/* ==========================================================================
   CSS RESET & BASE STYLES
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

button {
  border: none;
  background: none;
  font: inherit;
  cursor: pointer;
  transition: all 0.3s ease;
}

ul {
  list-style: none;
}

/* ==========================================================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ========================================================================== */

:root {
  /* Colors - Professional Optical Shop Palette */
  --color-primary: #2C5F41;        /* Deep forest green */
  --color-primary-light: #4A7C59;  /* Lighter green */
  --color-primary-dark: #1E4027;   /* Darker green */
  --color-secondary: #8FBC8F;      /* Sage green */
  --color-accent: #F0F8E8;         /* Very light green */
  
  --color-text: #2C2C2C;           /* Dark charcoal */
  --color-text-light: #5A5A5A;     /* Medium gray */
  --color-text-muted: #888888;     /* Light gray */
  
  --color-background: #FFFFFF;     /* Pure white */
  --color-surface: #F8FBF6;        /* Very light sage */
  --color-surface-dark: #F0F6ED;   /* Light sage background */
  
  --color-border: #E0E0E0;
  --color-border-light: #F0F0F0;
  
  --color-success: #28a745;
  --color-warning: #ffc107;
  --color-error: #dc3545;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  --spacing-xxxl: 4rem;
  
  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-xxl: 1.5rem;
  --font-size-xxxl: 2rem;
  --font-size-display: 3rem;
  
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-loose: 1.8;
  
  /* Layout */
  --container-max-width: 1200px;
  --container-padding: var(--spacing-md);
  
  /* Border Radius */
  --border-radius: 0.5rem;
  --border-radius-sm: 0.25rem;
  --border-radius-lg: 1rem;
  --border-radius-full: 9999px;
  
  /* Shadows */
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-large: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

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

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: white;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  z-index: var(--z-tooltip);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Focus styles */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   COMPONENTS - BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 2px solid transparent;
  min-height: 44px; /* Accessibility: minimum touch target */
}

.btn--primary {
  background-color: var(--color-primary);
  color: white;
}

.btn--primary:hover,
.btn--primary:focus {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--secondary:hover,
.btn--secondary:focus {
  background-color: var(--color-primary);
  color: white;
}

/* ==========================================================================
   LAYOUT - HEADER & NAVIGATION
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
  box-shadow: 0 2px 10px rgba(44, 95, 65, 0.1);
}

.header--scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-medium);
}

.nav__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
}

.nav__brand {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.nav__brand:hover {
  transform: translateY(-1px);
}

/* Ensure anchor tag inside nav__brand also displays as flex */
.nav__brand a {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-normal);
}

.nav__brand a:hover {
  transform: translateY(-1px);
}

.nav__logo {
  height: 50px;
  width: auto;
  transition: transform var(--transition-normal);
}

.nav__logo:hover {
  transform: scale(1.05);
}

.nav__brand-text {
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
  transition: color var(--transition-normal);
}

.nav__brand:hover .nav__brand-text {
  color: var(--color-primary-light);
}

/* Hide brand text on very small screens */
@media (max-width: 480px) {
  .nav__brand-text {
    display: none;
  }
}

.nav__toggle {
  display: none;
  flex-direction: column;
  width: 30px;
  height: 30px;
  justify-content: space-around;
  z-index: var(--z-modal);
}

.nav__toggle-line {
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: var(--border-radius-full);
  transition: all var(--transition-normal);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav__link {
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  position: relative;
}

.nav__link:hover,
.nav__link:focus {
  color: var(--color-primary);
  background-color: var(--color-surface);
}

.nav__link--active {
  color: var(--color-primary);
  background-color: var(--color-surface);
}

/* ==========================================================================
   LAYOUT - MAIN CONTENT
   ========================================================================== */

.main {
  padding-top: 70px; /* Header height */
}

/* Scroll offset for fixed header */
html {
  scroll-padding-top: 90px; /* Header height + extra spacing */
}

/* Section scroll offset */
section[id] {
  scroll-margin-top: 90px;
}

/* Container utility */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ==========================================================================
   HOMEPAGE - HERO SECTION
   ========================================================================== */

.hero {
  padding: var(--spacing-xxxl) 0;
  background: linear-gradient(135deg, var(--color-surface) 0%, white 100%);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxxl);
  align-items: center;
}

.hero__title {
  font-size: var(--font-size-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

.hero__brand {
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  font-weight: var(--font-weight-medium);
}

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xxl);
  line-height: var(--line-height-loose);
}

.hero__actions {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.hero__image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__image-placeholder {
  width: 100%;
  max-width: 400px;
  height: 300px;
  background: var(--color-surface);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-large);
  overflow: hidden;
}

.hero__svg {
  width: 100%;
  height: 100%;
}

.hero__presentation-image {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-large);
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.hero__presentation-image:hover {
  transform: scale(1.02);
}

/* ==========================================================================
   HOMEPAGE - ABOUT SECTION
   ========================================================================== */

.about {
  padding: var(--spacing-xxxl) 0;
  background-color: var(--color-surface);
}

.about__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.about__title {
  font-size: var(--font-size-xxxl);
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--spacing-xxxl);
  color: var(--color-text);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xxl);
}

.about__card {
  background: white;
  padding: var(--spacing-xxl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-light);
  text-align: center;
  transition: all var(--transition-normal);
}

.about__card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

.about__card-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-lg);
  background: var(--color-primary);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.about__card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.about__card-description {
  color: var(--color-text-light);
  line-height: var(--line-height-loose);
}

/* ==========================================================================
   HOMEPAGE - SERVICES SECTION
   ========================================================================== */

.services {
  padding: var(--spacing-xxxl) 0;
}

.services__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.services__title {
  font-size: var(--font-size-xxxl);
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--spacing-xxxl);
  color: var(--color-text);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.service__card {
  background: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-primary);
  transition: all var(--transition-normal);
}

.service__card:hover {
  background: white;
  box-shadow: var(--shadow-medium);
}

.service__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.service__description {
  color: var(--color-text-light);
  line-height: var(--line-height-loose);
}

/* ==========================================================================
   HOMEPAGE - CONTACT SECTION
   ========================================================================== */

.contact {
  padding: var(--spacing-xxxl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
}

.contact__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.contact__title {
  font-size: var(--font-size-xxxl);
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.contact__description {
  font-size: var(--font-size-lg);
  text-align: center;
  margin-bottom: var(--spacing-xxl);
  opacity: 0.9;
}

.contact__info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xxl);
}

.contact__item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  backdrop-filter: blur(10px);
}

.contact__icon {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact__item-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.contact__item-text {
  opacity: 0.9;
}

/* WhatsApp Button */
.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-sm);
  background: #25D366;
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-light);
}

.whatsapp-btn:hover,
.whatsapp-btn:focus {
  background: #20C759;
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
  text-decoration: none;
  color: white;
}

.whatsapp-btn:active {
  transform: translateY(0);
}

.whatsapp-btn svg {
  flex-shrink: 0;
}

/* Responsive WhatsApp button */
@media (max-width: 768px) {
  .whatsapp-btn {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .whatsapp-btn svg {
    width: 16px;
    height: 16px;
  }
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
}

.whatsapp-float__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: #25D366;
  color: white;
  border-radius: 50%;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: all var(--transition-normal);
  animation: whatsapp-pulse 2s infinite;
}

.whatsapp-float__btn:hover,
.whatsapp-float__btn:focus {
  background: #20C759;
  transform: scale(1.1);
  box-shadow: 0 6px 25px rgba(37, 211, 102, 0.6);
  text-decoration: none;
  color: white;
}

.whatsapp-float__btn:active {
  transform: scale(0.95);
}

/* WhatsApp pulse animation */
@keyframes whatsapp-pulse {
  0% {
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  }
  50% {
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.6), 0 0 0 10px rgba(37, 211, 102, 0.1);
  }
  100% {
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  }
}

/* Responsive floating button */
@media (max-width: 768px) {
  .whatsapp-float {
    bottom: 20px;
    right: 20px;
  }
  
  .whatsapp-float__btn {
    width: 50px;
    height: 50px;
  }
  
  .whatsapp-float__btn svg {
    width: 24px;
    height: 24px;
  }
}

/* Ensure floating button stays above other elements */
@media (prefers-reduced-motion: reduce) {
  .whatsapp-float__btn {
    animation: none;
  }
}

/* ==========================================================================
   MARCAS PAGE - PRODUCTS
   ========================================================================== */

.page-header {
  padding: var(--spacing-xxxl) 0 var(--spacing-xxl);
  background: linear-gradient(135deg, var(--color-surface) 0%, white 100%);
  text-align: center;
}

.page-header__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.page-header__title {
  font-size: var(--font-size-display);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

.page-header__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
}

.products {
  padding: var(--spacing-xxxl) 0;
}

.products__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.products__section-title {
  font-size: var(--font-size-xxxl);
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--spacing-xxl);
  color: var(--color-text);
}

/* Filter buttons */
.products__filters {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xxxl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-full);
  background: white;
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-normal);
  min-height: 44px;
}

.filter-btn:hover,
.filter-btn:focus {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-btn--active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* Products grid */
.products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xxl);
}

.product-card {
  background: white;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

.product-card__image-container {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.product-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(139, 69, 19, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-normal);
}

.product-card:hover .product-card__overlay {
  opacity: 1;
}

.product-card:hover .product-card__image {
  transform: scale(1.1);
}

.product-card__btn {
  background: white;
  color: var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-normal);
}

.product-card__btn:hover {
  background: var(--color-surface);
}

.product-card__content {
  padding: var(--spacing-xl);
}

.product-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.product-card__price {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.product-card__description {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-loose);
}

.product-card__features {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.product-card__feature {
  background: var(--color-surface);
  color: var(--color-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* Price Range Filter */
.price-filter {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xxl);
  box-shadow: var(--shadow-light);
  border: 1px solid var(--color-border-light);
}

.price-filter__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
  text-align: center;
}

.price-filter__container {
  max-width: 400px;
  margin: 0 auto;
}

.price-filter__slider-container {
  position: relative;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md) 0;
}

.price-filter__slider {
  position: relative;
  height: 8px;
  margin: 0 12px;
}

.price-filter__track {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--color-surface-dark);
  border-radius: var(--border-radius-full);
}

.price-filter__range {
  position: absolute;
  top: 0;
  height: 8px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--border-radius-full);
  transition: all var(--transition-normal);
}

.price-filter__input {
  position: absolute;
  top: -8px;
  width: 100%;
  height: 24px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  pointer-events: all;
  cursor: pointer;
  z-index: 2;
}

.price-filter__input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border: 3px solid white;
  border-radius: 50%;
  cursor: pointer;
  pointer-events: all;
  box-shadow: var(--shadow-medium);
  transition: all var(--transition-normal);
}

.price-filter__input::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-large);
}

.price-filter__input::-webkit-slider-thumb:active {
  transform: scale(1.2);
}

.price-filter__input::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border: 3px solid white;
  border-radius: 50%;
  cursor: pointer;
  pointer-events: all;
  box-shadow: var(--shadow-medium);
  transition: all var(--transition-normal);
  -moz-appearance: none;
}

.price-filter__input::-moz-range-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-large);
}

.price-filter__input::-moz-range-track {
  background: transparent;
  border: none;
}

.price-filter__input:focus {
  outline: none;
}

.price-filter__input:focus::-webkit-slider-thumb {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.price-filter__input:focus::-moz-range-thumb {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.price-filter__display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.price-filter__values {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.price-filter__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
}

.price-filter__value {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.price-filter__reset {
  background: var(--color-surface);
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.price-filter__reset:hover,
.price-filter__reset:focus {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* CTA Section */
.cta {
  padding: var(--spacing-xxxl) 0;
  background: var(--color-surface);
  text-align: center;
}

.cta__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.cta__title {
  font-size: var(--font-size-xxxl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

.cta__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xxl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta__actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

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

.footer {
  background: var(--color-text);
  color: white;
  padding: var(--spacing-xxxl) 0 var(--spacing-xl);
}

.footer__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xxl);
  margin-bottom: var(--spacing-xxl);
}

.footer__logo {
  margin-bottom: var(--spacing-lg);
  filter: brightness(0) invert(1);
}

.footer__description {
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--line-height-loose);
}

.footer__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__link {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-normal);
}

.footer__link:hover,
.footer__link:focus {
  color: white;
}

.footer__address {
  color: rgba(255, 255, 255, 0.8);
  font-style: normal;
  line-height: var(--line-height-loose);
}

.footer__address p {
  margin-bottom: var(--spacing-xs);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer__watermark {
  opacity: 0.6;
}

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

.footer__copyright {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

/* Tablet styles */
@media (max-width: 768px) {
  :root {
    --font-size-display: 2.5rem;
    --font-size-xxxl: 1.75rem;
    --spacing-xxxl: 3rem;
    --spacing-xxl: 2rem;
  }

  /* Navigation */
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: white;
    flex-direction: column;
    justify-content: center;
    gap: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-normal);
    z-index: var(--z-modal);
  }

  .nav__menu--open {
    right: 0;
  }

  .nav__toggle--open .nav__toggle-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .nav__toggle--open .nav__toggle-line:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle--open .nav__toggle-line:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }

  /* Hero section */
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xxl);
  }

  .hero__actions {
    justify-content: center;
  }

  /* Grid adjustments */
  .about__grid,
  .services__grid {
    grid-template-columns: 1fr;
  }

  .products__grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
  }

  /* Contact info */
  .contact__info {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer__content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* Mobile styles */
@media (max-width: 480px) {
  :root {
    --container-padding: var(--spacing-md);
    --font-size-display: 2rem;
    --spacing-xxxl: 2rem;
    --spacing-xxl: 1.5rem;
  }

  .hero {
    padding: var(--spacing-xxl) 0;
    min-height: 60vh;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__actions,
  .cta__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .products__filters {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-btn {
    width: 100%;
  }

  .products__grid {
    grid-template-columns: 1fr;
  }

  .product-card__features {
    justify-content: center;
  }
}

/* ==========================================================================
   ANIMATIONS & EFFECTS
   ========================================================================== */

/* Fade in animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

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

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 8px rgba(0, 0, 0, 0.3);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}