@font-face {
    font-family: 'jostbold';
    src: url('jost.bold-webfont.woff2') format('woff2'),
         url('jost.bold-webfont.woff') format('woff');
    font-weight: normal;
    font-style: normal;
  }
  
  :root {
    --deep-purple: #4A148C;
    --soft-purple: #7B1FA2;
    --light-purple: #BA68C8;
    --pale-cyan: #80DEEA;
    --warm-gray: #ECEFF1;
  }
  
  body.retro-80s-style {
    font-family: 'jostbold', sans-serif;
    background: 
      linear-gradient(to bottom, #0F0C29 0%, #2A0845 100%);
    color: var(--warm-gray);
    line-height: 1.6;
  }
  
  .retro-title {
    font-family: 'jostbold', sans-serif;
    color: var(--warm-gray);
    text-shadow: 
      2px 2px 0 rgba(74, 20, 140, 0.5),
      4px 4px 0 rgba(123, 31, 162, 0.3);
    position: relative;
    letter-spacing: 2px;
  }
  
  .retro-title:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(to right, 
      transparent, 
      var(--pale-cyan), 
      transparent);
  }
  
  .retro-subtitle {
    font-family: 'jostbold', sans-serif;
    color: var(--light-purple);
    position: relative;
    display: inline-block;
    padding: 0 15px;
  }
  
  .retro-button-80s,
  .retro-button-90s,
  .retro-button-2000s,
  .retro-link {
    font-family: 'jostbold', sans-serif;
    transition: all 0.3s ease;
  }
  
  .retro-button-80s {
    border: 2px solid var(--light-purple);
    background: rgba(74, 20, 140, 0.2);
    color: var(--warm-gray);
    padding: 8px 20px;
    position: relative;
  }
  
  .retro-button-80s:hover {
    background: rgba(74, 20, 140, 0.4);
    box-shadow: 0 0 10px rgba(186, 104, 200, 0.3);
  }
  
  .retro-button-90s {
    background: transparent;
    color: var(--light-purple);
    border-bottom: 2px solid var(--pale-cyan);
    padding: 6px 0;
  }
  
  .retro-button-90s:hover {
    letter-spacing: 1px;
    color: var(--pale-cyan);
  }
  
  .retro-button-2000s {
    background: rgba(128, 222, 234, 0.1);
    color: var(--pale-cyan);
    border: 1px solid var(--pale-cyan);
    padding: 8px 20px;
  }
  
  .retro-button-2000s:hover {
    background: rgba(128, 222, 234, 0.2);
    letter-spacing: 1px;
  }
  
  .retro-link {
    color: var(--light-purple) !important;
    text-decoration: none;
    position: relative;
  }
  
  .retro-link:before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--pale-cyan);
    transition: width 0.3s ease;
  }
  
  .retro-link:hover:before {
    width: 100%;
  }
  
  .retro-footer {
    font-family: 'jostbold', sans-serif;
    border-top: 1px solid rgba(186, 104, 200, 0.3);
    background: rgba(15, 23, 42, 0.3);
    position: relative;
  }
  
  .retro-footer:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
      to right,
      transparent,
      var(--pale-cyan),
      transparent
    );
  }
  
  .grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
      linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.5;
  }
  
  .grid-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
      linear-gradient(rgba(128, 222, 234, 0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(128, 222, 234, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
  }
  
  .nav-link {
    display: block;
    padding: 8px 16px;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
    text-transform: capitalize;
    transition: color 0.3s ease, background-color 0.3s ease;
  }
  
  .nav-link.start { color: #9b4d96; }
  .nav-link.about { color: #f472b6; }
  .nav-link.contacts { color: #06b6d4; }
  .nav-link.projects { color: #f59e0b; }
  .nav-link.thanks { color: #6366f1; }
  
  .nav-link:hover {
    color: #ffffff;
  }
  
  .mobile-link {
    font-size: 1rem;
    font-weight: 500;
    text-transform: capitalize;
    transition: color 0.3s ease, background-color 0.3s ease;
  }
  
  .mobile-link.start { color: #9b4d96; }
  .mobile-link.about { color: #f472b6; }
  .mobile-link.contacts { color: #06b6d4; }
  .mobile-link.projects { color: #f59e0b; }
  .mobile-link.thanks { color: #6366f1; }
  
  .mobile-link:hover {
    color: #333333;
    background-color: #ffffff;
  }
  
  .nav-link span, .mobile-link span {
      text-transform: lowercase !important;
  }
  
  .nav-highlight {
    position: relative;
  }
  
  .nav-highlight ::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: #8b5cf6;
    border-radius: 50%;
    transition: all 0.3s ease;
    opacity: 0;
  }
  .nav-highlight:hover::after {
    opacity: 1;
    bottom: -6px;
  }
  .active-nav::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #8b5cf6, #6366f1);
    opacity: 1;
    transition: all 0.3s ease;
  }
  .nav-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .nav-item:hover {
    transform: translateY(-2px);
  }
  #mobile-menu {
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform: translateY(-10px);
    opacity: 0;
  }
  #mobile-menu:not(.hidden) {
    transform: translateY(0);
    opacity: 1;
  }