@font-face {
  font-family: 'Rubik';
  src: url('Rubik/Rubik-VariableFont_wght.ttf') format('truetype');
}

@font-face {
  font-family: 'Rubik Italic';
  src: url('Rubik/Rubik-Italic-VariableFont_wght.ttf') format('truetype');
}

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Color Palette */
  --primary-color: #86C7FF;
  --secondary-color: #FCA4A4;
  --accent-color: #E55E5E;
  --text-primary: #FFFFFF;
  --text-secondary: #CCCCCC;
  --text-muted: #999999;
  --background-primary: #131313;
  --background-secondary: #1A1A1A;
  --border-color: #333333;
  
  /* Typography */
  --font-family: 'Rubik', sans-serif;
  --font-size-xs: clamp(12px, 1vw, 14px);
  --font-size-sm: clamp(14px, 1.2vw, 16px);
  --font-size-base: clamp(16px, 1.4vw, 18px);
  --font-size-lg: clamp(18px, 1.6vw, 20px);
  --font-size-xl: clamp(20px, 2vw, 24px);
  --font-size-2xl: clamp(24px, 2.5vw, 32px);
  --font-size-3xl: clamp(32px, 3.5vw, 48px);
  --font-size-4xl: clamp(48px, 5vw, 72px);
  --font-size-5xl: clamp(72px, 8vw, 120px);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 20px rgba(134, 199, 255, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

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

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 300;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
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);
  font-weight: 200;
}

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

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

/* ===== NAVIGATION ===== */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: rgba(19, 19, 19, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  animation: slideDown 0.6s ease-out;
}

.nav-items {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 var(--spacing-xl);
}

.logo {
  font-size: var(--font-size-lg);
  font-weight: 300;
  color: var(--secondary-color);
  transition: color var(--transition-normal);
}

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

.right-nav-items {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.right-nav-items a {
  font-size: var(--font-size-base);
  font-weight: 300;
  color: var(--text-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 4px;
  transition: all var(--transition-normal);
  position: relative;
}

.right-nav-items a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

.right-nav-items a:hover {
  color: var(--primary-color);
}

.right-nav-items a:hover::after {
  width: 100%;
}

.right-nav-items a.active {
  color: var(--primary-color);
}

.right-nav-items a.active::after {
  width: 100%;
}

/* ===== BURGER MENU ===== */
.burger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
  transition: all var(--transition-normal);
}

.burger-line {
  width: 100%;
  height: 3px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition-normal);
  transform-origin: center;
}

.burger-menu:hover .burger-line {
  background: var(--primary-color);
}

/* ===== ANIMATIONS ===== */
@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

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

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.pt-xl { padding-top: var(--spacing-xl); }
.pb-xl { padding-bottom: var(--spacing-xl); }

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .nav-items {
    padding: 0 var(--spacing-md);
  }
  
  .burger-menu {
    display: flex;
  }
  
  .right-nav-items {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(19, 19, 19, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-lg) 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-color);
  }
  
  .right-nav-items.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .right-nav-items a {
    font-size: var(--font-size-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    width: 100%;
    text-align: center;
    border-radius: 0;
  }
  
  .right-nav-items a::after {
    display: none;
  }
  
  .right-nav-items a:hover {
    background: rgba(134, 199, 255, 0.1);
  }
  
  .right-nav-items a.active {
    background: rgba(134, 199, 255, 0.2);
  }
  
  .logo {
    font-size: var(--font-size-base);
  }
  
  /* Burger menu animation */
  .burger-menu.active .burger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  
  .burger-menu.active .burger-line:nth-child(2) {
    opacity: 0;
  }
  
  .burger-menu.active .burger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }
}

@media (max-width: 480px) {
  .nav-items {
    padding: 0 var(--spacing-sm);
  }
  
  .right-nav-items {
    padding: var(--spacing-md) 0;
  }
  
  .right-nav-items a {
    font-size: var(--font-size-base);
    padding: var(--spacing-sm) var(--spacing-lg);
  }
}

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

/* Focus styles for accessibility */
a:focus,
button:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --text-secondary: #FFFFFF;
    --text-muted: #CCCCCC;
    --border-color: #FFFFFF;
  }
}