/* ===================================================================
   LAYOUT
   Header/navigation, main content container, and footer scaffolding.
   Navigation is mobile-first: a horizontally-scrolling "horizon line"
   strip on small screens, a standard row from the md breakpoint up.
   No JS is used — this stays pure CSS.
   =================================================================== */

/* ---- Reusable container ---- */
main > *:not(img),
.site-container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

main {
  display: block;
  overflow-x: clip;
}

/* ---- Header ---- */
header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(246, 243, 234, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-default);
}

header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-width: 0;
  overflow: hidden;
  max-width: var(--container-width);
  margin-inline: auto;
  padding: var(--space-2) var(--container-padding);
}

.menu-toggle {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  border-radius: 50%;
  border: 1px solid rgba(11, 49, 66, 0.24);
  background-color: rgba(255, 255, 255, 0.7);
  color: var(--color-navy);
  z-index: calc(var(--z-overlay) + 1);
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 99px;
  background-color: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

body.menu-open .menu-toggle span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

body.menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

body.menu-open .menu-toggle span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

header h1 {
  font-size: var(--fs-lg);
  color: var(--color-navy);
  white-space: nowrap;
  position: relative;
  padding-left: var(--space-3);
}

/* Small compass-mark before the wordmark — a quiet nautical signature */
/* header h1::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  translate: 0 -50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
} */

header nav ul {
  display: flex;
  flex: 1;
  min-width: 0;
  justify-content: flex-end;
  gap: var(--space-3);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x proximity;
  mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 24px), transparent);
}

@media (max-width: 899px) {
  html.menu-open,
  body.menu-open {
    overflow: hidden;
    overscroll-behavior: none;
    height: 100dvh;
  }

  .site-nav-list {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    z-index: var(--z-overlay);
    padding: calc(var(--space-6) + 24px) var(--container-padding) var(--space-5);
    background:
      radial-gradient(circle at 100% 0%, rgba(201, 151, 63, 0.22), transparent 40%),
      linear-gradient(155deg, rgba(11, 49, 66, 0.98), rgba(19, 58, 77, 0.97));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-3);
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    touch-action: pan-y;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    scrollbar-width: thin;
    mask-image: none;
  }

  body.menu-open .site-nav-list {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav-list li {
    width: 100%;
    max-width: 560px;
    text-align: center;
  }

  .site-nav-list li a {
    display: block;
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: clamp(1.2rem, 1.05rem + 1.2vw, 1.8rem);
    font-family: var(--font-display);
    color: var(--color-canvas);
    letter-spacing: 0.02em;
    border-bottom: 1px solid rgba(246, 243, 234, 0.16);
  }

  .site-nav-list li a::after {
    display: none;
  }
}

header nav ul::-webkit-scrollbar {
  display: none;
}

header nav ul li {
  flex-shrink: 0;
  scroll-snap-align: start;
}

header nav ul li a {
  display: inline-block;
  padding-block: var(--space-1);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy);
  white-space: nowrap;
  position: relative;
}

/* Underline that draws in on hover, like a taut line */
header nav ul li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

header nav ul li a:hover {
  color: var(--color-primary);
}

header nav ul li a:hover::after {
  transform: scaleX(1);
}

@media (min-width: 900px) {
  .menu-toggle {
    display: none;
  }

  header nav ul {
    position: static;
    inset: auto;
    width: auto;
    height: auto;
    flex-direction: row;
    justify-content: flex-end;
    align-items: center;
    padding: 0;
    background: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    overflow-x: visible;
    mask-image: none;
    gap: var(--space-4);
  }
}

/* ---- Footer ---- */
footer {
  background-color: var(--color-navy);
  color: var(--color-text-on-dark);
  margin-top: var(--space-7);
  position: relative;
}

/* Wave seam between page content and footer */
footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 28px;
  background-color: var(--color-navy);
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 28' preserveAspectRatio='none'%3E%3Cpath d='M0 14 Q 50 0 100 14 T 200 14 T 300 14 T 400 14 T 500 14 T 600 14 T 700 14 T 800 14 T 900 14 T 1000 14 T 1100 14 T 1200 14 V28 H0 Z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 28' preserveAspectRatio='none'%3E%3Cpath d='M0 14 Q 50 0 100 14 T 200 14 T 300 14 T 400 14 T 500 14 T 600 14 T 700 14 T 800 14 T 900 14 T 1000 14 T 1100 14 T 1200 14 V28 H0 Z'/%3E%3C/svg%3E");
  -webkit-mask-size: 100% 100%;
  mask-size: 100% 100%;
  transform: translateY(-100%);
}

footer > nav,
footer > .footer-social-links,
footer > .copyright-text {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

footer {
  display: grid;
  grid-template-columns: 1fr;
  padding-block: var(--space-6) var(--space-3);
  gap: var(--space-4);
}

footer h4 {
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

footer ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

footer nav ul li a {
  color: var(--color-teal-pale);
  font-size: var(--fs-sm);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

footer nav ul li a:hover {
  color: var(--color-foam);
  padding-left: var(--space-1);
}

.footer-social-links {
  display: flex;
  gap: var(--space-2);
}

.footer-social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(246, 243, 234, 0.25);
  color: var(--color-foam);
  transition: background-color var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.footer-social-links a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-navy);
  transform: translateY(-3px);
}

.copyright-text {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: rgba(246, 243, 234, 0.6);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(246, 243, 234, 0.15);
}

@media (max-width: 899px) {
  footer {
    justify-items: center;
    gap: var(--space-5);
  }

  footer > nav,
  footer > .footer-social-links,
  footer > .copyright-text {
    width: min(100%, 40rem);
  }

  footer nav ul {
    align-items: center;
    text-align: center;
    gap: var(--space-2);
  }

  footer nav ul li {
    width: 100%;
  }

  footer nav ul li a {
    display: inline-block;
    max-width: 100%;
    line-height: 1.45;
    text-wrap: balance;
  }

  .footer-social-links {
    justify-content: center;
  }

  .copyright-text {
    text-align: center;
  }
}

@media (min-width: 900px) {
  footer {
    grid-template-columns: 1.2fr 1fr auto;
    align-items: start;
  }

  .footer-social-links {
    justify-self: end;
  }

  .copyright-text {
    grid-column: 1 / -1;
  }
}