/* ================================================
   Portfolio Website - Main Stylesheet
   Design: Apple + Web3 + Minimalism + Aero Glass
   ================================================ */

/* ================================================
   CSS VARIABLES & DESIGN TOKENS
   ================================================ */
:root {
  /* Typography - Apple inspired */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Font Sizes - Fluid Typography */
  --font-size-xs: clamp(0.75rem, 0.5vw + 0.65rem, 0.85rem);
  --font-size-sm: clamp(0.875rem, 0.6vw + 0.75rem, 1rem);
  --font-size-base: clamp(1rem, 0.8vw + 0.85rem, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1vw + 0.95rem, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.2vw + 1.05rem, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.8vw + 1.2rem, 2rem);
  --font-size-3xl: clamp(2rem, 2.5vw + 1.5rem, 3rem);
  --font-size-4xl: clamp(2.5rem, 3.5vw + 2rem, 4rem);
  --font-size-5xl: clamp(3rem, 5vw + 2.5rem, 6rem);
  
  /* Spacing System */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --content-max-width: 800px;
  --nav-height: 80px;
  --section-padding: var(--spacing-4xl);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Glass Morphism */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --glass-backdrop: blur(8px) saturate(180%);
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.25s ease-out;
  --transition-slow: 0.35s ease-out;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* ================================================
   LIGHT THEME COLORS
   ================================================ */
:root {
  /* Base Colors */
  --color-white: #ffffff;
  --color-black: #000000;
  
  /* Gray 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;
  
  /* Web3 Inspired Colors */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;
  
  --color-secondary-50: #faf5ff;
  --color-secondary-100: #f3e8ff;
  --color-secondary-200: #e9d5ff;
  --color-secondary-300: #d8b4fe;
  --color-secondary-400: #c084fc;
  --color-secondary-500: #a855f7;
  --color-secondary-600: #9333ea;
  --color-secondary-700: #7c3aed;
  --color-secondary-800: #6b21a8;
  --color-secondary-900: #581c87;
  
  --color-accent-50: #ecfdf5;
  --color-accent-100: #d1fae5;
  --color-accent-200: #a7f3d0;
  --color-accent-300: #6ee7b7;
  --color-accent-400: #34d399;
  --color-accent-500: #10b981;
  --color-accent-600: #059669;
  --color-accent-700: #047857;
  --color-accent-800: #065f46;
  --color-accent-900: #064e3b;
  
  /* Semantic Colors */
  --color-background: var(--color-gray-50);
  --color-surface: var(--color-white);
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-muted: var(--color-gray-500);
  --color-border: var(--color-gray-200);
  --color-border-light: var(--color-gray-100);
  
  /* Interactive Elements */
  --color-primary: var(--color-primary-600);
  --color-primary-hover: var(--color-primary-700);
  --color-secondary: var(--color-secondary-600);
  --color-secondary-hover: var(--color-secondary-700);
  --color-accent: var(--color-accent-500);
  --color-accent-hover: var(--color-accent-600);
}

/* ================================================
   RESET & BASE STYLES
   ================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  overflow-x: hidden;
}

/* ================================================
   TYPOGRAPHY
   ================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

a:hover {
  color: var(--color-primary-hover);
}

strong {
  font-weight: var(--font-weight-semibold);
}

/* ================================================
   GLASS MORPHISM COMPONENTS
   ================================================ */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  padding: var(--spacing-xl);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
}

/* ================================================
   THEME TOGGLE
   ================================================ */
.theme-toggle {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 50px;
  height: 50px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
}

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

/* ================================================
   NAVIGATION
   ================================================ */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-bottom: 1px solid var(--glass-border);
  z-index: var(--z-sticky);
}

.nav-content {
  max-width: var(--container-max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
}

.nav-logo {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.1);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 20px;
  height: 2px;
  background: var(--color-text-primary);
  margin: 2px 0;
  transition: var(--transition-fast);
}

/* ================================================
   MAIN LAYOUT
   ================================================ */
.main-container {
  margin-top: var(--nav-height);
  min-height: calc(100vh - var(--nav-height));
}

/* ================================================
   PAGE HEADERS
   ================================================ */
.page-header {
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg) var(--spacing-3xl);
  position: relative;
  overflow: hidden;
}

.page-title {
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-secondary-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ================================================
   HERO SECTION
   ================================================ */
.hero-section {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-xl);
}

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

.hero-content {
  max-width: var(--content-max-width);
  text-align: center;
  z-index: 1;
}

.hero-name {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.name-part {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-secondary-600), var(--color-accent-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease-out;
}

.name-part:nth-child(2) {
  animation-delay: 0.2s;
}

.hero-tagline {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-intro {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

/* ================================================
   BUTTONS
   ================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
  color: white;
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  color: white;
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  color: var(--color-text-primary);
}

.btn-tertiary {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-tertiary:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-lg);
}

.btn-ghost:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
}

.btn-icon {
  width: 16px;
  height: 16px;
}

/* ================================================
   SCROLL INDICATOR
   ================================================ */
.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  animation: bounce 2s infinite;
}

.scroll-arrow {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-lg);
}

/* ================================================
   PARTICLES ANIMATION
   ================================================ */
.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: -1;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-secondary-400));
  opacity: 0.1;
  animation: float 6s ease-in-out infinite;
  filter: blur(40px);
}

.orb-1 {
  width: 200px;
  height: 200px;
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.orb-2 {
  width: 300px;
  height: 300px;
  top: 60%;
  right: 10%;
  animation-delay: 2s;
}

.orb-3 {
  width: 150px;
  height: 150px;
  bottom: 20%;
  left: 50%;
  animation-delay: 4s;
}

/* ================================================
   INTERACTIVE SECTION
   ================================================ */
.interactive-section {
  padding: var(--spacing-4xl) var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.floating-card {
  animation: fadeInUp 0.6s ease-out;
  transition: transform var(--transition-normal);
}

.floating-card:hover {
  transform: translateY(-5px);
}

.floating-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.floating-card p {
  margin-bottom: var(--spacing-lg);
}

.card-link {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-fast);
}

.card-link:hover {
  color: var(--color-primary-hover);
  transform: translateX(5px);
}

/* ================================================
   FOOTER
   ================================================ */
.footer {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-2xl) var(--spacing-lg);
  margin-top: var(--spacing-4xl);
}

.footer-content {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

/* ================================================
   ANIMATIONS
   ================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes float {
  0%, 100% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-20px) scale(1.05);
  }
}

/* ================================================
   RESPONSIVE DESIGN
   ================================================ */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .interactive-section {
    grid-template-columns: 1fr;
    padding: var(--spacing-2xl) var(--spacing-lg);
  }
  
  .footer-content {
    text-align: center;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .nav-content {
    padding: 0 var(--spacing-md);
  }
  
  .theme-toggle {
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
  }
  
  .hero-section {
    padding: var(--spacing-lg);
  }
  
  .glass-card {
    padding: var(--spacing-lg);
  }
}