/* Palletizr Design System - Apple OS Style Guide Implementation */
/* Comprehensive design system based on Apple's OS website */

/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
  /* ==========================================================================
     Color Palette - Apple OS Style
     ========================================================================== */
  
  /* Primary Colors */
  --color-background: #FFFFFF;
  --color-background-secondary: #F5F5F7;
  --color-text-primary: #1D1D1F;
  --color-text-secondary: #6E6E73;
  --color-text-tertiary: #86868B;
  
  /* Accent Colors */
  --color-accent-primary: #FF6900;
  --color-accent-secondary: #AF52DE;
  --color-accent-tertiary: #30D158;
  
  /* OS-Specific Brand Colors */
  --color-ios: #007AFF;
  --color-macos: #FF9500;
  --color-ipados: #AF52DE;
  --color-watchos: #30D158;
  --color-visionos: #FF2D92;
  
  /* Functional Colors */
  --color-success: #30D158;
  --color-warning: #FFCC00;
  --color-error: #FF3B30;
  --color-info: #007AFF;
  
  /* Neutral Scale */
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  
  /* ==========================================================================
     Typography System - Apple SF Pro Style
     ========================================================================== */
  
  /* Font Family */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  
  /* Font Sizes - Apple Scale */
  --font-size-hero: 4.5rem;      /* 72px */
  --font-size-heading: 3rem;     /* 48px */
  --font-size-section: 2.25rem;  /* 36px */
  --font-size-subheading: 1.5rem; /* 24px */
  --font-size-body-large: 1.25rem; /* 20px */
  --font-size-body: 1rem;        /* 16px */
  --font-size-caption: 0.875rem; /* 14px */
  --font-size-small: 0.75rem;    /* 12px */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights - Apple Style */
  --line-height-hero: 1.1;
  --line-height-heading: 1.2;
  --line-height-section: 1.3;
  --line-height-subheading: 1.4;
  --line-height-body-large: 1.5;
  --line-height-body: 1.6;
  --line-height-caption: 1.5;
  --line-height-small: 1.4;
  
  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.01em;
  
  /* ==========================================================================
     Spacing System - Apple Scale
     ========================================================================== */
  
  --spacing-xxs: 0.25rem;  /* 4px */
  --spacing-xs: 0.5rem;    /* 8px */
  --spacing-s: 1rem;       /* 16px */
  --spacing-m: 1.5rem;     /* 24px */
  --spacing-l: 2rem;       /* 32px */
  --spacing-xl: 3rem;      /* 48px */
  --spacing-xxl: 4rem;     /* 64px */
  --spacing-xxxl: 5rem;    /* 80px */
  
  /* ==========================================================================
     Shadows & Elevation - Apple Style
     ========================================================================== */
  
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
  
  /* ==========================================================================
     Border Radius - Apple Style
     ========================================================================== */
  
  --radius-small: 8px;
  --radius-medium: 12px;
  --radius-large: 16px;
  --radius-xl: 24px;
  
  /* ==========================================================================
     Transitions - Apple Style
     ========================================================================== */
  
  --transition-fast: 0.2s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
  
  /* ==========================================================================
     Layout & Grid
     ========================================================================== */
  
  --container-max-width: 1200px;
  --grid-gutter: 1.5rem;
  --grid-gutter-mobile: 1rem;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-body);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Typography Classes
   ========================================================================== */

.text-hero {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-hero);
  letter-spacing: var(--letter-spacing-tight);
}

.text-heading {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  letter-spacing: var(--letter-spacing-tight);
}

.text-section {
  font-size: var(--font-size-section);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-section);
  letter-spacing: var(--letter-spacing-tight);
}

.text-subheading {
  font-size: var(--font-size-subheading);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-subheading);
}

.text-body-large {
  font-size: var(--font-size-body-large);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-body-large);
}

.text-body {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-body);
}

.text-caption {
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-caption);
  color: var(--color-text-secondary);
}

.text-small {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-small);
  color: var(--color-text-tertiary);
}

/* ==========================================================================
   Layout & Container
   ========================================================================== */

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

@media (min-width: 768px) {
  .container {
    padding: 0 var(--grid-gutter);
  }
}

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

.section-large {
  padding: calc(var(--spacing-xxxl) * 2) 0;
}

/* ==========================================================================
   Buttons & Interactive Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-medium);
  cursor: pointer;
  transition: all var(--transition-normal);
  min-height: 44px;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: #e55a00;
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

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

.btn-secondary:hover {
  background-color: #9b47c7;
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

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

.btn-tertiary:hover {
  background-color: #2bb84a;
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-gray-300);
}

.btn-outline:hover {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: var(--font-size-body-large);
  min-height: 52px;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-caption);
  min-height: 36px;
}

/* Text Links */
.link {
  color: var(--color-accent-tertiary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.link:hover {
  color: #2bb84a;
}

.link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.link:hover::after {
  transform: translateX(2px);
}

/* ==========================================================================
   Cards & Content Containers
   ========================================================================== */

.card {
  background-color: var(--color-background);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-subtle);
  padding: var(--spacing-l);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-2px);
}

.card-large {
  padding: var(--spacing-xl);
}

.card-small {
  padding: var(--spacing-m);
}

/* Feature Cards */
.feature-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-m);
  text-align: center;
}

.feature-image {
  position: relative;
  width: 100%;
  height: 200px;
  border-radius: var(--radius-medium);
  overflow: hidden;
  background: var(--color-background-secondary);
}

.feature-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.feature-card:hover .feature-img {
  transform: scale(1.05);
}

.image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.1) 0%, rgba(175, 82, 222, 0.1) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover .image-overlay {
  opacity: 1;
}

.overlay-icon {
  font-size: 2rem;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.feature-card h3 {
  margin: 0;
  color: var(--color-text-primary);
}

.feature-card p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 100;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  padding: 0 var(--grid-gutter-mobile);
}

@media (min-width: 768px) {
  .nav-container {
    padding: 0 var(--grid-gutter);
  }
}

.nav-logo {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-m);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  transition: color var(--transition-fast);
}

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

.nav-link.active {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
}

/* OS Navigation Badges */
.os-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background-color: var(--color-ios);
  color: white;
  border-radius: 20px;
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.os-badge:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-subtle);
}

.os-badge.macos {
  background-color: var(--color-macos);
}

.os-badge.ipados {
  background-color: var(--color-ipados);
}

.os-badge.watchos {
  background-color: var(--color-watchos);
}

.os-badge.visionos {
  background-color: var(--color-visionos);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: var(--spacing-xxxl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  color: white;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.hero-visualization {
  position: absolute;
  top: 50%;
  right: 5%;
  transform: translateY(-50%);
  width: 400px;
  height: 300px;
  opacity: 0.8;
  display: none;
}

@media (min-width: 1024px) {
  .hero-visualization {
    display: block;
  }
}

.container-3d {
  width: 100%;
  height: 100%;
  perspective: 1000px;
  position: relative;
}

.container-wireframe {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  animation: containerRotate 20s linear infinite;
}

.container-front,
.container-side,
.container-top {
  position: absolute;
  border: 2px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.container-front {
  width: 200px;
  height: 120px;
  bottom: 0;
  left: 0;
  transform: rotateX(90deg);
  transform-origin: top;
}

.container-side {
  width: 60px;
  height: 120px;
  bottom: 0;
  right: 0;
  transform: rotateY(-90deg) rotateX(90deg);
  transform-origin: left;
}

.container-top {
  width: 200px;
  height: 60px;
  top: 0;
  left: 0;
  transform: rotateX(60deg) translateZ(30px);
  transform-origin: bottom;
}

.cargo-stacks {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 8px;
}

.cargo-stack {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.1) 100%);
  border-radius: 4px;
  animation: cargoLoad 4s ease-in-out infinite;
}

.cargo-stack.stack-1 {
  width: 20px;
  height: 40px;
  animation-delay: 0s;
}

.cargo-stack.stack-2 {
  width: 25px;
  height: 60px;
  animation-delay: 1s;
}

.cargo-stack.stack-3 {
  width: 30px;
  height: 80px;
  animation-delay: 2s;
}

.cargo-stack.stack-4 {
  width: 18px;
  height: 50px;
  animation-delay: 3s;
}

@keyframes containerRotate {
  0% { transform: rotateY(0deg) rotateX(5deg); }
  25% { transform: rotateY(90deg) rotateX(5deg); }
  50% { transform: rotateY(180deg) rotateX(5deg); }
  75% { transform: rotateY(270deg) rotateX(5deg); }
  100% { transform: rotateY(360deg) rotateX(5deg); }
}

@keyframes cargoLoad {
  0%, 20% { height: 10px; opacity: 0.3; }
  50% { opacity: 1; }
  80%, 100% { opacity: 1; }
}

.floating-elements {
  position: absolute;
  top: 20%;
  left: 10%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.floating-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-large);
  padding: 1rem;
  box-shadow: var(--shadow-medium);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: float 6s ease-in-out infinite;
  color: var(--color-text-primary);
}

.floating-card:nth-child(2) {
  animation-delay: 3s;
}

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

.card-icon {
  font-size: 1.5rem;
}

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

.card-value {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent-primary);
  line-height: 1;
}

.card-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin: 0 0 var(--spacing-m) 0;
  color: white;
}

.hero p {
  margin: 0 0 var(--spacing-xl) 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-body-large);
  line-height: var(--line-height-body-large);
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-m);
  align-items: center;
}

@media (min-width: 640px) {
  .hero-ctas {
    flex-direction: row;
    justify-content: center;
  }
}

/* ==========================================================================
   Glassmorphism Effects
   ========================================================================== */

.glass {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-large);
}

.glass-dark {
  background: rgba(29, 29, 31, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
}

/* ==========================================================================
   Benefits Section Visual Elements
   ========================================================================== */

.benefits-visual {
  position: relative;
}

.logistics-showcase {
  position: relative;
  border-radius: var(--radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-large);
}

.showcase-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.logistics-showcase:hover .showcase-img {
  transform: scale(1.02);
}

.showcase-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.9) 0%, rgba(175, 82, 222, 0.9) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.logistics-showcase:hover .showcase-overlay {
  opacity: 1;
}

.overlay-content {
  text-align: center;
  color: white;
  padding: var(--spacing-xl);
}

/* ==========================================================================
   Testimonials Section
   ========================================================================== */

.testimonials-section {
  position: relative;
  color: white;
}

.testimonials-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

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

.bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.5) 100%);
}

.testimonials-section .container {
  position: relative;
  z-index: 2;
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-large);
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
}

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

.testimonial-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto var(--spacing-m);
  border: 3px solid rgba(255, 255, 255, 0.3);
}

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

/* ==========================================================================
   Grid Layouts
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--spacing-m);
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

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

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

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

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

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-s { margin-bottom: var(--spacing-s); }
.mb-m { margin-bottom: var(--spacing-m); }
.mb-l { margin-bottom: var(--spacing-l); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-s { margin-top: var(--spacing-s); }
.mt-m { margin-top: var(--spacing-m); }
.mt-l { margin-top: var(--spacing-l); }
.mt-xl { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-s { padding: var(--spacing-s); }
.p-m { padding: var(--spacing-m); }
.p-l { padding: var(--spacing-l); }
.p-xl { padding: var(--spacing-xl); }

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 767px) {
  .text-hero {
    font-size: 2.5rem;
  }
  
  .text-heading {
    font-size: 2rem;
  }
  
  .text-section {
    font-size: 1.75rem;
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .section-large {
    padding: var(--spacing-xxxl) 0;
  }
}

/* ==========================================================================
   Animations & Interactions
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

/* ==========================================================================
   Accessibility
   ========================================================================== */

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

/* Focus states */
.btn:focus,
.link:focus,
.nav-link:focus {
  outline: 2px solid var(--color-info);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-text-primary: #000000;
    --color-text-secondary: #333333;
    --color-background: #ffffff;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .nav,
  .btn,
  .hero-ctas {
    display: none !important;
  }
  
  body {
    color: #000000;
    background: #ffffff;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #cccccc;
  }
}