:root {
  color-scheme: dark;
  --sf-bg: #050515;
  --sf-gradient: radial-gradient(circle at top, rgba(18, 165, 148, 0.14), transparent 55%);
  --sf-surface: #0b0b1b;
  --sf-surface-muted: #101024;
  --sf-primary: #12a594;
  --sf-primary-hover: #0d8075;
  --sf-primary-soft: rgba(18, 165, 148, 0.14);
  --sf-on-primary: #ecfdf7;
  --sf-text: #ecf4ff;
  --sf-muted: #9aa5c3;
  --sf-border: rgba(116, 132, 168, 0.18);
  --sf-shadow: 0 40px 90px rgba(7, 53, 49, 0.4);
  --sf-radius: 18px;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

a {
  color: var(--sf-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--sf-on-primary);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--sf-gradient), var(--sf-bg);
  color: var(--sf-text);
}

.sf-container {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.sf-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(5, 5, 21, 0.78);
  border-bottom: 1px solid rgba(116, 132, 168, 0.12);
  backdrop-filter: blur(12px);
}

.sf-header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
}

.sf-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 600;
  font-size: 1.1rem;
  color: inherit;
}

.sf-logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.9rem;
  background: var(--sf-primary);
  color: var(--sf-on-primary);
  font-weight: 700;
  box-shadow: 0 16px 35px rgba(18, 165, 148, 0.35);
}

.sf-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.sf-nav__link {
  font-weight: 500;
  color: var(--sf-muted);
}

.sf-nav__link:hover {
  color: var(--sf-on-primary);
}

.sf-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.65rem 1.6rem;
  font-weight: 600;
  transition: all 0.2s ease;
  cursor: pointer;
}

.sf-button--ghost {
  border-color: rgba(18, 165, 148, 0.4);
  color: var(--sf-on-primary);
  background: rgba(18, 165, 148, 0.08);
}

.sf-button--ghost:hover {
  border-color: rgba(18, 165, 148, 0.8);
  background: rgba(18, 165, 148, 0.18);
}

.sf-button {
  background: var(--sf-primary);
  color: var(--sf-on-primary);
  box-shadow: 0 22px 35px rgba(18, 165, 148, 0.3);
}

.sf-button:hover {
  background: var(--sf-primary-hover);
  box-shadow: 0 26px 45px rgba(18, 165, 148, 0.4);
}

.sf-hero {
  position: relative;
  padding: clamp(4rem, 8vw, 6rem) 0 clamp(3rem, 6vw, 5rem);
  overflow: hidden;
  background: transparent;
}

.sf-hero__visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.sf-hero__video,
.sf-hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.1);
  pointer-events: none;
}

.sf-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 5, 21, 0.15) 0%, rgba(5, 5, 21, 0.25) 55%, rgba(5, 5, 21, 0.45) 100%);
  pointer-events: none;
}

.sf-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 3.5rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: start;
}

.sf-eyebrow {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(236, 253, 247, 0.8);
  font-weight: 600;
  margin: 0 0 0.85rem;
}

.sf-hero__copy {
  padding: clamp(1.6rem, 4vw, 2.8rem);
  border-radius: calc(var(--sf-radius) * 0.9);
  background: rgba(5, 5, 21, 0.45);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(18, 165, 148, 0.12);
  box-shadow: 0 32px 70px rgba(5, 5, 21, 0.45);
}

.sf-hero__copy h1 {
  margin: 0;
  font-size: clamp(2.4rem, 4vw, 3.5rem);
  line-height: 1.1;
}

.sf-hero__body {
  max-width: 560px;
  margin-top: 1.4rem;
  color: var(--sf-muted);
  font-size: 1.05rem;
}

.sf-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 2.4rem 0 1.6rem;
}

.sf-meta-note {
  display: grid;
  gap: 0.6rem;
  max-width: 420px;
  color: var(--sf-muted);
  font-size: 0.95rem;
}

.sf-meta-note__badge {
  display: inline-flex;
  align-self: start;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: rgba(18, 165, 148, 0.18);
  color: var(--sf-on-primary);
  font-weight: 600;
  font-size: 0.78rem;
}

.sf-hero__panel {
  display: flex;
  justify-content: center;
}

.sf-card {
  background: var(--sf-surface-muted);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius);
  padding: 2.2rem;
  box-shadow: var(--sf-shadow);
}

.sf-card h2 {
  margin-top: 0;
}

.sf-card ul {
  margin: 1.4rem 0 0;
  padding-left: 1.25rem;
  color: var(--sf-muted);
  line-height: 1.7;
}

.sf-section {
  padding: clamp(3.8rem, 7vw, 5.5rem) 0;
}

.sf-section--light {
  background: rgba(11, 11, 27, 0.72);
  backdrop-filter: blur(16px);
  border-block: 1px solid rgba(116, 132, 168, 0.14);
}

.sf-section__title {
  text-align: center;
  margin-top: 0;
  margin-bottom: clamp(2.2rem, 4vw, 3.2rem);
}

.sf-grid {
  display: grid;
  gap: 1.8rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.sf-feature-card {
  background: var(--sf-surface-muted);
  border-radius: var(--sf-radius);
  border: 1px solid var(--sf-border);
  padding: 1.85rem;
  box-shadow: 0 26px 55px rgba(5, 5, 21, 0.45);
}

.sf-feature-card h3 {
  margin-top: 0;
}

.sf-feature-card p {
  color: var(--sf-muted);
  margin-bottom: 0;
}

.sf-resources {
  display: grid;
  gap: 2.6rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.sf-resource-list {
  list-style: none;
  padding: 0;
  margin: 1.3rem 0 0;
  display: grid;
  gap: 1rem;
}

.sf-resource-list__label {
  display: block;
  color: var(--sf-muted);
  font-size: 0.85rem;
}

.sf-footer {
  background: rgba(5, 5, 21, 0.88);
  border-top: 1px solid rgba(116, 132, 168, 0.14);
  padding: 2.6rem 0;
}

.sf-footer__content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.6rem;
  color: var(--sf-muted);
  font-size: 0.95rem;
}

.sf-footer__links {
  display: flex;
  gap: 1.2rem;
}

.sf-footer__links a {
  color: var(--sf-muted);
}

.sf-footer__links a:hover {
  color: var(--sf-on-primary);
}

@media (max-width: 640px) {
  .sf-header__content {
    flex-direction: column;
    gap: 1.1rem;
  }

  .sf-nav {
    width: 100%;
    justify-content: center;
  }

  .sf-cta {
    flex-direction: column;
    align-items: flex-start;
  }
}