/* SystemDuo RS - shared page foundation
 * Draft based on recurring patterns (28 September 2026).
 * Load after Astra. Wrap custom page content in .sd-site.
 * Keep header/footer, plugin forms, and page-specific layouts in their own CSS.
 */

:root {
  --sd-dark: #0e363c;
  --sd-dark-deep: #092a2f;
  --sd-green: #1ec099;
  --sd-mint: #45eac2;
  --sd-accent: #38d8da;
  --sd-ink: #17383d;
  --sd-muted: #607477;
  --sd-line: #dce8e6;
  --sd-soft: #f3f9f7;
  --sd-white: #fff;
  --sd-container: 1240px;
  --sd-reading-width: 760px;
  --sd-gutter: 20px;
  --sd-space-section: clamp(64px, 8vw, 104px);
  --sd-radius-card: 18px;
  --sd-shadow-card: 0 12px 34px rgba(14, 54, 60, .08);
  --sd-font-body: "Open Sans", Arial, sans-serif;
  --sd-font-heading: "Plus Jakarta Sans", "Open Sans", Arial, sans-serif;
}

/* Opt-in page scope; avoids changing Astra, admin screens, and plugin markup. */
.sd-site {
  color: var(--sd-ink);
  font-family: var(--sd-font-body);
  font-size: 17px;
  line-height: 1.7;
}
.sd-site, .sd-site *, .sd-site *::before, .sd-site *::after { box-sizing: border-box; }
.sd-site :where(h1, h2, h3, p, ul, ol, figure) { margin-top: 0; }
.sd-site :where(h1, h2, h3) {
  color: var(--sd-dark);
  font-family: var(--sd-font-heading);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: 1.14;
}
.sd-site h1 { font-size: clamp(2.55rem, 5.5vw, 4.7rem); line-height: 1.06; }
.sd-site h2 { font-size: clamp(2rem, 3.8vw, 3.15rem); }
.sd-site h3 { font-size: clamp(1.2rem, 2vw, 1.4rem); letter-spacing: -.02em; }
.sd-site :where(img, svg) { max-width: 100%; }
.sd-site img { height: auto; }
.sd-site a { text-underline-offset: .18em; }
.sd-site :where(a, button, input, select, textarea, summary):focus-visible {
  outline: 3px solid var(--sd-accent);
  outline-offset: 3px;
}

/* Put .sd-container inside a section; avoid nesting it in Astra's narrow layout. */
.sd-container { width: min(calc(100% - 2 * var(--sd-gutter)), var(--sd-container)); margin-inline: auto; }
.sd-container--narrow { max-width: var(--sd-reading-width); }
.sd-section { padding-block: var(--sd-space-section); }
.sd-section--soft { background: var(--sd-soft); }
.sd-section--dark { background: var(--sd-dark); color: #d8eeeb; }
.sd-section--dark :where(h1, h2, h3) { color: var(--sd-white); }

/* For a centered section constrained by an outer Astra container. */
.sd-band { clip-path: inset(0 -100vmax); }
.sd-band--soft { background: var(--sd-soft); box-shadow: 0 0 0 100vmax var(--sd-soft); }
.sd-band--dark { background: var(--sd-dark); box-shadow: 0 0 0 100vmax var(--sd-dark); color: #d8eeeb; }
.sd-band--dark :where(h1, h2, h3) { color: var(--sd-white); }

.sd-eyebrow {
  margin-bottom: 14px;
  color: #087a63;
  font-family: var(--sd-font-heading);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .13em;
  line-height: 1.4;
  text-transform: uppercase;
}
.sd-section--dark .sd-eyebrow, .sd-band--dark .sd-eyebrow { color: var(--sd-mint); }
.sd-lead { max-width: 720px; color: var(--sd-muted); font-size: clamp(1.05rem, 1.8vw, 1.22rem); }
.sd-section--dark .sd-lead, .sd-band--dark .sd-lead { color: #d9eeeb; }
.sd-section-heading { max-width: 770px; margin-bottom: clamp(34px, 5vw, 56px); }
.sd-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

.sd-site .sd-button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: 999px;
  font-family: var(--sd-font-heading);
  font-size: .92rem;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}
.sd-site .sd-button:hover { transform: translateY(-2px); }
.sd-site .sd-button--primary { background: var(--sd-green); color: var(--sd-dark); }
.sd-site .sd-button--primary:hover { background: var(--sd-mint); color: var(--sd-dark); }
.sd-site .sd-button--secondary { border-color: #bcded7; background: var(--sd-white); color: var(--sd-dark); }
.sd-site .sd-button--secondary:hover { border-color: var(--sd-green); background: #effbf8; color: var(--sd-dark); }
.sd-site .sd-button--light { background: var(--sd-white); color: var(--sd-dark); }
.sd-site .sd-button--light:hover { background: var(--sd-mint); color: var(--sd-dark); }
.sd-site .sd-button--outline-light { border-color: rgba(255,255,255,.6); color: var(--sd-white); }
.sd-site .sd-button--outline-light:hover { border-color: var(--sd-white); background: var(--sd-white); color: var(--sd-dark); }

.sd-card {
  min-width: 0;
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--sd-line);
  border-radius: var(--sd-radius-card);
  background: var(--sd-white);
  box-shadow: var(--sd-shadow-card);
}
.sd-grid { display: grid; gap: clamp(18px, 2.5vw, 28px); }
.sd-grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.sd-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (max-width: 800px) {
  .sd-grid--three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  :root { --sd-gutter: 14px; }
  .sd-grid--two, .sd-grid--three { grid-template-columns: minmax(0, 1fr); }
  .sd-site .sd-button { max-width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .sd-site .sd-button { transition: none; }
  .sd-site .sd-button:hover { transform: none; }
}