/* =========================================================
   SULVEO — 5. Header & Navigation
   ========================================================= */

.header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  padding-block: 1rem;
  border-bottom: 1px solid transparent;
  transition: .5s;
}
.header.scrolled {
  background: rgb(var(--ink-rgb) / .9);
  backdrop-filter: blur(12px);
  border-color: rgb(var(--line-rgb) / .7);
  padding-block: .5rem;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.header__actions {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.header__wa, .header__quote, .lang, .nav {
  display: none;
}

/* Brand Logo & Name */
.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.brand__logo {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: .85rem;
  overflow: hidden;
  background: var(--ink);
  box-shadow: 0 0 0 1px rgb(var(--bronze-rgb) / .4), 0 4px 16px rgb(0 0 0 / .35);
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand__logo--lg {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 1rem;
  box-shadow: 0 0 0 1px rgb(var(--bronze-rgb) / .45), 0 6px 20px rgb(0 0 0 / .4);
}
.brand__logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.brand__name {
  display: block;
  font-family: var(--font-num);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: .35em;
  line-height: 1;
  color: var(--bronze-lt);
  background: linear-gradient(120deg, #f2c79f 0%, #e9b285 35%, #c5814f 75%, #9c5c2d 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: filter .3s;
}
.brand:hover .brand__name {
  filter: brightness(1.2);
}
.brand__name--lg { font-size: 1.35rem; }
.brand__name-inline {
  color: var(--bronze-lt);
  font-family: var(--font-num);
  font-weight: 700;
  letter-spacing: .08em;
}

/* Desktop Nav Links */
.nav {
  align-items: center;
  gap: 1.75rem;
}
.nav a {
  position: relative;
  font-size: .875rem;
  color: var(--sand);
  transition: color .3s;
}
.nav a::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -6px;
  height: 1px;
  background: var(--bronze);
  transform: scaleX(0);
  transition: transform .3s;
}
.nav a:hover { color: var(--cream); }
.nav a:hover::after { transform: scaleX(1); }

/* Language Switcher */
.lang {
  align-items: center;
  border: 1px solid var(--line);
  background: rgb(var(--coal-rgb) / .6);
  border-radius: 999px;
  padding: 2px;
}
.lang button {
  border-radius: 999px;
  padding: .375rem .75rem;
  font-size: .6875rem;
  font-weight: 700;
  color: var(--sand);
  transition: .3s;
}
.lang button:hover { color: var(--cream); }
.lang button[aria-pressed="true"] {
  background: var(--bronze);
  color: var(--ink);
}

/* Mobile Burger */
.burger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: .75rem;
  border: 1px solid var(--line);
  background: rgb(var(--coal-rgb) / .7);
}
.burger span {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--cream);
  transition: transform .3s, opacity .3s;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  background: rgb(var(--ink-rgb) / .95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: max-height .5s, opacity .5s;
}
.mobile-menu.open { max-height: 26rem; opacity: 1; }
.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: 1rem 1.5rem;
}
.mobile-menu__nav > a:not(.btn) {
  padding-block: .625rem;
  color: var(--sand);
  border-bottom: 1px solid rgb(var(--line-rgb) / .4);
  transition: color .3s;
}
.mobile-menu__nav > a:not(.btn):hover { color: var(--bronze); }
.mobile-menu__lang {
  margin-top: .75rem;
  display: flex;
  gap: .75rem;
}
.mobile-menu__lang button {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .5rem 1rem;
  font-size: .875rem;
  font-weight: 700;
  color: var(--sand);
  transition: .3s;
}
.mobile-menu__lang button[aria-pressed="true"] {
  background: var(--bronze);
  border-color: var(--bronze);
  color: var(--ink);
}
.mobile-menu .btn { margin-top: .75rem; }

/* Breakpoint visibility */
@media (min-width: 640px) {
  .lang { display: flex; }
  .header__wa { display: inline-flex; }
}
@media (min-width: 768px) {
  .header__quote { display: inline-flex; }
}
@media (min-width: 1024px) {
  .nav { display: flex; }
  .burger, .mobile-menu { display: none; }
}