/* Apple-Inspired Design System - Enhanced */
:root {
  /* Typography - Premium system fonts */
  --font-primary: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Oxygen, Ubuntu, "Helvetica Neue", Arial, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Menlo, monospace;
  
  /* Enhanced Color System */
  --color-black: #1d1d1f;
  --color-white: #ffffff;
  --color-gray-100: #f5f5f7;
  --color-gray-200: #e8e8ed;
  --color-gray-300: #d2d2d7;
  --color-gray-400: #86868b;
  --color-gray-500: #515154;
  --color-gray-600: #2c2c2e;
  --color-gray-700: #1c1c1e;
  
  /* Premium Accent Palette */
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-accent-light: rgba(0, 113, 227, 0.1);
  --color-accent-glow: rgba(0, 113, 227, 0.4);
  --color-secondary: #5e5ce6;
  --color-secondary-light: rgba(94, 92, 230, 0.1);
  --color-tertiary: #32ade6;
  --color-success: #30d158;
  --color-warning: #ff9f0a;
  --color-error: #ff3b30;
  
  /* Premium Gradients */
  --gradient-hero: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
  --gradient-card: linear-gradient(145deg, #ffffff, #f5f5f7);
  --gradient-dark: linear-gradient(180deg, #1d1d1f 0%, #2c2c2e 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  --gradient-mesh: radial-gradient(at 30% 30%, var(--color-accent-light) 0%, transparent 50%),
                   radial-gradient(at 70% 70%, var(--color-secondary-light) 0%, transparent 50%),
                   radial-gradient(at 50% 50%, var(--color-tertiary) 0%, transparent 70%);
  --gradient-glow: radial-gradient(circle at center, var(--color-accent-glow) 0%, transparent 70%);
  
  /* Spacing - More generous for Apple aesthetic */
  --space-xs: 0.8rem;
  --space-sm: 1.6rem;
  --space-md: 3.2rem;
  --space-lg: 4.8rem;
  --space-xl: 8rem;
  --space-2xl: 12rem;
  --space-3xl: 16rem;
  --space-4xl: 24rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-pill: 50rem;
  
  /* Shadows - Simplified to 3 levels */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 48px rgba(0,0,0,0.12);
  --shadow-card: var(--shadow-sm);
  --shadow-hover: var(--shadow-md);
  --shadow-xl: var(--shadow-lg);
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Blur effects */
  --blur-sm: blur(8px);
  --blur-md: blur(16px);
  --blur-lg: blur(24px);
  --blur-navbar: saturate(180%) blur(20px);
}

/* Dark mode variables */
@media (prefers-color-scheme: dark) {
  :root {
    --color-black: #ffffff;
    --color-white: #1d1d1f;
    --color-gray-100: #2c2c2e;
    --color-gray-200: #3a3a3c;
    --color-gray-300: #48484a;
    --color-gray-400: #98989d;
    --color-gray-500: #aeaeb2;
    --color-gray-600: #e8e8ed;
    --color-accent: #2997ff;
    --color-accent-hover: #4da8ff;
  }
}

/* Premium Glassmorphism Effects */
.glass {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 0 1px 0 rgba(0,0,0,0.04),
              inset 0 0 30px rgba(255, 255, 255, 0.1);
}

.glass-premium {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.6));
  backdrop-filter: saturate(200%) blur(30px);
  -webkit-backdrop-filter: saturate(200%) blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 0 1px 0 rgba(0,0,0,0.04),
              0 20px 40px rgba(0,0,0,0.08),
              inset 0 0 40px rgba(255, 255, 255, 0.2);
}

.glass-dark {
  background: rgba(29, 29, 31, 0.7);
  backdrop-filter: var(--blur-navbar);
  -webkit-backdrop-filter: var(--blur-navbar);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Morphing blob animation */
@keyframes morph {
  0% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
  50% {
    border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
  }
  100% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
}

.morph-blob {
  animation: morph 8s ease-in-out infinite;
  background: linear-gradient(45deg, var(--color-accent), #32ade6);
  position: absolute;
  width: 500px;
  height: 500px;
  z-index: -1;
  opacity: 0.5;
  filter: blur(40px);
}

/* Enhanced Smooth Scroll Animation Classes */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

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

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

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

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

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

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

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

/* Smooth Scrolling Performance Enhancements */
.smooth-scroll-container {
  -webkit-overflow-scrolling: touch; /* iOS momentum scrolling */
  overflow-y: auto;
  overscroll-behavior-y: contain; /* Prevent scroll chaining */
}

/* Optimized Parallax Effects */
.parallax-layer {
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.parallax-bg {
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.parallax-fg {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Scroll-triggered Animations with Better Performance */
[data-scroll] {
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

[data-scroll="in"] {
  opacity: 1;
  transform: translateY(0);
}

[data-scroll="out"] {
  opacity: 0;
  transform: translateY(20px);
}

/* Smooth Section Transitions */
section {
  scroll-margin-top: 65px; /* Account for fixed header */
}

/* Enhanced Scroll Snap */
@supports (scroll-snap-type: y proximity) {
  .scroll-snap-wrapper {
    scroll-snap-type: y proximity;
    scroll-padding-top: 65px;
  }
  
  .scroll-snap-item {
    scroll-snap-align: start;
    scroll-snap-stop: normal;
  }
}

/* Buttery Smooth Hover Effects */
.smooth-hover {
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

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

/* Natural Easing Functions */
.ease-natural {
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.ease-smooth {
  transition-timing-function: cubic-bezier(0.4, 0, 0.6, 1);
}

.ease-spring {
  transition-timing-function: var(--transition-spring);
}

/* 3D Card effect */
.card-3d {
  transform-style: preserve-3d;
  transition: transform var(--transition-base);
}

.card-3d:hover {
  transform: perspective(1000px) rotateY(5deg) rotateX(5deg) translateZ(20px);
}

/* Enhanced Apple-style button with magnetic effect */
.btn-apple {
  background: var(--color-accent);
  color: white;
  padding: 14px 28px;
  border-radius: 980px;
  border: none;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  will-change: transform;
}

.btn-apple:hover {
  background: var(--color-accent-hover);
  transform: scale(1.015) translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 113, 227, 0.2);
}

.btn-apple:active {
  transform: scale(0.985);
}

.btn-apple.magnetic {
  transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Floating labels for forms */
.form-field {
  position: relative;
  margin-bottom: var(--space-lg);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 20px 16px 8px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-size: 17px;
  transition: all var(--transition-fast);
  font-family: var(--font-primary);
}

.form-field label {
  position: absolute;
  left: 16px;
  top: 16px;
  color: var(--color-gray-400);
  font-size: 17px;
  transition: all var(--transition-fast);
  pointer-events: none;
  background: var(--color-white);
  padding: 0 4px;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field input:not(:placeholder-shown),
.form-field textarea:not(:placeholder-shown) {
  border-color: var(--color-accent);
  outline: none;
}

.form-field input:focus + label,
.form-field textarea:focus + label,
.form-field input:not(:placeholder-shown) + label,
.form-field textarea:not(:placeholder-shown) + label {
  top: -8px;
  font-size: 13px;
  color: var(--color-accent);
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Interactive Element Styles */
.interactive-card {
  transform-style: preserve-3d;
  transition: all var(--transition-base);
  will-change: transform;
}

.interactive-card:hover {
  transform: perspective(1000px) rotateX(5deg) rotateY(5deg) translateZ(20px);
}

/* Gradient Orb Styles */
.gradient-orb {
  position: absolute;
  width: 600px;
  height: 600px;
  background: var(--gradient-mesh);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.7;
  pointer-events: none;
  will-change: transform;
  animation: orbFloat 8s ease-in-out infinite;
}

@keyframes orbFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

/* Premium Button Styles */
.btn-premium {
  background: var(--gradient-accent);
  color: white;
  padding: 16px 32px;
  border-radius: 980px;
  border: none;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 113, 227, 0.2);
}

.btn-premium::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-premium:hover::before {
  width: 300px;
  height: 300px;
}

.btn-premium:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 113, 227, 0.3);
}

/* Smooth Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 50px;
  border: 2px solid var(--color-accent);
  border-radius: 25px;
  opacity: 0.7;
  transition: opacity var(--transition-base);
}

.scroll-indicator::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(10px); }
  60% { transform: translateX(-50%) translateY(5px); }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .gradient-orb {
    animation: none;
  }
  
  .interactive-card:hover {
    transform: none;
  }
}