/* ========================================
   Appliance Parts Center - Design System
   Brand Color: #B0A986 (warm beige/tan)
   ======================================== */

/* CSS Custom Properties */
:root {
  /* Primary Brand Colors */
  --color-primary: #B0A986;
  --color-primary-dark: #8C8568;
  --color-primary-light: #D4CCAD;
  --color-primary-very-light: #F5F2EA;
  
  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-gray-50: #FAFAFA;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #E5E5E5;
  --color-gray-300: #D4D4D4;
  --color-gray-400: #A3A3A3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;
  --color-black: #000000;
  
  /* Accent Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  
  /* Typography Scale */
  --font-primary: 'Arial', 'Helvetica', sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

@media (max-width: 768px) {
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--color-gray-900);
}

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-gray-600);
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

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

.text-white {
  color: var(--color-white);
}

.text-gray {
  color: var(--color-gray-500);
}

/* Section Base */
.section {
  padding: var(--space-20) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title h2 {
  margin-bottom: var(--space-4);
}

.section-title p {
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-16) 0;
  }
  
  h1 {
    font-size: var(--text-4xl);
  }
  
  h2 {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: var(--text-3xl);
  }
  
  h2 {
    font-size: var(--text-2xl);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  gap: var(--space-2);
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-white);
  color: var(--color-gray-900);
}

.btn-dark {
  background-color: var(--color-gray-900);
  color: var(--color-white);
}

.btn-dark:hover {
  background-color: var(--color-gray-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline-dark {
  background-color: transparent;
  color: var(--color-gray-900);
  border: 2px solid var(--color-gray-900);
}

.btn-outline-dark:hover {
  background-color: var(--color-gray-900);
  color: var(--color-white);
}

.btn-lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
}

/* Cards */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.card-content {
  padding: var(--space-6);
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  color: var(--color-gray-900);
}

.card-text {
  color: var(--color-gray-600);
  font-size: var(--text-base);
}

/* Grids */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

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

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--space-2);
}

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

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* Logo Styles */
.logo img, 
img.logo, 
.logo-link img, 
a.logo img {
  height: 50px;
  width: auto;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-weight: 500;
  color: var(--color-gray-700);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after {
  width: 100%;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.phone-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-gray-900);
}

.phone-link:hover {
  color: var(--color-primary);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-gray-900);
  transition: all var(--transition-base);
}

@media (max-width: 1024px) {
  .nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  
  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .header-cta .btn {
    display: none;
  }
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 65vh;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gray-900);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.4) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: var(--space-8);
  text-align: center;
  max-width: 100%;
  word-wrap: break-word;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-6);
  font-size: var(--text-5xl);
  max-width: 100%;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--text-xl);
  margin-bottom: var(--space-8);
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background-color: rgba(176, 169, 134, 0.2);
  border: 1px solid var(--color-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
  .hero {
    min-height: 500px;
  }
  
  .hero h1 {
    font-size: var(--text-3xl);
  }
  
  .hero p {
    font-size: var(--text-lg);
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: var(--text-2xl);
  }
  
  .hero-badge {
    font-size: var(--text-xs);
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* Services Section */
.services-section {
  background-color: var(--color-gray-50);
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.service-card-content {
  padding: var(--space-6);
}

.service-card-content h3 {
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

.service-card-content p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
}

.service-list {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
}

.service-list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  color: var(--color-gray-700);
  font-size: var(--text-sm);
}

.service-list li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: bold;
}

/* Why Choose Us Section */
.why-section {
  background-color: var(--color-white);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.why-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  background-color: var(--color-gray-50);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.why-card:hover {
  background-color: var(--color-primary-very-light);
  transform: translateY(-4px);
}

.why-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.why-content h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
  color: var(--color-gray-900);
}

.why-content p {
  color: var(--color-gray-600);
  margin: 0;
}

@media (max-width: 768px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
}

/* Brands Section */
.brands-section {
  background-color: var(--color-gray-50);
}

.brands-category {
  margin-bottom: var(--space-12);
}

.brands-category:last-child {
  margin-bottom: 0;
}

.brands-category h3 {
  text-align: center;
  margin-bottom: var(--space-6);
  color: var(--color-gray-700);
  font-size: var(--text-xl);
}

.brands-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.brand-tag {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 500;
  color: var(--color-gray-700);
  transition: all var(--transition-fast);
}

.brand-tag:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.brands-image {
  margin-top: var(--space-12);
  text-align: center;
}

.brands-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Testimonials Section */
.testimonials-section {
  background-color: var(--color-white);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background-color: var(--color-gray-50);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  font-size: var(--text-6xl);
  color: var(--color-primary);
  opacity: 0.3;
  position: absolute;
  top: var(--space-2);
  left: var(--space-4);
  line-height: 1;
}

.testimonial-stars {
  color: #F59E0B;
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.testimonial-text {
  color: var(--color-gray-700);
  font-style: italic;
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}

.testimonial-author {
  font-weight: 600;
  color: var(--color-gray-900);
}

.testimonial-service {
  font-size: var(--text-sm);
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

/* Service Areas Section */
.areas-section {
  background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
  color: var(--color-white);
}

.areas-section .section-title h2 {
  color: var(--color-white);
}

.areas-section .section-title p {
  color: rgba(255, 255, 255, 0.8);
}

.areas-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.area-tag {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.area-tag:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Contact Section */
.contact-section {
  background-color: var(--color-primary-very-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.contact-info h2 {
  margin-bottom: var(--space-6);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--text-xl);
}

.contact-text h4 {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.contact-text p {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin: 0;
}

.contact-map {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  height: 400px;
}

.contact-map iframe {
  width: 100%;
  height: 100%;
  border: none;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-map {
    height: 300px;
  }
}

/* Trust Badges */
.trust-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background-color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  box-shadow: var(--shadow-sm);
}

.trust-badge-icon {
  color: var(--color-primary);
  font-size: var(--text-lg);
}

/* Footer */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  margin-bottom: var(--space-4);
}

.footer-logo img {
  height: 50px;
  width: auto;
}

.footer-brand p {
  color: var(--color-gray-400);
  margin-bottom: var(--space-4);
}

.footer-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-white);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-contact p {
  color: var(--color-gray-400);
  margin-bottom: var(--space-2);
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-800);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

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

.social-link {
  width: 40px;
  height: 40px;
  background-color: var(--color-gray-800);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--color-primary);
  transform: translateY(-2px);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease-out forwards;
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-slideInLeft {
  animation: slideInLeft 0.8s ease-out forwards;
}

.animate-slideInRight {
  animation: slideInRight 0.8s ease-out forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Stagger animation delays */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }

/* Initial state for animated elements */
[data-animate] {
  opacity: 0;
}

[data-animate].animate-visible {
  opacity: 1;
}

/* Utility Classes */
.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;
}

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

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

.bg-gray-50 {
  background-color: var(--color-gray-50);
}

.mb-0 {
  margin-bottom: 0;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-8 {
  margin-top: var(--space-8);
}

.pt-0 {
  padding-top: 0;
}

/* Scroll to top button */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-4px);
}