.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: clamp(16px, 2.5vw, 28px) clamp(18px, 4vw, 54px);
  pointer-events: none;
}

.site-header > * {
  pointer-events: auto;
}

/* Estado transparente no topo → sólido após scroll (§12).
   Adaptado ao fundo da seção sob o header. */
.site-header {
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--motion-header) var(--ease-calone),
    border-color var(--motion-header) var(--ease-calone),
    backdrop-filter var(--motion-header) var(--ease-calone);
}

.site-header.is-scrolled {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.site-header.is-scrolled.site-header--on-light {
  background: rgba(255, 255, 255, 0.72);
  border-bottom-color: rgba(0, 0, 0, 0.1);
}

.site-header__brand {
  position: relative;
  display: inline-flex;
  width: clamp(110px, 12vw, 160px);
  flex: none;
}

.site-header__logo {
  display: block;
  width: 100%;
  height: auto;
  transition: opacity var(--motion-header) var(--ease-calone);
}

.site-header__logo--black {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.site-header--on-light .site-header__logo--white {
  opacity: 0;
}

.site-header--on-light .site-header__logo--black {
  opacity: 1;
}

.site-header__pill {
  display: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  /* Cápsula central (§12) */
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 8px;
  align-items: center;
  gap: 4px;
  transition: background-color var(--motion-header) var(--ease-calone),
    border-color var(--motion-header) var(--ease-calone);
}
@media (min-width: 1100px) {
  .site-header__pill { display: flex; }
}

.site-header--on-light .site-header__pill {
  background: rgba(0, 0, 0, 0.06);
  border-color: rgba(0, 0, 0, 0.12);
}

.site-header__link {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 999px;
  font-family: var(--calone-font-sans);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background-color var(--motion-standard) var(--ease-calone), color var(--motion-standard) var(--ease-calone);
}
.site-header__link:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}
.site-header__link.is-active {
  color: #fff;
}

.site-header--on-light .site-header__link {
  color: rgba(0, 0, 0, 0.6);
}
.site-header--on-light .site-header__link:hover {
  background: rgba(0, 0, 0, 0.08);
  color: #000;
}
.site-header--on-light .site-header__link.is-active {
  color: #000;
}

.site-header__signup {
  display: none;
  background: #fff;
  color: var(--calone-black);
  font-family: var(--calone-font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  min-height: 44px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: background-color var(--motion-standard) var(--ease-calone), color var(--motion-header) var(--ease-calone);
}
@media (min-width: 1100px) {
  .site-header__signup { display: block; }
}
.site-header__signup:hover {
  background: var(--calone-silver);
}

.site-header--on-light .site-header__signup {
  background: var(--calone-black);
  color: #fff;
}
.site-header--on-light .site-header__signup:hover {
  background: #000;
}

.site-header__burger {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
}
@media (min-width: 1100px) {
  .site-header__burger { display: none; }
}
.site-header__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  transition: background-color var(--motion-header) var(--ease-calone);
}
.site-header__burger span:last-child {
  width: 14px;
}

.site-header--on-light .site-header__burger span {
  background: #000;
}

.site-menu {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: var(--calone-black);
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--motion-standard) var(--ease-calone);
}
.site-menu.is-open {
  opacity: 1;
  pointer-events: auto;
}

html.is-menu-locked,
html.is-menu-locked body {
  overflow: hidden;
  overscroll-behavior: none;
}
.site-menu__close {
  align-self: flex-end;
  margin: 20px;
  width: 40px;
  height: 40px;
  position: relative;
  background: transparent;
  border: none;
  cursor: pointer;
}
.site-menu__close span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 2px;
  background: #fff;
}
.site-menu__close span:first-child {
  transform: translate(-50%, -50%) rotate(45deg);
}
.site-menu__close span:last-child {
  transform: translate(-50%, -50%) rotate(-45deg);
}
.site-menu__links {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}
.site-menu__links button {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--calone-font-sans);
  font-size: 28px;
  font-weight: 500;
  cursor: pointer;
}
.site-menu__links button.is-active {
  color: #fff;
}
.site-menu__signup {
  margin: 0 auto 48px;
  background: #fff;
  color: var(--calone-black);
  font-family: var(--calone-font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  min-height: 44px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
}