/* ═══════════════════════════════════════════════════════════
   HEADER / NAVBAR — Premium Minimal
   ═══════════════════════════════════════════════════════════ */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

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

/* ─── Logo ───────────────────────────────────────────── */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.header__logo:hover {
  opacity: 0.85;
}

.header__logo-icon {
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.125rem;
  font-weight: var(--fw-bold);
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--color-text-primary);
  letter-spacing: var(--ls-tight);
}

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

/* ─── Navigation ─────────────────────────────────────── */
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.header__nav-link {
  padding: 8px 16px;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.header__nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.header__nav-link--active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  font-weight: var(--fw-semibold);
}

/* ─── Mobile Menu Toggle ─────────────────────────────── */
.header__menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.header__menu-toggle:hover {
  background-color: var(--color-primary-light);
}

.header__menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-primary);
  position: relative;
  transition: all var(--transition-normal);
}

.header__menu-toggle span::before,
.header__menu-toggle span::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  left: 0;
  transition: all var(--transition-normal);
}

.header__menu-toggle span::before { top: -7px; }
.header__menu-toggle span::after { top: 7px; }

/* Active hamburger */
.header__menu-toggle--active span {
  background-color: transparent;
}

.header__menu-toggle--active span::before {
  transform: rotate(45deg);
  top: 0;
}

.header__menu-toggle--active span::after {
  transform: rotate(-45deg);
  top: 0;
}

/* ─── Mobile Responsive ──────────────────────────────── */
@media (max-width: 768px) {
  .header__menu-toggle {
    display: flex;
  }

  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-xs);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .header__nav--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .header__nav-link {
    width: 100%;
    padding: 14px 16px;
    font-size: var(--fs-body);
  }
}