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

    :root {
      --primary-color: #60a5fa;
      --accent-color: #3b82f6;
      --secondary-color: #21283a;
      --text-light: #f8fafc;
      --text-dark: #0f172a;
      --bg-dark: #21283a;
      --bg-darker: #141821;
      --glass-bg: rgba(59, 130, 246, 0.1);
      --glass-border: rgba(59, 130, 246, 0.2);
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
      color: var(--text-light);
      overflow-x: hidden;
      line-height: 1.6;
      min-height: 100vh;
    }

    /* Animated background particles */
    .particles {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 1;
    }

    .particle {
      position: absolute;
      width: 2px;
      height: 2px;
      background: var(--accent-color);
      border-radius: 50%;
      animation: float 20s infinite linear;
      opacity: 0.3;
    }

    @keyframes float {
      0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
      10% { opacity: 0.3; }
      90% { opacity: 0.3; }
      100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
    }

    /* Header */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      backdrop-filter: blur(20px);
      background: rgba(15, 15, 35, 0.8);
      border-bottom: 1px solid var(--glass-border);
      transition: all 0.3s ease;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 2rem;
      max-width: 1400px;
      margin: 0 auto;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    .logo:hover {
      transform: scale(1.05);
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 0;
      align-items: center;
      background: rgba(33, 40, 58, 0.8);
      backdrop-filter: blur(15px);
      border-radius: 50px;
      padding: 0.5rem;
      border: 1px solid var(--glass-border);
    }

    .nav-link {
      color: var(--text-light);
      text-decoration: none;
      padding: 0.75rem 1.5rem;
      border-radius: 25px;
      transition: all 0.3s ease;
      position: relative;
      font-weight: 500;
      letter-spacing: 0.5px;
      font-size: 0.9rem;
      white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--bg-dark);
      background: var(--accent-color);
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(29, 229, 255, 0.4);
    }

    /* Menu hamburger */
    .menu-toggle {
      display: none;
      flex-direction: column;
      cursor: pointer;
      z-index: 1001;
      background: none;
      border: none;
      padding: 0.5rem;
    }

    .hamburger {
      width: 25px;
      height: 3px;
      background: var(--text-light);
      margin: 3px 0;
      transition: all 0.3s ease;
      border-radius: 3px;
    }

    .menu-toggle.active .hamburger:nth-child(1) {
      transform: rotate(-45deg) translate(-5px, 6px);
    }

    .menu-toggle.active .hamburger:nth-child(2) {
      opacity: 0;
    }

    .menu-toggle.active .hamburger:nth-child(3) {
      transform: rotate(45deg) translate(-5px, -6px);
    }

    /* Main Content */
    .main-content {
      padding-top: 100px;
      min-height: 100vh;
      position: relative;
      z-index: 10;
    }

    /* Hero Section */
    .hero-studies {
      padding: 4rem 2rem 2rem;
      display: flex;
      align-items: center;
      min-height: 50vh;
    }

    .hero-studies-container {
      max-width: 1400px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 400px;
      gap: 4rem;
      align-items: center;
    }

    .hero-studies-content {
      animation: slideInLeft 1s ease-out;
    }

    .hero-studies-title {
      font-size: 1.2rem;
      color: var(--accent-color);
      margin-bottom: 1rem;
      font-weight: 500;
    }

    .hero-studies-name {
      font-size: clamp(2.5rem, 6vw, 4rem);
      font-weight: 800;
      margin-bottom: 1rem;
      background: linear-gradient(135deg, var(--text-light), var(--primary-color));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }

    .hero-studies-subtitle {
      font-size: 1.5rem;
      color: rgba(248, 250, 252, 0.8);
      margin-bottom: 2rem;
      font-weight: 300;
    }

    .hero-studies-description {
      font-size: 1.1rem;
      color: rgba(248, 250, 252, 0.8);
      margin-bottom: 2rem;
      line-height: 1.8;
    }

    .section-link {
      color: var(--accent-color);
      text-decoration: none;
      transition: all 0.3s ease;
      position: relative;
    }

    .section-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-color);
      transition: width 0.3s ease;
    }

    .section-link:hover::after {
      width: 100%;
    }

    .hero-studies-visual {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
      animation: slideInRight 1s ease-out;
    }

    .hero-studies-image {
      width: 350px;
      height: 350px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      animation: pulse 4s ease-in-out infinite;
    }

    .hero-studies-image::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: linear-gradient(45deg, transparent, rgba(29, 229, 255, 0.1), transparent);
      animation: rotate 3s linear infinite;
    }

    /* Timeline Section */
    .timeline-section {
      padding: 4rem 2rem;
      position: relative;
      z-index: 10;
    }

    .section-container {
      max-width: 1400px;
      margin: 0 auto;
    }

    .timeline {
      position: relative;
      max-width: 1000px;
      margin: 0 auto;
    }

    .timeline::before {
      content: '';
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 3px;
      background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
      transform: translateX(-50%);
      border-radius: 3px;
    }

    .timeline-item {
      position: relative;
      margin: 3rem 0;
      animation: fadeInUp 0.6s ease-out;
    }

    .timeline-item:nth-child(even) {
      animation-delay: 0.2s;
    }

    .timeline-item:nth-child(odd) .timeline-content {
      margin-left: 0;
      margin-right: 50%;
      padding-right: 2rem;
    }

    .timeline-item:nth-child(even) .timeline-content {
      margin-left: 50%;
      margin-right: 0;
      padding-left: 2rem;
    }

    .timeline-content {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 1.5rem;
      padding: 2rem;
      position: relative;
      transition: all 0.3s ease;
    }

    .timeline-content:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 40px rgba(29, 229, 255, 0.2);
      border-color: var(--accent-color);
    }

    .timeline-dot {
      position: absolute;
      left: 50%;
      top: 2rem;
      width: 20px;
      height: 20px;
      background: var(--accent-color);
      border-radius: 50%;
      transform: translateX(-50%);
      z-index: 2;
      box-shadow: 0 0 20px rgba(29, 229, 255, 0.5);
    }

    .timeline-content h4 {
      font-size: 1.5rem;
      color: var(--accent-color);
      margin-bottom: 0.5rem;
      font-weight: 700;
    }

    .timeline-content p {
      color: rgba(248, 250, 252, 0.8);
      margin-bottom: 1rem;
      line-height: 1.6;
    }

    .timeline-content p:last-of-type {
      margin-bottom: 1.5rem;
    }

    .timeline-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .timeline-btn {
      background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
      border: none;
      padding: 0.75rem 1.5rem;
      border-radius: 25px;
      font-weight: 500;
      text-decoration: none;
      color: var(--bg-dark);
      transition: all 0.3s ease;
      display: inline-block;
      font-size: 0.9rem;
    }

    .timeline-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(29, 229, 255, 0.4);
      text-decoration: none;
      color: var(--bg-dark);
    }

    /* Footer */
    .footer {
      padding: 2rem;
      text-align: center;
      background: var(--bg-darker);
      border-top: 1px solid var(--glass-border);
      position: relative;
      z-index: 10;
    }

    /* Animations */
    @keyframes slideInLeft {
      0% { opacity: 0; transform: translateX(-50px); }
      100% { opacity: 1; transform: translateX(0); }
    }

    @keyframes slideInRight {
      0% { opacity: 0; transform: translateX(50px); }
      100% { opacity: 1; transform: translateX(0); }
    }

    @keyframes pulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.05); }
    }

    @keyframes rotate {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    @keyframes fadeInUp {
      0% { opacity: 0; transform: translateY(30px); }
      100% { opacity: 1; transform: translateY(0); }
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
      .hero-studies-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
      }
      
      .hero-studies-visual {
        order: -1;
      }
      
      .hero-studies-image {
        width: 300px;
        height: 300px;
      }
      
      .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(21, 24, 33, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem 0;
        border-radius: 0;
        border-top: 1px solid var(--glass-border);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
      }
      
      .nav-menu.active {
        display: flex;
      }

      .nav-link {
        padding: 0.25rem 1.5rem;
        margin: 0;
        border-radius: 0;
        border-bottom: 1px solid rgba(59, 130, 246, 0.1);
        width: 100%;
        text-align: center;
      }

      .nav-link:last-child {
        border-bottom: none;
      }

      .nav-link:hover {
        background: rgba(59, 130, 246, 0.15);
        color: var(--text-light);
        transform: none;
        box-shadow: none;
      }

      .nav-link.active {
        background: linear-gradient(90deg, rgba(59, 130, 246, 0.4), rgba(59, 130, 246, 0.2));
        color: var(--primary-color);
        font-weight: 600;
        border-left: 3px solid var(--accent-color);
        transform: none;
        box-shadow: none;
        position: relative;
      }
      
      .menu-toggle {
        display: flex;
      }

      .timeline::before {
        left: 2rem;
      }

      .timeline-item:nth-child(odd) .timeline-content,
      .timeline-item:nth-child(even) .timeline-content {
        margin-left: 4rem;
        margin-right: 0;
        padding-left: 2rem;
        padding-right: 2rem;
      }

      .timeline-dot {
        left: 2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-container {
        padding: 1rem;
      }
      
      .hero-studies {
        padding: 2rem 1rem;
      }
      
      .timeline-section {
        padding: 2rem 1rem;
      }
      
      .hero-studies-image {
        width: 250px;
        height: 250px;
      }

      .timeline-buttons {
        flex-direction: column;
        gap: 0.5rem;
      }

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

    @media (max-width: 480px) {
      .hero-studies-name {
        font-size: 2rem;
      }
      
      .hero-studies-subtitle {
        font-size: 1.2rem;
      }
      
      .hero-studies-image {
        width: 200px;
        height: 200px;
      }

      .timeline-content {
        padding: 1.5rem;
      }

      .timeline-item:nth-child(odd) .timeline-content,
      .timeline-item:nth-child(even) .timeline-content {
        margin-left: 3rem;
      }

      .timeline::before {
        left: 1.5rem;
      }

      .timeline-dot {
        left: 1.5rem;
      }
    }