/* ==========================================================================
   WyciekiPro — Header & Navigation
   Sticky header, mobile hamburger menu, language switcher
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding: var(--space-md) 0;
  padding-top: calc(env(safe-area-inset-top, 0px) + var(--space-md));
  transition: all var(--transition-base);
}

/* Cover the iOS safe-area above the header so page content doesn't bleed through */
.header::before {
  content: '';
  position: absolute;
  top: -100px; /* Extend far above the viewport to cover safe area and potential bounces */
  left: 0;
  right: 0;
  bottom: 0;
  background: transparent;
  z-index: -1;
  transition: all var(--transition-base);
  pointer-events: none;
}

/* Scrolled state — solid background */
.header.scrolled {
  background: hsla(0, 0%, 100%, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  padding: var(--space-md) 0;
  padding-top: calc(env(safe-area-inset-top, 0px) + var(--space-md));
}

.header.scrolled::before {
  background: hsla(0, 0%, 100%, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

/* ── Logo ──────────────────────────────────────────────────────────────── */

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: var(--fw-extrabold);
  color: #fff;
  z-index: var(--z-header);
  transition: color var(--transition-base);
}

.header.scrolled .header__logo {
  color: var(--color-primary);
}

.header__logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 1.1rem;
}

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

/* ── Navigation ────────────────────────────────────────────────────────── */

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

.nav__link {
  padding: 0.5rem 0.9rem;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: hsla(0, 0%, 100%, 0.85);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover {
  color: #fff;
  background: hsla(0, 0%, 100%, 0.1);
}

.header.scrolled .nav__link {
  color: var(--color-text-light);
}

.header.scrolled .nav__link:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

/* ── Header Actions (phone + language) ─────────────────────────────────── */

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

/* ── Language Switcher ─────────────────────────────────────────────────── */

.lang-switch {
  display: flex;
  align-items: center;
  background: hsla(0, 0%, 100%, 0.1);
  border-radius: var(--radius-full);
  padding: 2px;
  border: 1px solid hsla(0, 0%, 100%, 0.15);
}

.header.scrolled .lang-switch {
  background: var(--color-bg-alt);
  border-color: var(--color-border);
}

.lang-switch__btn {
  padding: 0.3rem 0.7rem;
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: hsla(0, 0%, 100%, 0.6);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lang-switch__btn.active {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 2px 8px hsla(195, 85%, 48%, 0.3);
}

.header.scrolled .lang-switch__btn {
  color: var(--color-text-muted);
}

.header.scrolled .lang-switch__btn.active {
  color: #fff;
}

/* ── Phone in header ───────────────────────────────────────────────────── */

.header__phone {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: #fff;
  font-weight: var(--fw-semibold);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.header.scrolled .header__phone {
  color: var(--color-primary);
}

.header__phone-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-cta);
  border-radius: var(--radius-full);
  color: #fff;
  font-size: 0.85rem;
}

/* ── Hamburger (mobile) ────────────────────────────────────────────────── */

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  z-index: var(--z-header);
}

.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.header.scrolled .hamburger span {
  background: var(--color-primary);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Mobile Menu Overlay ───────────────────────────────────────────────── */

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: hsla(210, 75%, 22%, 0.97);
  backdrop-filter: blur(20px);
  z-index: calc(var(--z-header) - 1);
  padding: 100px var(--container-padding) var(--space-2xl);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu .nav__link {
  font-size: var(--text-xl);
  padding: 0.7rem var(--space-xl);
  color: hsla(0, 0%, 100%, 0.9);
  width: 100%;
  max-width: 80%;
  min-width: max-content;
  text-align: center;
}

.mobile-menu .nav__link:hover {
  background: hsla(0, 0%, 100%, 0.1);
}

.mobile-menu__phone {
  margin-top: var(--space-xl);
  width: 100%;
  max-width: 80%;
  min-width: max-content;
}

/* ── Responsive ────────────────────────────────────────────────────────── */

/* Hide phone number text when it starts to squeeze */
@media (max-width: 1200px) {
  .header__phone-number {
    display: none;
  }
}

@media (max-width: 1024px) {
  .nav {
    display: none;
  }

  .header__phone {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}