/* Layout — Header, Footer, Navigation, Grid */

/* ============================================
   HEADER
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-header);
  transition: height var(--transition-base),
              background-color var(--transition-base),
              box-shadow var(--transition-base);
  display: flex;
  align-items: center;
}

.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(253, 251, 247, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.header--scrolled {
  height: var(--header-height-scrolled);
  box-shadow: var(--shadow-sm);
}

.header--scrolled::before {
  opacity: 1;
}

.header__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.header__logo {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.6rem);
  color: var(--color-deep-blue);
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.header__logo:hover {
  color: var(--color-terracotta);
}

.header__logo span {
  color: var(--color-terracotta);
}

/* Desktop Navigation */
.nav {
  display: none;
  align-items: center;
  gap: var(--space-md);
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-charcoal);
  position: relative;
  padding-block: var(--space-xs);
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-terracotta);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__link:hover {
  color: var(--color-terracotta);
}

.nav__link--active {
  color: var(--color-terracotta);
}

.nav__cta {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-warm-white);
  background-color: var(--color-terracotta);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast),
              transform var(--transition-fast);
}

.nav__cta:hover {
  background-color: var(--color-terracotta-dark);
  color: var(--color-warm-white);
  transform: translateY(-1px);
}

@media (min-width: 900px) {
  .nav {
    display: flex;
  }

  .hamburger {
    display: none;
  }
}

/* ============================================
   HAMBURGER BUTTON
   ============================================ */

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 6px;
  z-index: calc(var(--z-overlay) + 1);
  position: relative;
}

.hamburger__line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-deep-blue);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base),
              opacity var(--transition-fast);
  transform-origin: center;
}

.hamburger--open .hamburger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger--open .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger--open .hamburger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ============================================
   MOBILE MENU OVERLAY
   ============================================ */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background-color: var(--color-warm-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow),
              visibility var(--transition-slow);
}

.mobile-menu--open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  color: var(--color-deep-blue);
  transform: translateY(20px);
  opacity: 0;
  transition: transform var(--transition-base),
              opacity var(--transition-base),
              color var(--transition-fast);
}

.mobile-menu--open .mobile-menu__link {
  transform: translateY(0);
  opacity: 1;
}

/* Staggered entrance */
.mobile-menu--open .mobile-menu__link:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu--open .mobile-menu__link:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu--open .mobile-menu__link:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu--open .mobile-menu__link:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu--open .mobile-menu__link:nth-child(5) { transition-delay: 0.25s; }
.mobile-menu--open .mobile-menu__link:nth-child(6) { transition-delay: 0.3s; }
.mobile-menu--open .mobile-menu__link:nth-child(7) { transition-delay: 0.35s; }
.mobile-menu--open .mobile-menu__link:nth-child(8) { transition-delay: 0.4s; }
.mobile-menu--open .mobile-menu__link:nth-child(9) { transition-delay: 0.45s; }

.mobile-menu__link:hover {
  color: var(--color-terracotta);
}

.mobile-menu__link--active {
  color: var(--color-terracotta);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background-color: var(--color-deep-blue);
  color: var(--color-warm-white);
  padding-block: var(--space-xl) var(--space-lg);
  position: relative;
}

/* Grain overlay on footer */
.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.footer__inner {
  position: relative;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 600px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .footer__inner {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer__brand {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  margin-bottom: var(--space-sm);
}

.footer__brand span {
  color: var(--color-gold);
}

.footer__tagline {
  font-size: var(--fs-small);
  color: rgba(253, 251, 247, 0.6);
  line-height: 1.6;
  max-width: 35ch;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer__link {
  font-size: var(--fs-small);
  color: rgba(253, 251, 247, 0.75);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-warm-white);
}

.footer__contact-item {
  font-size: var(--fs-small);
  color: rgba(253, 251, 247, 0.75);
  margin-bottom: var(--space-xs);
}

.footer__divider {
  grid-column: 1 / -1;
  border: none;
  border-top: 1px solid rgba(253, 251, 247, 0.1);
  margin-block: var(--space-sm);
}

.footer__bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-label);
  color: rgba(253, 251, 247, 0.4);
}

.footer__legal {
  display: flex;
  gap: var(--space-sm);
}

.footer__legal a {
  color: rgba(253, 251, 247, 0.4);
  transition: color var(--transition-fast);
}

.footer__legal a:hover {
  color: rgba(253, 251, 247, 0.8);
}

/* ============================================
   PAGE LAYOUT
   ============================================ */

.page {
  padding-top: var(--header-height);
}

/* ============================================
   GRID HELPERS
   ============================================ */

.grid {
  display: grid;
  gap: var(--space-md);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

.grid--4 {
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1200px) {
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* Two-column asymmetric layout */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

@media (min-width: 900px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }

  .split--wide-left {
    grid-template-columns: 1.3fr 0.7fr;
  }

  .split--wide-right {
    grid-template-columns: 0.7fr 1.3fr;
  }

  .split--reverse > :first-child {
    order: 2;
  }

  .split--reverse > :last-child {
    order: 1;
  }
}