:root {
  --brand: #147D63;
  --brand-dark: #0F5F4C;
  --brand-soft: #D8F3DC;
  --brand-faint: #EFFFEE;
  --ink: #10231E;
  --text: #30423D;
  --muted: #6B7D77;
  --line: #D9E4E0;
  --surface: #FFFFFF;
  --surface-soft: #F6FAF8;
  --shadow: 0 18px 50px rgba(16, 35, 30, 0.10);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--surface);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body::selection {
  background: var(--brand-soft);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(217, 228, 224, 0.9);
  backdrop-filter: blur(18px);
}

.nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  font-size: 18px;
}

.brand-link img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.nav-links a:hover {
  color: var(--brand);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 800;
  font-size: 14px;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--brand);
  color: #FFFFFF;
  box-shadow: 0 12px 28px rgba(20, 125, 99, 0.24);
}

.btn-primary:hover {
  background: var(--brand-dark);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--brand-dark);
  border-color: rgba(20, 125, 99, 0.22);
}

.btn-secondary:hover {
  border-color: var(--brand);
  box-shadow: 0 10px 24px rgba(16, 35, 30, 0.08);
}

main {
  flex: 1;
}

.page-shell {
  width: min(980px, calc(100% - 44px));
  margin: 0 auto;
  padding: 76px 0;
}

.page-shell-narrow {
  width: min(740px, calc(100% - 44px));
}

.page-hero {
  margin-bottom: 30px;
}

.section-kicker {
  color: var(--brand);
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
  letter-spacing: 0;
  margin-bottom: 8px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  color: var(--ink);
  font-size: 46px;
  line-height: 1.08;
  letter-spacing: 0;
  margin-bottom: 14px;
}

h2 {
  color: var(--ink);
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: 0;
  margin: 34px 0 10px;
}

.lead,
.meta,
.content-card p,
.content-card li {
  color: var(--muted);
}

.lead {
  font-size: 17px;
  max-width: 660px;
  margin-bottom: 0;
}

.meta {
  font-size: 15px;
  margin-bottom: 0;
}

.content-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #FFFFFF;
  box-shadow: var(--shadow);
  padding: 30px;
}

.content-card p {
  font-size: 16px;
  margin-bottom: 16px;
}

.content-card p:last-child {
  margin-bottom: 0;
}

.content-card ul {
  margin: 0 0 18px 22px;
  padding: 0;
}

.content-card li {
  margin-bottom: 8px;
}

.content-card a:not(.btn) {
  color: var(--brand-dark);
  font-weight: 750;
}

.content-card a:not(.btn):hover {
  color: var(--brand);
}

.support-actions,
.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.video-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #FFFFFF;
  box-shadow: var(--shadow);
  padding: 10px;
  overflow: hidden;
}

.video-card video {
  display: block;
  width: 100%;
  border-radius: 6px;
  background: var(--ink);
}

footer {
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  padding: 26px 22px;
}

.footer-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a:hover {
  color: #FFFFFF;
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  h1 {
    font-size: 38px;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

  .nav {
    padding: 12px 16px;
  }

  .brand-link span {
    display: none;
  }

  .page-shell,
  .page-shell-narrow {
    width: min(100% - 32px, 980px);
    padding: 48px 0;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 22px;
  }

  .content-card {
    padding: 22px;
  }
}