/* ==========================================================================
   EU ESTUDO EAD - Premium Header & Footer Styles
   Version: 2.0.0

   Features:
   - Sticky header with smooth transitions
   - Animated hamburger menu
   - Premium dropdown navigation
   - Dark mode support
   - Mobile drawer menu
   - Newsletter signup
   - Social icons with hover effects
   - Back to top button
   - WhatsApp floating button
   ========================================================================== */

/* ==========================================================================
   CSS Custom Properties for Header/Footer
   ========================================================================== */
:root {
  /* Header */
  --header-height: 72px;
  --header-height-scrolled: 64px;
  --header-bg: var(--color-white);
  --header-bg-scrolled: rgba(255, 255, 255, 0.98);
  --header-border: var(--color-gray-200);
  --header-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);

  /* Footer */
  --footer-bg: var(--color-navy);
  --footer-bg-light: var(--color-navy-light);
  --footer-text: var(--color-gray-300);
  --footer-heading: var(--color-white);
  --footer-link: var(--color-gray-300);
  --footer-link-hover: var(--color-teal-light);

  /* Mobile Menu */
  --mobile-menu-width: 320px;
  --mobile-menu-bg: var(--color-navy);
  --mobile-menu-overlay: rgba(0, 0, 0, 0.5);

  /* Transitions */
  --header-transition: 300ms var(--ease-default);
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --header-bg: var(--color-gray-900);
  --header-bg-scrolled: rgba(15, 23, 42, 0.98);
  --header-border: var(--color-gray-800);
}


/* ==========================================================================
   HEADER
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: var(--header-bg);
  transition: all var(--header-transition);
}

/* Header Wrapper */
.header__wrapper {
  border-bottom: 1px solid transparent;
  transition: all var(--header-transition);
}

/* Scrolled State */
.site-header.is-scrolled {
  background: var(--header-bg-scrolled);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-header.is-scrolled .header__wrapper {
  border-bottom-color: var(--header-border);
  box-shadow: var(--header-shadow);
}

/* Hidden on scroll down */
.site-header.is-hidden {
  transform: translateY(-100%);
}

/* Header Container */
.header__container {
  max-width: var(--container-7xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Header Inner */
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-6);
  transition: height var(--header-transition);
}

.site-header.is-scrolled .header__inner {
  height: var(--header-height-scrolled);
}

/* Progress Bar */
.header__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  overflow: hidden;
}

.header__progress-bar {
  height: 100%;
  width: 0;
  background: var(--gradient-cta);
  transition: width 100ms linear;
}


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

.header__brand {
  flex-shrink: 0;
}

.header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition-fast) var(--ease-default);
}

.header__logo:hover {
  opacity: 0.8;
}

.header__logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
  transition: height var(--header-transition);
}

.site-header.is-scrolled .header__logo-img {
  height: 32px;
}

.header__logo-text {
  font-family: var(--font-family-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-navy);
  letter-spacing: var(--tracking-tight);
}


/* ==========================================================================
   DESKTOP NAVIGATION
   ========================================================================== */

.header__nav {
  display: none;
  flex: 1;
  justify-content: center;
}

@media (min-width: 1024px) {
  .header__nav {
    display: flex;
  }
}

/* Menu List */
.header__menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Menu Item */
.header__menu-item {
  position: relative;
}

/* Menu Link */
.header__menu-link {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 8px 16px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast) var(--ease-default);
}

.header__menu-link:hover {
  color: var(--color-royal);
  background: var(--color-gray-100);
}

.header__menu-item.is-active > .header__menu-link {
  color: var(--color-royal);
}

/* Menu Arrow */
.header__menu-arrow {
  display: flex;
  transition: transform var(--transition-fast) var(--ease-default);
}

.header__menu-item--has-dropdown:hover .header__menu-arrow {
  transform: rotate(180deg);
}

/* Dropdown Submenu */
.header__submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 220px;
  padding: var(--space-2);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast) var(--ease-default);
  list-style: none;
  margin: 0;
}

.header__menu-item--has-dropdown:hover > .header__submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Submenu Items */
.header__submenu .header__menu-item {
  width: 100%;
}

.header__submenu .header__menu-link {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
}

.header__submenu .header__menu-link:hover {
  background: var(--color-gray-50);
}


/* ==========================================================================
   HEADER ACTIONS
   ========================================================================== */

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Icon Buttons */
.btn--icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
  color: var(--color-gray-600);
  background: transparent;
  transition: all var(--transition-fast) var(--ease-default);
}

.btn--icon:hover {
  color: var(--color-royal);
  background: var(--color-gray-100);
}

.btn--icon svg {
  width: 20px;
  height: 20px;
}

/* WhatsApp Button */
.header__whatsapp:hover {
  color: var(--color-whatsapp);
  background: rgba(37, 211, 102, 0.1);
}

/* Cart Button */
.header__cart {
  position: relative;
}

.header__cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 11px;
  font-weight: var(--font-bold);
  line-height: 18px;
  text-align: center;
  color: var(--color-white);
  background: var(--color-error);
  border-radius: var(--radius-full);
  transform: scale(0);
  transition: transform var(--transition-fast) var(--ease-bounce);
}

.header__cart-count.is-visible {
  transform: scale(1);
}

/* CTA Button */
.header__cta {
  display: none;
}

@media (min-width: 768px) {
  .header__cta {
    display: inline-flex;
  }
}

.header__cta.btn--primary {
  gap: 24px;
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

.header__cta svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast) var(--ease-default);
}

.header__cta:hover svg {
  transform: translateX(4px);
}


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

.header__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

@media (min-width: 1024px) {
  .header__toggle {
    display: none;
  }
}

.header__toggle-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 24px;
  height: 24px;
  position: relative;
}

.header__toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-gray-700);
  border-radius: 1px;
  transition: all var(--transition-base) var(--ease-default);
}

.header__toggle-line:nth-child(1) {
  transform: translateY(-6px);
}

.header__toggle-line:nth-child(3) {
  transform: translateY(6px);
}

/* Animated X State */
.header__toggle[aria-expanded="true"] .header__toggle-line:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

.header__toggle[aria-expanded="true"] .header__toggle-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__toggle[aria-expanded="true"] .header__toggle-line:nth-child(3) {
  transform: translateY(0) rotate(-45deg);
}


/* ==========================================================================
   MOBILE MENU DRAWER
   ========================================================================== */

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal);
  pointer-events: none;
}

.mobile-menu[aria-hidden="false"] {
  pointer-events: auto;
}

/* Overlay */
.mobile-menu__overlay {
  position: absolute;
  inset: 0;
  background: var(--mobile-menu-overlay);
  opacity: 0;
  transition: opacity var(--transition-slow) var(--ease-default);
}

.mobile-menu[aria-hidden="false"] .mobile-menu__overlay {
  opacity: 1;
}

/* Drawer */
.mobile-menu__drawer {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: var(--mobile-menu-width);
  max-width: 90vw;
  background: var(--mobile-menu-bg);
  transform: translateX(100%);
  transition: transform var(--transition-slow) var(--ease-default);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu[aria-hidden="false"] .mobile-menu__drawer {
  transform: translateX(0);
}

/* Drawer Header */
.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-menu__brand .header__logo-img {
  height: 32px;
  filter: brightness(0) invert(1);
}

.mobile-menu__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast) var(--ease-default);
}

.mobile-menu__close:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Drawer Navigation */
.mobile-menu__nav {
  flex: 1;
  padding: var(--space-4) 0;
  overflow-y: auto;
}

.mobile-menu__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-menu__list li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-menu__list a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-white);
  text-decoration: none;
  transition: all var(--transition-fast) var(--ease-default);
}

.mobile-menu__list a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-teal-light);
}

/* Submenu in Mobile */
.mobile-menu__list .sub-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  background: rgba(0, 0, 0, 0.2);
}

.mobile-menu__list .sub-menu a {
  padding-left: var(--space-12);
  font-size: var(--text-sm);
  color: var(--color-gray-300);
}

/* Drawer Footer */
.mobile-menu__footer {
  padding: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-menu__cta,
.mobile-menu__whatsapp {
  width: 100%;
  justify-content: center;
  gap: var(--space-3);
}

.mobile-menu__social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
}

.mobile-menu__social .social-icon {
  color: var(--color-gray-400);
}

.mobile-menu__social .social-icon:hover {
  color: var(--color-white);
}


/* ==========================================================================
   MINIMAL HEADER (Landing Pages / Checkout)
   ========================================================================== */

.header--minimal .header__inner {
  height: var(--header-height-scrolled);
}

.header--minimal .header__nav {
  display: none;
}

.header__actions--minimal {
  gap: var(--space-4);
}

.header__security {
  display: none;
  align-items: center;
  gap: 24px;
  color: var(--color-gray-600);
  font-size: var(--text-sm);
}

@media (min-width: 768px) {
  .header__security {
    display: flex;
  }
}

.header__security svg {
  width: 18px;
  height: 18px;
  color: var(--color-success);
}


/* ==========================================================================
   TRANSPARENT HEADER
   ========================================================================== */

.header--transparent:not(.is-scrolled) {
  background: transparent;
}

.header--transparent:not(.is-scrolled) .header__logo-text,
.header--transparent:not(.is-scrolled) .header__menu-link,
.header--transparent:not(.is-scrolled) .btn--icon {
  color: var(--color-white);
}

.header--transparent:not(.is-scrolled) .header__menu-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

.header--transparent:not(.is-scrolled) .header__toggle-line {
  background: var(--color-white);
}


/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
}


/* ==========================================================================
   NEWSLETTER SECTION
   ========================================================================== */

.footer__newsletter {
  background: linear-gradient(135deg, var(--color-royal) 0%, var(--color-navy) 100%);
  padding: var(--space-12) 0;
}

.footer__newsletter-inner {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 768px) {
  .footer__newsletter-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.footer__newsletter-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.footer__newsletter-text {
  color: var(--color-gray-300);
  margin: 0;
}

/* Newsletter Form */
.newsletter-form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (min-width: 480px) {
  .newsletter-form__group {
    flex-direction: row;
  }
}

.newsletter-form__input {
  flex: 1;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-base);
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  outline: none;
  transition: all var(--transition-fast) var(--ease-default);
}

.newsletter-form__input::placeholder {
  color: var(--color-gray-400);
}

.newsletter-form__input:focus {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.2);
}

.newsletter-form__btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 24px;
  padding: var(--space-4) var(--space-6);
  font-weight: var(--font-semibold);
  white-space: nowrap;
}

.newsletter-form__btn-icon {
  display: flex;
}

.newsletter-form__spinner {
  display: none;
}

.newsletter-form__btn.is-loading .newsletter-form__btn-text,
.newsletter-form__btn.is-loading .newsletter-form__btn-icon {
  visibility: hidden;
}

.newsletter-form__btn.is-loading .newsletter-form__spinner {
  display: block;
  position: absolute;
}

.newsletter-form__notice {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}

.newsletter-form__notice svg {
  width: 16px;
  height: 16px;
  color: var(--color-success);
}

.newsletter-form__message {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  display: none;
}

.newsletter-form__message.is-success {
  display: block;
  color: var(--color-success);
  background: rgba(16, 185, 129, 0.1);
}

.newsletter-form__message.is-error {
  display: block;
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
}


/* ==========================================================================
   FOOTER MAIN
   ========================================================================== */

.footer__main {
  padding: var(--space-16) 0 var(--space-12);
}

.footer__grid {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-12);
  }
}

/* Footer Columns */
.footer__col {
  min-width: 0;
}

.footer__col--about {
  max-width: 320px;
}

/* Footer Branding */
.footer__brand {
  margin-bottom: var(--space-4);
}

.footer__brand .header__logo-img {
  height: 40px;
  filter: brightness(0) invert(1);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

/* Footer Titles */
.footer__title {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--footer-heading);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-5);
}

/* Footer Links */
.footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__links li {
  margin-bottom: var(--space-3);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--footer-link);
  text-decoration: none;
  transition: color var(--transition-fast) var(--ease-default);
}

.footer__links a:hover {
  color: var(--footer-link-hover);
}

/* Footer Contact */
.footer__contact {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--footer-link);
  text-decoration: none;
  transition: color var(--transition-fast) var(--ease-default);
}

.footer__contact-item:hover {
  color: var(--footer-link-hover);
}

.footer__contact-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-teal);
}


/* ==========================================================================
   SOCIAL ICONS
   ========================================================================== */

.footer__social {
  margin-top: var(--space-6);
}

.social-icons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.social-icons--premium .social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-gray-400);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast) var(--ease-default);
}

.social-icons--premium .social-icon:hover {
  color: var(--color-white);
  background: var(--icon-color, var(--color-gray-700));
  transform: translateY(-2px);
}

.social-icons--premium .social-icon svg {
  width: 20px;
  height: 20px;
}


/* ==========================================================================
   FOOTER BOTTOM
   ========================================================================== */

.footer__bottom {
  padding: var(--space-8) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__bottom-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: center;
  text-align: center;
}

@media (min-width: 1024px) {
  .footer__bottom-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* Copyright */
.footer__copyright {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.footer__copyright p {
  margin: 0;
}

.footer__cnpj {
  font-size: var(--text-xs);
  margin-top: var(--space-1);
  opacity: 0.7;
}

/* Payment Methods */
.footer__payments {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer__payments-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.footer__payments-icons {
  display: flex;
  gap: 24px;
}

.footer__payments-icons svg {
  opacity: 0.7;
  transition: opacity var(--transition-fast) var(--ease-default);
}

.footer__payments-icons svg:hover {
  opacity: 1;
}

/* Security */
.footer__security {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.security-seal {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: var(--text-xs);
  color: var(--color-gray-400);
}

.security-seal svg {
  width: 18px;
  height: 18px;
  color: var(--color-success);
}

/* Disclaimer */
.footer__disclaimer {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer__disclaimer p {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
  text-align: center;
  margin: 0;
}


/* ==========================================================================
   MINIMAL FOOTER (Checkout / Landing Pages)
   ========================================================================== */

.footer--minimal {
  padding: var(--space-8) 0;
  background: var(--color-gray-900);
}

.footer-minimal__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-minimal__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-minimal__brand .header__logo-img {
  height: 28px;
  filter: brightness(0) invert(1);
}

.footer-minimal__security {
  display: flex;
  gap: var(--space-6);
}

.footer-minimal__security .security-badge {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: var(--text-xs);
  color: var(--color-gray-400);
}

.footer-minimal__security .security-badge svg {
  width: 16px;
  height: 16px;
  color: var(--color-success);
}

.footer-minimal__legal {
  display: flex;
  align-items: center;
}

.footer-minimal__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-minimal__links a {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  text-decoration: none;
  transition: color var(--transition-fast) var(--ease-default);
}

.footer-minimal__links a:hover {
  color: var(--color-white);
}

.footer-minimal__copyright {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin: 0;
}


/* ==========================================================================
   BACK TO TOP BUTTON
   ========================================================================== */

.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-fixed);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  color: var(--color-white);
  background: var(--color-navy);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base) var(--ease-default);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-royal);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
}

/* Adjust position when WhatsApp is visible */
.whatsapp-float.is-visible ~ .back-to-top {
  bottom: calc(var(--space-6) + 70px);
}


/* ==========================================================================
   WHATSAPP FLOATING BUTTON
   ========================================================================== */

.whatsapp-float {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-fixed);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.9);
  transition: all var(--transition-base) var(--ease-default);
}

.whatsapp-float.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.whatsapp-float__btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  color: var(--color-white);
  background: var(--color-whatsapp);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg), var(--glow-whatsapp);
  text-decoration: none;
  transition: all var(--transition-fast) var(--ease-default);
}

.whatsapp-float__btn:hover {
  background: var(--color-whatsapp-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), 0 0 30px rgba(37, 211, 102, 0.5);
}

/* Pulse Animation */
.whatsapp-float__pulse {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: var(--color-whatsapp);
  border-radius: var(--radius-full);
  transform: translate(-50%, -50%);
  animation: whatsapp-pulse 2s infinite;
  z-index: -1;
}

@keyframes whatsapp-pulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.5;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.5);
    opacity: 0;
  }
}

.whatsapp-float__icon {
  display: flex;
}

.whatsapp-float__icon svg {
  width: 24px;
  height: 24px;
}

.whatsapp-float__text {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  white-space: nowrap;
}

/* Hide text on mobile */
@media (max-width: 639px) {
  .whatsapp-float__btn {
    padding: var(--space-4);
  }

  .whatsapp-float__text {
    display: none;
  }
}

.whatsapp-float__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  color: var(--color-gray-400);
  background: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast) var(--ease-default);
}

.whatsapp-float:hover .whatsapp-float__close {
  opacity: 1;
}

.whatsapp-float__close:hover {
  color: var(--color-gray-600);
}

.whatsapp-float__close svg {
  width: 14px;
  height: 14px;
}


/* ==========================================================================
   SPINNER
   ========================================================================== */

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}


/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

.screen-reader-text {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-max);
  padding: var(--space-4) var(--space-6);
  color: var(--color-white);
  background: var(--color-royal);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: var(--font-semibold);
  transition: top var(--transition-fast) var(--ease-default);
}

.skip-link:focus {
  top: var(--space-4);
}


/* ==========================================================================
   BODY OFFSET FOR FIXED HEADER
   ========================================================================== */

body {
  padding-top: var(--header-height);
}

body.header-hidden {
  padding-top: 0;
}


/* ==========================================================================
   WIDGETS IN FOOTER
   ========================================================================== */

.footer__col .widget {
  margin-bottom: 0;
}

.footer__col .widget-title {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--footer-heading);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-5);
}

.footer__col .widget ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__col .widget ul li {
  margin-bottom: var(--space-3);
}

.footer__col .widget a {
  font-size: var(--text-sm);
  color: var(--footer-link);
  text-decoration: none;
  transition: color var(--transition-fast) var(--ease-default);
}

.footer__col .widget a:hover {
  color: var(--footer-link-hover);
}