/* ============================================
   CONCEPT DELIVERY - APPLE INSPIRED DESIGN
   ============================================ */

/* Import Premium Typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================
   CSS CUSTOM PROPERTIES - DESIGN TOKENS
   ============================================ */

:root {
  /* Colors - Premium Palette */
  --color-black: #000000;
  --color-near-black: #0a0a0a;
  --color-dark-gray: #1a1a1a;
  --color-white: #ffffff;
  --color-off-white: #f5f5f7;

  /* Accent Colors - Vibrant Orange */
  --color-accent-primary: #FF6B35;
  --color-accent-secondary: #FF8C00;
  --color-accent-light: #FFA500;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #FF6B35 0%, #FF8C00 50%, #FFA500 100%);
  --gradient-dark: linear-gradient(180deg, #000000 0%, #1a1a1a 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-blur: 20px;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extra-bold: 800;
  --font-weight-black: 900;

  /* Font Sizes */
  --text-xs: 0.75rem;
  /* 12px */
  --text-sm: 0.875rem;
  /* 14px */
  --text-base: 1rem;
  /* 16px */
  --text-lg: 1.125rem;
  /* 18px */
  --text-xl: 1.25rem;
  /* 20px */
  --text-2xl: 1.5rem;
  /* 24px */
  --text-3xl: 1.875rem;
  /* 30px */
  --text-4xl: 2.25rem;
  /* 36px */
  --text-5xl: 3rem;
  /* 48px */
  --text-6xl: 3.75rem;
  /* 60px */
  --text-7xl: 4.5rem;
  /* 72px */
  --text-8xl: 6rem;
  /* 96px */

  /* Spacing */
  --space-xs: 0.5rem;
  /* 8px */
  --space-sm: 1rem;
  /* 16px */
  --space-md: 1.5rem;
  /* 24px */
  --space-lg: 2rem;
  /* 32px */
  --space-xl: 3rem;
  /* 48px */
  --space-2xl: 4rem;
  /* 64px */
  --space-3xl: 6rem;
  /* 96px */
  --space-4xl: 8rem;
  /* 128px */

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;
  --transition-slowest: 1.2s cubic-bezier(0.4, 0, 0.2, 1);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.4);

  /* Z-index layers */
  --z-base: 1;
  --z-content: 10;
  --z-nav: 100;
  --z-modal: 1000;
}

/* ============================================
   GLOBAL RESET & BASE STYLES
   ============================================ */

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

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-white);
  background: var(--color-black);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ============================================
   TYPOGRAPHY SYSTEM
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(var(--text-5xl), 8vw, var(--text-8xl));
  font-weight: var(--font-weight-black);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl));
  font-weight: var(--font-weight-extra-bold);
}

h3 {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: var(--font-weight-bold);
}

h4 {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
}

p {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
}

.text-gradient {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   GLASSMORPHISM UTILITIES
   ============================================ */

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base);
}

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

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-full {
  width: 100%;
  padding: 0;
  max-width: none;
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
}

.section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4xl) 0;
  position: relative;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-3xl) 0;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--color-accent-primary) 0%, transparent 70%);
  opacity: 0.15;
  filter: blur(100px);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.15;
  }

  50% {
    transform: translate(-50%, -50%) scale(1.2);
    opacity: 0.25;
  }
}

.hero-content {
  position: relative;
  z-index: var(--z-content);
  max-width: 1200px;
  padding: 0 var(--space-lg);
}

.hero-title {
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 1.2s ease-out forwards;
}

.hero-subtitle {
  font-size: clamp(var(--text-lg), 3vw, var(--text-2xl));
  font-weight: var(--font-weight-medium);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-2xl);
  opacity: 0;
  animation: fadeInUp 1.2s ease-out 0.3s forwards;
}

.hero-cta {
  opacity: 0;
  animation: fadeInUp 1.2s ease-out 0.6s forwards;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--gradient-hero);
  color: var(--color-white);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 107, 53, 0.6);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--glass-bg);
  border-color: var(--color-accent-primary);
}

/* ============================================
   FEATURE SECTIONS
   ============================================ */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent-primary);
  box-shadow: 0 16px 48px rgba(255, 107, 53, 0.3);
}

.feature-icon {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-lg);
  display: block;
}

.feature-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
}

.feature-description {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-slowest), transform var(--transition-slowest);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--transition-slowest), transform var(--transition-slowest);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity var(--transition-slowest), transform var(--transition-slowest);
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity var(--transition-slowest), transform var(--transition-slowest);
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideInFromLeft {
  from {
    transform: translateX(-100px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInFromRight {
  from {
    transform: translateX(100px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-md) 0;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  background: rgba(0, 0, 0, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-link {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

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

@media (max-width: 768px) {
  .nav-links {
    gap: var(--space-md);
  }
}

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

.footer {
  background: var(--color-near-black);
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-text {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-sm);
}

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

@media (max-width: 1024px) {
  :root {
    --space-4xl: 6rem;
    --space-3xl: 4rem;
  }
}

@media (max-width: 768px) {
  :root {
    --space-4xl: 4rem;
    --space-3xl: 3rem;
    --space-2xl: 2.5rem;
  }

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

@media (max-width: 480px) {
  :root {
    --space-4xl: 3rem;
    --space-3xl: 2rem;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

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

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

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

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

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

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

.mb-sm {
  margin-bottom: var(--space-sm);
}

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

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

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

.opacity-70 {
  opacity: 0.7;
}

.opacity-80 {
  opacity: 0.8;
}

.opacity-90 {
  opacity: 0.9;
}

/* ============================================
   THEME VARIANTS
   ============================================ */

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

.bg-orange-landscape {
  background: 
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 60%),
    linear-gradient(120deg, #ff6b35, #ff8c00, #ff4500, #ff6b35);
  background-size: 200% 200%;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
  animation: gradientShift 15s ease infinite;
}

.bg-orange-landscape::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
  animation: reflectionMove 20s linear infinite;
  pointer-events: none;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes reflectionMove {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(20%, 20%) rotate(360deg); }
}

.bg-orange-landscape .glass-card {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.bg-white h1,
.bg-white h2,
.bg-white h3,
.bg-white h4,
.bg-white h5,
.bg-white h6 {
  color: var(--color-black);
}

.bg-white p {
  color: rgba(0, 0, 0, 0.75);
}

.bg-white .glass-card {
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.bg-white .storyboard-frame {
  background: #f0f0f0;
  border-color: rgba(0, 0, 0, 0.1);
}

.bg-white .storyboard-frame .frame-number {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-black);
}

.bg-white .storyboard-frame .frame-caption {
  background: linear-gradient(to top, rgba(255, 255, 255, 0.95), transparent);
  color: var(--color-black);
}

.bg-orange-subtle {
  background: radial-gradient(circle at 50% 50%, rgba(255, 107, 53, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
  position: relative;
}

/* ============================================
   NEW SECTION STYLES (PHASE 2)
   ============================================ */

/* Rationale Section */
.quote-large {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  text-align: center;
  max-width: 1000px;
  margin: 0 auto;
}

/* Zigzag Layout (Storyline) */
.zigzag-layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-4xl);
}

.zigzag-item {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}

.zigzag-item:nth-child(even) {
  flex-direction: row-reverse;
}

.zigzag-content {
  flex: 1;
}

.zigzag-image {
  flex: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.zigzag-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-slow);
}

.zigzag-image:hover img {
  transform: scale(1.05);
}

@media (max-width: 768px) {

  .zigzag-item,
  .zigzag-item:nth-child(even) {
    flex-direction: column;
    gap: var(--space-lg);
  }
}

/* Storyboard Grid */
.storyboard-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  width: 100%;
}

.storyboard-placeholder {
  width: 100%;
  height: 100%;
  background: #1a1a1a;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 500;
}

@media (max-width: 900px) {
  .storyboard-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 600px) {
  .storyboard-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.storyboard-frame {
  background: var(--color-dark-gray);
  border-radius: 0;
  overflow: hidden;
  position: relative;
  aspect-ratio: 16/9;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: border-color var(--transition-base);
}

.storyboard-frame:hover {
  border-color: var(--color-accent-primary);
}

.frame-number {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.7);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: var(--text-xs);
  font-weight: bold;
  backdrop-filter: blur(4px);
}

.frame-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
  padding: 20px 10px 10px;
  font-size: var(--text-sm);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.storyboard-frame:hover .frame-caption {
  transform: translateY(0);
}

/* Video Reference Grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  padding: 0 var(--space-md);
}

@media (max-width: 900px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
}

.video-card {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  group: video-card;
}

.video-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
}

.video-card:hover .video-overlay {
  background: rgba(0, 0, 0, 0.1);
}

.play-icon {
  font-size: var(--text-4xl);
  opacity: 0.8;
  transition: transform var(--transition-base);
}

.video-card:hover .play-icon {
  transform: scale(1.2);
  opacity: 1;
}

/* Target Audience / Personas */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.persona-card {
  padding: var(--space-2xl);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  text-align: left;
}

.persona-metric {
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-black);
  color: var(--color-accent-primary);
  display: block;
  margin-bottom: var(--space-xs);
}

.persona-label {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-lg);
  display: block;
}

/* Fullscreen Immersive Scenes */
.scene-section {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: var(--space-3xl);
  overflow: hidden;
}

.scene-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.scene-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.scene-content {
  max-width: 600px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(20px);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}