-boundary-table {
  overflow: hidden;
  margin-top: 1.5rem;
  border: 1px solid #dce3ed;
  border-radius: 1.1rem;
  background: #fff;
}

.sf-boundary-table > div {
  display: grid;
  grid-template-columns: minmax(15rem, 1.4fr) minmax(8rem, .6fr) minmax(11rem, .8fr);
  gap: 1rem;
  align-items: center;
  padding: .85rem 1rem;
  border-bottom: 1px solid #e5eaf1;
}

.sf-boundary-table > div:last-child { border-bottom: 0; }
.sf-boundary-head { background: #172033; color: #fff; }
.sf-boundary-table span { color: #354258; }
.sf-boundary-table b { color: #16856b; }
.sf-boundary-table em { color: #7b5b17; font-style: normal; }

.sf-system-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 1rem;
  align-items: stretch;
  margin: 2rem 0;
}

.sf-system-flow article {
  padding: 1.25rem;
  border: 1px solid #d8e0ea;
  border-radius: 1rem;
  background: #fff;
}

.sf-system-flow article span { color: #1769e0; font-size: .7rem; font-weight: 850; letter-spacing: .08em; }
.sf-system-flow article h3 { margin: .55rem 0; color: #172033; }
.sf-system-flow article p { margin: 0; color: #637086; line-height: 1.6; }
.sf-system-flow > i { align-self: center; color: #1769e0; font-size: 1.5rem; font-style: normal; }

.sf-library-head { max-width: 58rem; }
.sf-doc-path {
  display: flex;
  gap: .7rem;
  align-items: center;
  flex-wrap: wrap;
  margin: 2rem 0 3rem;
  padding: 1rem 1.2rem;
  border: 1px solid #dbe3ed;
  border-radius: 1rem;
  background: #f7f9fc;
}

.sf-doc-path span { color: #687489; font-size: .68rem; font-weight: 850; letter-spacing: .09em; }
.sf-doc-path a { color: #1769e0; font-size: .86rem; font-weight: 800; text-decoration: none; }
.sf-doc-path i { color: #a7b4c5; font-style: normal; }
.sf-doc-section { margin: 3rem 0; }
.sf-doc-section > header { max-width: 46rem; margin-bottom: 1.3rem; }
.sf-doc-section > header h2 { margin: .35rem 0 0; color: #172033; font-size: clamp(1.7rem, 4vw, 2.8rem); }

.sf-doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.sf-doc-card {
  display: block;
  padding: clamp(1.25rem, 3vw, 1.8rem);
  border: 1px solid #d9e1eb;
  border-radius: 1.1rem;
  background: #fff;
  color: inherit;
  text-decoration: none;
  box-shadow: 0 14px 38px rgba(20, 31, 52, .06);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.sf-doc-card:hover { transform: translateY(-3px); border-color: #8ab5ee; box-shadow: 0 20px 45px rgba(20, 31, 52, .1); }
.sf-doc-card-featured { border-top: 4px solid #1769e0; }
.sf-doc-card > span { color: #1769e0; font-size: .7rem; font-weight: 850; letter-spacing: .09em; }
.sf-doc-card h2, .sf-doc-card h3 { margin: .65rem 0; color: #172033; line-height: 1.15; }
.sf-doc-card p { margin: 0; color: #637086; line-height: 1.6; }

.sf-doc-shot {
  margin: 1.7rem 0;
  overflow: hidden;
  border: 1px solid #d7e0ea;
  border-radius: 1rem;
  background: #fff;
}

.sf-doc-shot img { display: block; width: 100%; height: auto; }
.sf-doc-shot figcaption { padding: .7rem 1rem; border-top: 1px solid #e3e8ef; color: #6b778b; font-size: .82rem; }

@media (max-width: 960px) {
  .sf-screenshot-grid-compact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sf-system-flow { grid-template-columns: 1fr; }
  .sf-system-flow > i { justify-self: center; transform: rotate(90deg); }
}

@media (max-width: 760px) {
  .sf-proof-strip, .sf-screenshot-grid, .sf-doc-grid { grid-template-columns: 1fr; }
  .sf-proof-strip > div { border-right: 0; border-bottom: 1px solid #dce3ed; }
  .sf-proof-strip > div:last-child { border-bottom: 0; }
  .sf-screenshot-featured { grid-column: auto; }
  .sf-boundary-table { overflow-x: auto; }
  .sf-boundary-table > div { min-width: 44rem; }
}

@media (max-width: 520px) {
  .sf-screenshot-grid-compact { grid-template-columns: 1fr; }
  .sf-proof-strip { width: min(100% - 1.2rem, 76rem); }
  .sf-doc-path { align-items: flex-start; flex-direction: column; }
  .sf-doc-path i { display: none; }
}