:root {
  --sf-bg: #050712;
  --sf-bg-alt: #0b0f1e;
  --sf-surface: #111827;
  --sf-surface-soft: #171c27;

  --sf-border-subtle: #1f2937;
  --sf-text: #f9fafb;
  --sf-text-muted: #d1d5db;
  --sf-accent: #f97316;
  --sf-accent-soft: #fb923c;
  --sf-accent-deep: #8f3416;
  --sf-accent-glow: rgba(249, 115, 22, 0.3);

  --sf-metal: #9ca3af;
  --sf-radius-lg: 18px;
  --sf-radius-md: 12px;
  --sf-radius-pill: 999px;
  --sf-shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.55);
  --sf-shadow-subtle: 0 10px 26px rgba(0, 0, 0, 0.4);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, #152132 0, #020308 80%),
    radial-gradient(circle at bottom right, #020617 0, #000 40%);
  color: var(--sf-text);
  line-height: 1.6;
}

/* Skip link */

.sf-skip-link {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.4rem 0.75rem;
  background: #f9fafb;
  color: #020617;
  border-radius: 0.375rem;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform 0.15s ease;
  z-index: 9999;
  font-size: 0.85rem;
}

.sf-skip-link:focus,
.sf-skip-link:focus-visible {
  transform: translateY(0);
}

/* Layout */

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.sf-container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

main {
  flex: 1;
}

/* Typography */

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.75rem;
  font-weight: 600;
}

.sf-section h2 {
  font-size: 1.6rem;
}

.sf-section h3 {
  font-size: 1.1rem;
}

/* Sections */

.sf-section {
  padding: 3.3rem 0;
  background: transparent;
}

.sf-section-alt {
  background: radial-gradient(circle at top right, #111827 0, #020308 60%);
}

.sf-section-intro {
  color: var(--sf-text-muted);
  max-width: 38rem;
  margin-bottom: 1.4rem;
}

/* Header */

.sf-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(to right, rgba(2, 6, 23, 0.92), rgba(15, 23, 42, 0.92));
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.3);
}

.sf-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
}

.sf-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sf-logo-img {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  object-fit: contain;
  background: #020617;
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.9);
}

.sf-logo-text {
  display: flex;
  flex-direction: column;
}

.sf-logo-title {
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.sf-logo-subtitle {
  font-size: 0.78rem;
  color: var(--sf-text-muted);
}

/* Navigation */

.sf-nav {
  display: flex;
  gap: 1.25rem;
}

.sf-nav a {
  text-decoration: none;
  color: var(--sf-text-muted);
  font-size: 0.9rem;
  transition: color 0.15s ease, transform 0.12s ease;
}

.sf-nav a:hover,
.sf-nav a:focus-visible {
  color: var(--sf-accent-soft);
  transform: translateY(-1px);
}

/* Focus */

a:focus-visible,
.sf-btn:focus-visible {
  outline: 2px solid var(--sf-accent-soft);
  outline-offset: 3px;
}

/* Hero */

.sf-hero {
  padding-top: 3.4rem;
  padding-bottom: 3.2rem;
}

.sf-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: center;
}

.sf-hero-kicker {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--sf-text-muted);
  margin-bottom: 0.9rem;
}

.sf-hero-text h1 {
  font-size: clamp(2.1rem, 3vw, 2.7rem);
  line-height: 1.18;
  margin-bottom: 1rem;
}

.sf-hero-text h1 span {
  color: var(--sf-accent-soft);
}

.sf-hero-sub {
  font-size: 0.98rem;
  color: var(--sf-text-muted);
  max-width: 32rem;
  margin-bottom: 1.4rem;
}

.sf-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.sf-hero-note {
  font-size: 0.88rem;
  color: var(--sf-metal);
}

/* Buttons */

.sf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--sf-radius-pill);
  padding: 0.7rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    transform 0.1s ease,
    box-shadow 0.1s ease,
    filter 0.12s ease;
}

.sf-btn-primary {
  background:
    radial-gradient(circle at 30% 0, #fed7aa 0, var(--sf-accent-soft) 38%, var(--sf-accent-deep) 100%);
  border-color: rgba(248, 250, 252, 0.08);
  color: #020617;
  box-shadow:
    0 12px 30px var(--sf-accent-glow),
    0 0 0 1px rgba(248, 250, 252, 0.03);
}

.sf-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 18px 40px var(--sf-accent-glow),
    0 0 0 1px rgba(248, 250, 252, 0.06);
  filter: brightness(1.03);
}

.sf-btn-arrow {
  font-size: 1.1rem;
  transform: translateY(1px);
}

.sf-btn-ghost {
  background: rgba(15, 23, 42, 0.8);
  border-color: rgba(148, 163, 184, 0.45);
  color: var(--sf-text);
}

.sf-btn-ghost:hover {
  border-color: var(--sf-accent-soft);
  color: var(--sf-accent-soft);
  transform: translateY(-1px);
}

.sf-btn-full {
  width: 100%;
}

/* Inline link CTA */

.sf-inline-link {
  font-size: 0.9rem;
  color: var(--sf-accent-soft);
  text-decoration: none;
}

.sf-inline-link:hover,
.sf-inline-link:focus-visible {
  text-decoration: underline;
}

/* Hero card */

.sf-hero-card {
  background: radial-gradient(circle at top, #1e1f2a 0, #050712 70%);
  border-radius: 22px;
  padding: 1.8rem 1.7rem;
  border: 1px solid var(--sf-border-subtle);
  box-shadow: var(--sf-shadow-soft);
}

.sf-hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}

.sf-hero-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--sf-text);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.sf-hero-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.86rem;
}

.sf-hero-card-blurb {
  margin: 0;
  color: var(--sf-text-muted);
}

.sf-hero-stats {
  margin: 0;
  padding: 0;
}

.sf-hero-stats dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--sf-text-muted);
  margin-top: 0.4rem;
}

.sf-hero-stats dd {
  margin: 0.15rem 0 0.35rem;
  font-weight: 600;
  color: var(--sf-text);
}

.sf-hero-bullets {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.84rem;
  color: var(--sf-text-muted);
}

.sf-hero-bullets li {
  margin-bottom: 0.35rem;
}

p, li {
  text-wrap: pretty;
}

/* Grids */

.sf-grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 2.3rem;
  align-items: flex-start;
}

.sf-grid-2 > div,
.sf-grid-2 > article {
  margin-top: 0;
  padding: 0.4rem 0.8rem;
}

.sf-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.7rem;
}

/* Cards & lists */

.sf-card {
  background: var(--sf-surface-soft);
  border-radius: var(--sf-radius-md);
  border: 1px solid var(--sf-border-subtle);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--sf-shadow-subtle);
}

.sf-card h3 {
  margin-top: 0;
  margin-bottom: 0.7rem;
  font-size: 1.05rem;
}

.sf-list {
  padding-left: 1.15rem;
  margin: 0;
  color: var(--sf-text-muted);
  font-size: 0.92rem;
}

.sf-list li {
  margin-bottom: 0.4rem;
}

.sf-list-ordered {
  list-style: decimal;
}

.sf-inside-grid {
  margin-top: 1.2rem;
}

/* Join panel */

.sf-join-grid {
  align-items: stretch;
}

.sf-join-panel {
  background: radial-gradient(circle at top, #1f2937 0, #050712 60%);
  border-radius: var(--sf-radius-lg);
  padding: 1.9rem 1.7rem;
  border: 1px solid var(--sf-border-subtle);
  box-shadow: var(--sf-shadow-soft);
}

.sf-join-panel h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.sf-join-note {
  font-size: 0.85rem;
  color: var(--sf-text-muted);
  margin-top: 0.75rem;
}

/* Widget placeholder */

.sf-widget-card {
  background: var(--sf-surface);
  border-radius: var(--sf-radius-lg);
  border: 1px solid var(--sf-border-subtle);
  padding: 0.75rem;
  box-shadow: var(--sf-shadow-subtle);
}

/* Footer */

.sf-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  background: #020308;
  padding: 1.4rem 0;
}

.sf-footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--sf-text-muted);
}

.sf-footer-brand {
  font-weight: 500;
  color: var(--sf-text);
}

.sf-footer-sub {
  display: block;
  margin-top: 0.15rem;
}

.sf-footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.sf-footer-links a {
  color: var(--sf-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
}

.sf-footer-links a:hover,
.sf-footer-links a:focus-visible {
  color: var(--sf-accent-soft);
}

/* Desktop-specific */

@media (min-width: 900px) {
  .sf-grid-2 {
    align-items: center;
  }
}

/* Responsive */

@media (max-width: 900px) {
  .sf-header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .sf-nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .sf-hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .sf-grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }

  .sf-grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .sf-hero {
    padding-top: 2.5rem;
  }

  .sf-hero-card {
    margin-top: 1.6rem;
  }
}

@media (max-width: 600px) {
  .sf-header-inner {
    padding-inline: 1.1rem;
  }

  .sf-container {
    padding: 0 1.1rem;
  }

  .sf-section {
    padding: 2.4rem 0;
  }

  .sf-hero-card {
    padding: 1.2rem 1.05rem;
  }

  .sf-hero-card-body {
    gap: 0.6rem;
    font-size: 0.82rem;
  }

  .sf-hero-bullets li {
    margin-bottom: 0.25rem;
  }
}