/* ==========================================================================
   GECM Consulting - Header Component (BEM)
   ========================================================================== */

/* ── Block ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: var(--z-header);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header--transparent {
  background-color: transparent;
}

.header--solid {
  background-color: var(--color-white);
  box-shadow: var(--shadow-lg);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ── Logo ── */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  z-index: calc(var(--z-header) + 1);
}

.header__logo-img {
  height: 40px;
  width: auto;
}

/* Logo visibility toggle: transparent = light, solid = dark */
.header--transparent .header__logo-img--light { display: block; }
.header--transparent .header__logo-img--dark { display: none; }
.header--solid .header__logo-img--light { display: none; }
.header--solid .header__logo-img--dark { display: block; }

/* ── Navigation ── */
.header__nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
  z-index: var(--z-header);
}

.header__nav--open {
  transform: translateX(0);
}

.header__nav-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
}

/* ── Nav Links — Default (transparent header / mobile menu) ── */
.header__nav-link {
  font-family: var(--font-primary);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--color-white);
  position: relative;
  transition: color var(--transition-fast);
  letter-spacing: var(--ls-wide);
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

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

.header__nav-link--active {
  color: var(--color-accent);
}

/* ── Actions ── */
.header__actions {
  display: none;
}

/* ── Hamburger ── */
.header__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: calc(var(--z-header) + 1);
  cursor: pointer;
  background: none;
  border: none;
}

.header__hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

/* Solid header → hamburger lines turn dark */
.header--solid .header__hamburger-line {
  background-color: var(--color-primary);
}

.header__hamburger--active .header__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger--active .header__hamburger-line:nth-child(2) {
  opacity: 0;
}

.header__hamburger--active .header__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* When hamburger is active (menu open), lines stay white regardless of header state */
.header__hamburger--active .header__hamburger-line {
  background-color: var(--color-white);
}

/* ── Desktop ── */
@media (min-width: 768px) {
  .header__nav {
    position: static;
    width: auto;
    height: auto;
    background-color: transparent;
    transform: none;
    flex-direction: row;
  }

  .header__nav-list {
    flex-direction: row;
    gap: var(--space-lg);
  }

  .header__nav-link {
    font-size: var(--fs-sm);
    letter-spacing: var(--ls-normal);
  }

  /* Solid header → nav links turn dark blue */
  .header--solid .header__nav-link {
    color: var(--color-primary);
  }

  .header--solid .header__nav-link:hover {
    color: var(--color-accent);
  }

  .header--solid .header__nav-link--active {
    color: var(--color-accent);
  }

  .header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }

  .header__hamburger {
    display: none;
  }
}

/* ── Action Buttons ── */
.header__btn {
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.header__btn--whatsapp {
  color: var(--color-white);
  background: transparent;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
}

.header__btn--whatsapp:hover {
  opacity: 0.85;
}

/* Solid header → WhatsApp turns green */
.header--solid .header__btn--whatsapp {
  color: #25D366;
}

.header__btn-icon {
  width: 18px;
  height: 18px;
}

/* ── Mobile WhatsApp icon ── */
.header__wa-mobile {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  z-index: calc(var(--z-header) + 1);
  transition: color var(--transition-fast);
  flex-shrink: 0;
}

.header__wa-mobile svg {
  width: 24px;
  height: 24px;
}

/* Solid header → mobile icon turns green */
.header--solid .header__wa-mobile {
  color: #25D366;
}

/* Hide on desktop */
@media (min-width: 768px) {
  .header__wa-mobile {
    display: none;
  }
}

.header__btn--cta {
  color: var(--color-white);
  background-color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.header__btn--cta:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}