/* ============================================
   Visibility Fuel — Stylesheet
   ============================================ */

:root {
  /* Primary Blues */
  --blue-900: #042C53;
  --blue-700: #0C447C;
  --blue-600: #185FA5;
  --blue-400: #378ADD;
  --blue-200: #85B7EB;
  --blue-100: #B5D4F4;
  --blue-50:  #E6F1FB;

  /* Neutrals */
  --neutral-900: #1A1D23;
  --neutral-700: #3D4451;
  --neutral-500: #6B7280;
  --neutral-300: #9BA3B0;
  --neutral-200: #E8EBF0;
  --neutral-50:  #F5F7FA;
  --white:       #FFFFFF;

  /* Success */
  --success-700: #085041;
  --success-600: #0F6E56;
  --success-400: #1D9E75;
  --success-200: #5DCAA5;
  --success-100: #9FE1CB;
  --success-50:  #E1F5EE;

  /* Warning */
  --warning-700: #633806;
  --warning-600: #854F0B;
  --warning-400: #BA7517;
  --warning-200: #EF9F27;
  --warning-100: #FAC775;
  --warning-50:  #FAEEDA;

  /* Error */
  --error-700: #791F1F;
  --error-600: #A32D2D;
  --error-400: #E24B4A;
  --error-200: #F09595;
  --error-50:  #FCEBEB;
}


/* ---- Reset & Base ---- */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--neutral-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--blue-600);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--blue-400);
}


/* ---- Typography ---- */

h1, h2, h3, h4 {
  font-family: 'Outfit', sans-serif;
  color: var(--blue-900);
  line-height: 1.2;
  font-weight: 700;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}


/* ---- Layout ---- */

.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}


/* ---- Navigation ---- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--neutral-200);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 960px;
}

.site-nav__brand {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--blue-900);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-nav__brand:hover {
  color: var(--blue-700);
}

.site-nav__links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.site-nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--neutral-500);
  transition: color 0.2s ease;
}

.site-nav__links a:hover,
.site-nav__links a.active {
  color: var(--blue-600);
}


/* ---- Hero ---- */

.hero {
  background: var(--blue-50);
  padding: 5rem 0 4.5rem;
  text-align: center;
}

.hero h1 {
  margin-bottom: 1.25rem;
}

.hero p {
  font-size: 1.125rem;
  color: var(--neutral-700);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.8;
}


/* ---- About Section ---- */

.about {
  padding: 4.5rem 0;
  background: var(--white);
}

.about h2 {
  margin-bottom: 1.5rem;
  text-align: center;
}

.about p {
  color: var(--neutral-700);
  font-size: 1.05rem;
  text-align: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}


/* ---- Contact Callout ---- */

.contact {
  padding: 3.5rem 0;
  background: var(--neutral-50);
  text-align: center;
}

.contact h2 {
  margin-bottom: 0.75rem;
}

.contact p {
  color: var(--neutral-500);
  margin-bottom: 1.25rem;
}

.contact a.email-link {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--blue-600);
  border: 2px solid var(--blue-600);
  padding: 0.65rem 1.75rem;
  border-radius: 6px;
  transition: background 0.2s ease, color 0.2s ease;
}

.contact a.email-link:hover {
  background: var(--blue-600);
  color: var(--white);
}


/* ---- Footer ---- */

.site-footer {
  background: var(--blue-900);
  color: var(--blue-200);
  padding: 3rem 0;
}

.site-footer .container {
  max-width: 960px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.site-footer__links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.site-footer__links a {
  color: var(--blue-200);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.site-footer__links a:hover {
  color: var(--white);
}

.site-footer__copy {
  font-size: 0.8rem;
  color: var(--neutral-300);
}


/* ---- Legal Pages ---- */

.legal {
  padding: 4rem 0;
  background: var(--white);
}

.legal h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.5rem;
}

.legal .effective-date {
  color: var(--neutral-500);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
}

.legal h2 {
  font-size: 1.25rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.legal p,
.legal li {
  color: var(--neutral-700);
  font-size: 0.975rem;
  line-height: 1.75;
}

.legal ul,
.legal ol {
  margin: 0.75rem 0 1rem 1.5rem;
}

.legal li {
  margin-bottom: 0.4rem;
}

.legal a {
  color: var(--blue-600);
}


/* ---- Responsive ---- */

@media (max-width: 600px) {
  .site-nav .container {
    flex-direction: column;
    height: auto;
    padding: 0.75rem 1.5rem;
    gap: 0.5rem;
  }

  .site-nav__links {
    gap: 1.25rem;
  }

  .hero {
    padding: 3.5rem 0 3rem;
  }

  .about {
    padding: 3rem 0;
  }

  .contact {
    padding: 2.5rem 0;
  }

  .site-footer {
    padding: 2rem 0;
  }
}