/* ==========================================================================
   Parklane — Reusable components
   Buttons, links, site header, mobile menu.
   ========================================================================== */

/* Button -------------------------------------------------------------------
   Transparent, thin brass border, ivory text. Hover: slight green shift,
   arrow moves 4px. No fills, no glow, no bounce.                         */

.btn {
  --btn-bg: transparent;
  display: inline-flex;
  align-items: center;
  gap: var(--s-4);
  min-height: 52px;
  padding: 0 var(--s-6);
  border: 1px solid var(--c-brass-line);
  background: var(--btn-bg);
  color: var(--c-ivory);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: var(--tracking-nav);
  text-transform: uppercase;
  white-space: nowrap;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.btn:hover {
  --btn-bg: rgba(6, 74, 18, 0.42);
  border-color: var(--c-brass);
}

.btn__arrow {
  width: 18px;
  height: 10px;
  flex: none;
  transition: transform var(--dur) var(--ease);
}

.btn:hover .btn__arrow,
.btn:focus-visible .btn__arrow {
  transform: translateX(4px);
}

.btn--sm {
  min-height: 42px;
  padding: 0 var(--s-5);
  font-size: 0.6875rem;
}

/* On light sections */
.btn--dark {
  color: var(--c-obsidian);
  border-color: rgba(102, 83, 59, 0.6);
}

.btn--dark:hover {
  --btn-bg: var(--c-obsidian);
  color: var(--c-ivory);
  border-color: var(--c-obsidian);
}

/* Text link with soft line expansion */
.link-line {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  padding-bottom: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: var(--tracking-nav);
  text-transform: uppercase;
}

.link-line::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 2rem;
  height: 1px;
  background: var(--c-brass);
  transition: width var(--dur) var(--ease);
}

.link-line:hover::after,
.link-line:focus-visible::after {
  width: 100%;
}

/* Site header -------------------------------------------------------------- */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: var(--c-obsidian);
  border-bottom-color: var(--c-hairline-dark);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-4);
  justify-self: start;
  color: var(--c-ivory);
}

.brand__mark {
  width: 52px;
  height: auto;
}

.brand__word {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand__name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.brand__sub {
  margin-top: 6px;
  font-size: 0.5625rem;
  font-weight: 500;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--c-ivory-muted);
}

.nav-primary__list {
  display: flex;
  gap: clamp(1.75rem, 1rem + 2vw, 3.25rem);
}

.nav-primary__link {
  position: relative;
  display: inline-block;
  padding: var(--s-2) 0;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: var(--tracking-nav);
  text-transform: uppercase;
  color: var(--c-ivory-muted);
  transition: color var(--dur) var(--ease);
}

.nav-primary__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--c-brass);
  transition:
    width var(--dur) var(--ease),
    left var(--dur) var(--ease);
}

.nav-primary__link:hover,
.nav-primary__link:focus-visible {
  color: var(--c-ivory);
}

.nav-primary__link:hover::after,
.nav-primary__link:focus-visible::after {
  left: 0;
  width: 100%;
}

.site-header__cta {
  justify-self: end;
}

.menu-toggle {
  display: none;
  justify-self: end;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: flex-end;
}

.menu-toggle__bars {
  position: relative;
  width: 24px;
  height: 8px;
}

.menu-toggle__bars::before,
.menu-toggle__bars::after {
  content: "";
  position: absolute;
  right: 0;
  height: 1px;
  background: var(--c-ivory);
  transition:
    transform var(--dur) var(--ease),
    width var(--dur) var(--ease),
    top var(--dur) var(--ease);
}

.menu-toggle__bars::before {
  top: 0;
  width: 24px;
}

.menu-toggle__bars::after {
  top: 7px;
  width: 16px;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bars::before {
  top: 4px;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bars::after {
  top: 4px;
  width: 24px;
  transform: rotate(-45deg);
}

/* Mobile menu panel */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  padding: calc(var(--header-h) + var(--s-7)) var(--gutter) var(--s-7);
  background: var(--c-obsidian);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--dur) var(--ease),
    visibility 0s linear var(--dur);
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transition:
    opacity var(--dur) var(--ease),
    visibility 0s;
}

.mobile-menu__list {
  border-top: 1px solid var(--c-hairline-dark);
}

.mobile-menu__list li {
  border-bottom: 1px solid var(--c-hairline-dark);
}

.mobile-menu__link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--s-5) 0;
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.1;
}

.mobile-menu__link span {
  font-family: var(--font-sans);
  font-size: var(--fs-label);
  letter-spacing: var(--tracking-label);
  color: var(--c-brass);
}

.mobile-menu__footer {
  margin-top: auto;
  padding-top: var(--s-7);
}

.mobile-menu__footer .btn {
  width: 100%;
  justify-content: space-between;
}

@media (max-width: 1024px) {
  .site-header__inner {
    grid-template-columns: 1fr auto;
  }

  .nav-primary,
  .site-header__cta {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .brand__mark {
    width: 44px;
  }
}

@media (max-width: 640px) {
  .brand__mark {
    width: 38px;
  }

  .brand__name {
    font-size: 1.0625rem;
  }

  .brand__sub {
    margin-top: 4px;
    font-size: 0.5rem;
    letter-spacing: 0.36em;
  }
}

@media (min-width: 1025px) {
  .mobile-menu {
    display: none;
  }
}