/* ============================================================================
   GentleHold Brand Stylesheet
   Semantic HTML5 + Vanilla CSS
   ============================================================================ */

/* ============================================================================
   1. CSS VARIABLES & THEME
   ============================================================================ */

:root {
  /* Brand Colors */
  --warm-beige: #C9B8A3;
  --warm-beige-light: #D4C4B0;
  --matte-white: #F5F3F0;
  --dark-wood: #6B5344;
  --dark-wood-light: #8B7355;
  --black: #1A1A1A;
  --gold: #D4AF37;
  
  /* Semantic Colors */
  --primary: #6B5344;
  --primary-foreground: #F5F3F0;
  --secondary: #D4C4B0;
  --secondary-foreground: #1A1A1A;
  --background: #F5F3F0;
  --foreground: #1A1A1A;
  --card: #FFFFFF;
  --card-foreground: #1A1A1A;
  --border: #E8E4DF;
  --muted: #E8E4DF;
  --muted-foreground: #6B5344;
  --accent: #C9B8A3;
  --accent-foreground: #1A1A1A;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-display: 'Montserrat', system-ui, sans-serif;
  
  /* Spacing */
  --radius: 0.5rem;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
}

/* Dark Mode */
body.dark-mode {
  --primary: #D4C4B0;
  --primary-foreground: #1A1A1A;
  --background: #0F0F0F;
  --foreground: #F5F3F0;
  --card: #1A1A1A;
  --card-foreground: #F5F3F0;
  --border: #2A2520;
  --muted: #2A2520;
  --muted-foreground: #D4C4B0;
}

/* ============================================================================
   2. RESET & BASE STYLES
   ============================================================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--dark-wood-light);
}

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}

/* ============================================================================
   3. TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 1.875rem;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

/* ============================================================================
   4. LAYOUT & CONTAINER
   ============================================================================ */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
  max-width: 1280px;
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }
}

/* ============================================================================
   5. HEADER & NAVIGATION
   ============================================================================ */

header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

header.dark-header {
  background-color: transparent;
}

header.dark-header nav {
  color: white;
}

header.dark-header nav a,
header.dark-header nav button {
  color: white;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  padding: 0 var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.logo img {
  height: 4rem;
  width: auto;
  object-fit: contain;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-text .brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--foreground);
}

.logo-text .brand-tagline {
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

.nav-menu {
  display: none;
  gap: var(--spacing-lg);
  align-items: center;
}

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

.nav-menu a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: color 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
  border-bottom: 2px solid var(--warm-beige);
  padding-bottom: var(--spacing-xs);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.language-switcher {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.language-switcher:hover {
  background-color: var(--muted);
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  min-width: 160px;
  margin-top: var(--spacing-sm);
  z-index: 1000;
  pointer-events: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.language-switcher:hover .language-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  display: block;
}

.language-switcher:hover,
.language-switcher.active {
  background-color: var(--muted);
}

.language-dropdown button {
  width: 100%;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.875rem;
  transition: background-color 0.3s ease;
}

.language-dropdown button:hover {
  background-color: var(--muted);
}

.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* ============================================================================
   6. HERO SECTION
   ============================================================================ */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  min-height: 100vh;
  padding: var(--spacing-3xl) var(--spacing-md);
  background: linear-gradient(135deg, var(--matte-white) 0%, var(--background) 100%);
}

@media (min-width: 768px) {
  .hero {
    grid-template-columns: 1fr 1fr;
    padding: var(--spacing-3xl) var(--spacing-xl);
  }
}

.hero-content h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--foreground);
}

.hero-content p {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-lg);
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  background: linear-gradient(135deg, var(--warm-beige) 0%, var(--warm-beige-light) 100%);
  border-radius: calc(var(--radius) * 4);
  padding: var(--spacing-2xl);
}

.hero-visual img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

/* ============================================================================
   7. BUTTONS
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.3s ease;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background-color: var(--dark-wood-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(107, 83, 68, 0.3);
}

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

.btn-secondary:hover {
  background-color: var(--dark-wood);
  color: white;
}

.btn-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

/* ============================================================================
   8. PRODUCT SECTIONS
   ============================================================================ */

section {
  padding: var(--spacing-3xl) var(--spacing-md);
}

@media (min-width: 768px) {
  section {
    padding: var(--spacing-3xl) var(--spacing-xl);
  }
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.section-title p {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  max-width: 600px;
  margin: 0 auto;
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.product-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.product-image {
  width: 100%;
  height: 250px;
  background: linear-gradient(135deg, var(--warm-beige) 0%, var(--warm-beige-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-content {
  padding: var(--spacing-lg);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.product-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--foreground);
}

.product-model {
  font-size: 0.75rem;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-md);
}

.product-description {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.product-specs {
  font-size: 0.75rem;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border);
}

.product-action {
  margin-top: auto;
}

/* ============================================================================
   9. TWO-COLUMN LAYOUT (Commercial Specs)
   ============================================================================ */

.two-column-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

@media (min-width: 768px) {
  .two-column-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.column-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
}

.column-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--warm-beige) 0%, var(--warm-beige-light) 100%);
  min-height: 300px;
}

.column-image {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.05);
  border-radius: var(--radius);
  overflow: hidden;
  height: 250px;
  min-height: 250px;
}

.column-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.column-content {
  padding: var(--spacing-lg);
}

.column-content h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.column-content .subtitle {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-md);
}

.column-content p {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.specs-list {
  font-size: 0.75rem;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border);
}

/* ============================================================================
   10. DARK SECTION (Night Guardians)
   ============================================================================ */

.dark-section {
  background-color: #1A1A1A;
  color: white;
}

.dark-section h2,
.dark-section h3,
.dark-section p {
  color: white;
}

.dark-section .product-card {
  background-color: #2A2A2A;
  border-color: #3A3A3A;
}

.dark-section .product-name {
  color: white;
}

.dark-section .product-description,
.dark-section .product-specs {
  color: #D4C4B0;
}

/* ============================================================================
   11. FOOTER
   ============================================================================ */

footer {
  background-color: var(--dark-wood);
  color: white;
  padding: var(--spacing-2xl) var(--spacing-md);
  margin-top: var(--spacing-3xl);
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  color: white;
}

.footer-section p,
.footer-section a {
  font-size: 0.875rem;
  color: var(--warm-beige-light);
  margin-bottom: var(--spacing-sm);
}

.footer-section a:hover {
  color: white;
}

.footer-logo {
  height: 3.5rem;
  width: auto;
  margin-bottom: var(--spacing-md);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: 0.75rem;
  color: var(--warm-beige-light);
}

/* ============================================================================
   12. CONTACT FORM
   ============================================================================ */

.contact-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  max-width: 1000px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .contact-container {
    grid-template-columns: 2fr 1fr;
  }
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--foreground);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  background-color: var(--card);
  color: var(--foreground);
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(107, 83, 68, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

.contact-info {
  background-color: var(--muted);
  padding: var(--spacing-lg);
  border-radius: calc(var(--radius) * 2);
}

.contact-info h3 {
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  margin-bottom: var(--spacing-lg);
}

.contact-item strong {
  display: block;
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

.contact-item p {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin: 0;
}

/* ============================================================================
   13. UTILITY CLASSES
   ============================================================================ */

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

.text-muted {
  color: var(--muted-foreground);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

/* ============================================================================
   14. RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.875rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-visual {
    min-height: 300px;
  }

  section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
}

/* ============================================================================
   15. ANIMATIONS
   ============================================================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}