/* Leeleberd Led Lights - Design System CSS */
/* Based on Design Proposal v1.0 */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Color Palette */
  --color-primary: #0A84FF;      /* Electric Blue */
  --color-secondary: #14D2A1;    /* Neon Teal */
  --color-accent: #6A5ACD;       /* Deep Violet */
  --color-dark: #0E1B2A;         /* Dark */
  --color-medium: #2C2C2C;       /* Medium */
  --color-light: #F7F7F7;        /* Light */
  --color-white: #FFFFFF;        /* Ultra-White */
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 1rem;
  --font-size-small: 0.875rem;
  --font-size-h1: 2.75rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.5rem;
  --line-height-base: 1.6;
  --line-height-heading: 1.2;
  
  /* Spacing Scale (multiples of 4px) */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-7: 1.75rem;   /* 28px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-14: 3.5rem;   /* 56px */
  --space-18: 4.5rem;   /* 72px */
  --space-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* 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);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Layout */
  --container-max-width: 1200px;
  --container-padding: var(--space-4);
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-dark);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-heading);
  margin-bottom: var(--space-4);
  color: var(--color-dark);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: 800;
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-accent);
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-normal);
}

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

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

/* Header */
.header {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-light);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.logo-image {
  height: 40px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
}

/* Responsive logo adjustments */
@media (max-width: 768px) {
  .logo-image {
    height: 32px;
    max-width: 160px;
  }
}

@media (max-width: 480px) {
  .logo-image {
    height: 28px;
    max-width: 140px;
  }
}

.logo:hover {
  color: var(--color-secondary);
}

/* Navigation */
.nav-toggle {
  display: block;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-dark);
  cursor: pointer;
  padding: var(--space-2);
}

.nav-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  border-top: 1px solid var(--color-light);
}

.nav-menu.active {
  display: block;
}

.nav-list {
  list-style: none;
  padding: var(--space-4);
}

.nav-item {
  margin-bottom: var(--space-2);
}

.nav-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-dark);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
  background-color: var(--color-light);
  color: var(--color-primary);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(4rem, 14vh, 18vh) 0;
  overflow: hidden;
}

/* Background Layer 1: Gradient */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #2a7fff 0%, #6a4df0 100%);
  z-index: 1;
}

/* Background Layer 2: Product Image Underlay */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/leeleberd-led-lights1.jpg');
  background-size: cover;
  background-position: center bottom;
  background-repeat: no-repeat;
  opacity: 0.5;
  filter: blur(0.5px);
  mix-blend-mode: multiply;
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  margin-bottom: var(--space-6);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  letter-spacing: -0.02em;
}

.hero p {
  font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  line-height: 1.6;
  color: #fff;
  margin-bottom: var(--space-8);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  opacity: 0.95;
}

.hero .btn-group {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn {
  padding: var(--space-4) var(--space-8);
  font-size: 1.125rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-normal);
  min-width: 180px;
  text-align: center;
}

.hero .btn-primary {
  background: #19d1a3;
  color: #fff;
  border: 2px solid #19d1a3;
}

.hero .btn-primary:hover {
  background: #15b890;
  border-color: #15b890;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(25, 209, 163, 0.3);
}

.hero .btn-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

.hero .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

/* Responsive adjustments for hero */
@media (max-width: 768px) {
  .hero {
    min-height: 70vh;
    padding: clamp(3rem, 10vh, 12vh) 0;
  }
  
  .hero .btn-group {
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
  }
  
  .hero .btn {
    width: 100%;
    max-width: 280px;
    padding: var(--space-4) var(--space-6);
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: 60vh;
    padding: clamp(2rem, 8vh, 10vh) 0;
  }
  
  .hero h1 {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
  }
  
  .hero p {
    font-size: clamp(1rem, 4vw, 1.125rem);
  }
}

/* Accessibility: Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .hero .btn {
    transition: none;
  }
  
  .hero .btn:hover {
    transform: none;
  }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

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

.btn-primary:hover,
.btn-primary:focus {
  background: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

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

.card-image {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* Special styling for app interface images */
.app-interface-image {
  width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: var(--space-4);
  transition: transform var(--transition-normal);
}

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

/* Responsive adjustments for app interface images */
@media (max-width: 768px) {
  .app-interface-image {
    max-height: 350px;
    padding: var(--space-3);
  }
}

@media (max-width: 480px) {
  .app-interface-image {
    max-height: 300px;
    padding: var(--space-2);
  }
}

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

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
  color: var(--color-dark);
}

.card-text {
  color: var(--color-medium);
  margin-bottom: var(--space-4);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Sections */
.section {
  padding: var(--space-18) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-14);
}

.section-subtitle {
  text-align: center;
  color: var(--color-medium);
  font-size: 1.125rem;
  margin-bottom: var(--space-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Features */
.features {
  background: var(--color-light);
}

.feature-item {
  text-align: center;
  padding: var(--space-6);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.5rem;
}

/* Testimonials */
.testimonial {
  background: var(--color-white);
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  position: relative;
}

.testimonial::before {
  content: '"';
  font-size: 4rem;
  color: var(--color-primary);
  position: absolute;
  top: var(--space-4);
  left: var(--space-6);
  opacity: 0.3;
}

.testimonial-text {
  font-style: italic;
  margin-bottom: var(--space-6);
  font-size: 1.125rem;
}

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

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 600;
  color: var(--color-dark);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3);
  border: 2px solid var(--color-light);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-6);
  z-index: 1000;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.cookie-banner.show {
  transform: translateY(0);
}

.cookie-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  text-align: center;
}

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

.cookie-btn {
  padding: var(--space-2) var(--space-4);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.cookie-accept {
  background: var(--color-secondary);
  color: var(--color-white);
}

.cookie-decline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-white);
}

/* Footer */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-14) 0 var(--space-8);
}

.footer-content {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--color-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-medium);
  padding-top: var(--space-6);
  text-align: center;
  color: var(--color-light);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Responsive Design */
@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-6);
  }
  
  .nav-toggle {
    display: none;
  }
  
  .nav-menu {
    display: block;
    position: static;
    background: none;
    box-shadow: none;
    border: none;
  }
  
  .nav-list {
    display: flex;
    gap: var(--space-4);
    padding: 0;
  }
  
  .nav-item {
    margin-bottom: 0;
  }
  
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  
  .cookie-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  
  .footer-content {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: var(--space-24) 0;
  }
  
  .section {
    padding: var(--space-24) 0;
  }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Styles */
button:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #0000FF;
    --color-secondary: #00FF00;
    --color-accent: #800080;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .cookie-banner,
  .btn {
    display: none !important;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.4;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
}