/**
 * ELIO SOLAR - HEADER CORE STYLES
 * Main header component styles with CSS custom properties
 * Version: 2.0
 */

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */

:root {
  /* Header Dimensions */
  --header-height: 80px;
  --header-height-scrolled: 70px;
  --header-height-mobile: 60px;
  --header-padding-x: 32px;
  --header-padding-x-mobile: 20px;
  --header-container-max-width: 1400px;

  /* Header Colors - Default State (top of page) */
  --header-bg-default: rgba(30, 58, 138, 0.95);
  --header-text-default: #ffffff;
  --header-border-default: rgba(255, 255, 255, 0.1);

  /* Header Colors - Scrolled State */
  --header-bg-scrolled: rgba(255, 255, 255, 0.98);
  --header-text-scrolled: #1f2937;
  --header-border-scrolled: rgba(226, 232, 240, 0.8);
  --header-shadow-scrolled: 0 2px 24px rgba(0, 0, 0, 0.06);

  /* Header Effects */
  --header-blur: 12px;
  --header-blur-scrolled: 16px;
  --header-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Logo */
  --logo-height-desktop: 60px;
  --logo-height-desktop-scrolled: 50px;
  --logo-height-mobile: 45px;
  --logo-transition: all 0.3s ease;

  /* Z-index layers */
  --z-header: 1000;
  --z-mobile-menu: 1100;
  --z-mega-menu: 1050;
}

/* ============================================
   HEADER BASE STRUCTURE
   ============================================ */

/* Body padding to prevent content from hiding under fixed header */
body {
  padding-top: var(--header-height) !important;
}

@media (max-width: 1023px) {
  body {
    padding-top: var(--header-height-mobile) !important;
  }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: var(--header-height);
  background: var(--header-bg-default);
  color: var(--header-text-default);
  border-bottom: 1px solid var(--header-border-default);
  backdrop-filter: blur(var(--header-blur));
  -webkit-backdrop-filter: blur(var(--header-blur));
  transition: var(--header-transition);
  z-index: var(--z-header);
  will-change: height, background-color, backdrop-filter;
}

/* Scrolled state */
.site-header[data-header-scrolled="true"] {
  height: var(--header-height-scrolled);
  background: var(--header-bg-scrolled);
  color: var(--header-text-scrolled);
  border-bottom-color: var(--header-border-scrolled);
  backdrop-filter: blur(var(--header-blur-scrolled)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--header-blur-scrolled)) saturate(180%);
  box-shadow: var(--header-shadow-scrolled);
}

/* Header container */
.header-container {
  max-width: var(--header-container-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--header-padding-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

/* ============================================
   LOGO SECTION
   ============================================ */

.header-logo {
  flex-shrink: 0;
  transition: var(--logo-transition);
}

.header-logo a {
  display: inline-block;
  text-decoration: none;
  transition: transform 0.3s ease;
  position: relative;
}

.header-logo a:hover {
  transform: scale(1.05);
}

.header-logo a:focus {
  outline: 2px solid currentColor;
  outline-offset: 4px;
  border-radius: 4px;
}

.header-logo img {
  height: var(--logo-height-desktop) !important;
  width: auto !important;
  display: block;
  max-height: var(--logo-height-desktop) !important;
  transition: var(--logo-transition);
}

/* Logo image - src will be swapped via JavaScript */
.header-logo-img {
  display: block;
}

/* Logo size when scrolled */
.site-header[data-header-scrolled="true"] .header-logo img {
  height: var(--logo-height-desktop-scrolled) !important;
  max-height: var(--logo-height-desktop-scrolled) !important;
}

/* ============================================
   ACTIONS SECTION (Trust Badge + CTA)
   ============================================ */

.header-actions {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ============================================
   MOBILE TOGGLE BUTTON (Hamburger)
   ============================================ */

.mobile-toggle {
  display: none; /* Hidden on desktop */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: transform 0.3s ease;
  border-radius: 8px;
}

.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.mobile-toggle:focus {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

.mobile-toggle:active {
  transform: scale(0.95);
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Hamburger animation when menu is open */
.mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: translateX(-20px);
}

.mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */

@media (max-width: 1200px) {
  :root {
    --header-padding-x: 24px;
  }

  .header-container {
    gap: 32px;
  }

  .header-actions {
    gap: 16px;
  }
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */

@media (max-width: 1023px) {
  :root {
    --header-height: 64px;
    --header-height-scrolled: 64px;
    --header-padding-x: 20px;
  }

  .header-container {
    gap: 16px;
  }

  .header-logo img {
    height: var(--logo-height-mobile) !important;
    max-height: var(--logo-height-mobile) !important;
  }

  .site-header[data-header-scrolled="true"] .header-logo img {
    height: var(--logo-height-mobile) !important;
    max-height: var(--logo-height-mobile) !important;
  }


  .mobile-toggle {
    display: flex;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .site-header {
    position: relative;
    box-shadow: none;
    border-bottom: 1px solid #000;
  }

  .mobile-toggle,
  .header-actions {
    display: none;
  }
}

/* ============================================
   REDUCED MOTION SUPPORT
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .header-logo,
  .header-logo a,
  .header-logo img,
  .mobile-toggle,
  .hamburger-line {
    transition: none !important;
    animation: none !important;
  }
}