/*
static/css/site.css

Define BuiFund's shared visual identity and public-site presentation.
*/

:root {
  --buifund-content-width: 72rem;
  --buifund-radius-lg: 1.5rem;
  --buifund-muted-border: rgba(0, 0, 0, 0.1);
  --buifund-surface: rgba(255, 255, 255, 0.82);
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  background:
    radial-gradient(
      circle at 90% 5%,
      rgba(13, 110, 253, 0.08),
      transparent 28rem
    ),
    var(--bs-body-bg);
}

.container {
  max-width: var(--buifund-content-width);
}

.py-lg-6 {
  padding-top: 7rem;
  padding-bottom: 7rem;
}

.tracking-tight {
  letter-spacing: -0.045em;
}

.landing-lead {
  max-width: 42rem;
  line-height: 1.7;
}

.landing-section-heading {
  max-width: 44rem;
}

.navbar-brand {
  letter-spacing: -0.025em;
}

.navbar-brand i {
  font-size: 1.1rem;
}

.landing-system-card {
  overflow: hidden;
  border: 1px solid var(--buifund-muted-border);
  border-radius: var(--buifund-radius-lg);
  background: var(--buifund-surface);
  backdrop-filter: blur(1rem);
}

.landing-system-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--buifund-muted-border);
}

.landing-system-header i {
  color: var(--bs-success);
}

.landing-system-flow {
  padding: 1.5rem;
}

.landing-flow-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--buifund-muted-border);
  border-radius: 1rem;
  background: var(--bs-body-bg);
}

.landing-flow-icon {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.8rem;
  background: var(--bs-tertiary-bg);
}

.landing-flow-arrow {
  padding: 0.65rem 0;
  text-align: center;
  color: var(--bs-secondary-color);
}

#principles article {
  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
}

#principles article:hover {
  transform: translateY(-0.2rem);
  box-shadow: var(--bs-box-shadow-sm);
}

footer {
  margin-top: auto;
}

@media (max-width: 991.98px) {
  .py-lg-6 {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .tracking-tight {
    letter-spacing: -0.035em;
  }
}

@media (max-width: 575.98px) {
  .display-3 {
    font-size: calc(2.2rem + 1.5vw);
  }

  .landing-system-flow {
    padding: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  #principles article {
    transition: none;
  }

  #principles article:hover {
    transform: none;
  }
}