:root {
      --primary: #00c8c0;
      --accent: #ff5ca2;
      --dark: #0f0f0f;
      --light: #ffffff;
      --text-dark: #1a1a1a;
      --text-light: #f0f0f0;
      --bg-light: #f8fafc;
      --bg-dark: #1a1a1a;
      --card-light: #ffffff;
      --card-dark: #252525;
      --border-light: #e2e8f0;
      --border-dark: #374151;
      --shadow-light: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
      --shadow-dark: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
      --gradient-primary: linear-gradient(135deg, var(--primary), #00a8a0);
      --gradient-accent: linear-gradient(135deg, var(--accent), #e04888);
      --gradient-mixed: linear-gradient(135deg, var(--accent), var(--primary));
      --gradient-hero: linear-gradient(135deg, rgba(0, 200, 192, 0.1), rgba(255, 92, 162, 0.1));
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Poppins', sans-serif;
      background: var(--bg-light);
      color: var(--text-dark);
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    body.dark-mode {
      background: var(--bg-dark);
      color: var(--text-light);
    }

    /* Header Styles */
    header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1.5rem 2rem;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-light);
      position: sticky;
      top: 0;
      z-index: 100;
      transition: all 0.3s ease;
    }

    body.dark-mode header {
      background: rgba(26, 26, 26, 0.95);
      border-bottom-color: var(--border-dark);
    }

    .logo img {
      height: 60px;
      transition: transform 0.3s ease;
    }

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

    .header-controls {
      display: flex;
      gap: 1rem;
      align-items: center;
    }

    .toggle-lang, .toggle-mode {
      background: var(--gradient-mixed);
      color: white;
      border: none;
      padding: 0.75rem 1.5rem;
      border-radius: 25px;
      cursor: pointer;
      font-weight: 500;
      font-size: 0.9rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: var(--shadow-light);
    }

    body.dark-mode .toggle-lang, 
    body.dark-mode .toggle-mode {
      box-shadow: var(--shadow-dark);
    }

    .toggle-lang:hover, .toggle-mode:hover {
      transform: translateY(-2px) scale(1.05);
      box-shadow: 0 12px 25px -5px rgba(255, 92, 162, 0.4);
    }

    /* Hero Section */
    .hero {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      padding: 4rem 2rem;
      background: var(--gradient-hero);
      position: relative;
      overflow: hidden;
    }

    body.dark-mode .hero {
      background: linear-gradient(135deg, rgba(0, 200, 192, 0.05), rgba(255, 92, 162, 0.05));
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: 
        radial-gradient(circle at 20% 80%, rgba(0, 200, 192, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 92, 162, 0.1) 0%, transparent 50%);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 800px;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 5vw, 4rem);
      font-weight: 700;
      margin-bottom: 1.5rem;
      background: var(--gradient-mixed);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
      animation: fadeInUp 0.8s ease-out;
    }

    .hero p {
      font-size: clamp(1.1rem, 2.5vw, 1.3rem);
      margin-bottom: 2.5rem;
      color: var(--text-dark);
      opacity: 0.8;
      animation: fadeInUp 0.8s ease-out 0.2s both;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    body.dark-mode .hero p {
      color: var(--text-light);
    }

    .cta {
      background: var(--gradient-mixed);
      color: white;
      padding: 1.2rem 2.5rem;
      border: none;
      font-size: 1.1rem;
      font-weight: 600;
      border-radius: 50px;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: var(--shadow-light);
      text-decoration: none;
      display: inline-block;
      animation: fadeInUp 0.8s ease-out 0.4s both;
      position: relative;
      overflow: hidden;
    }

    body.dark-mode .cta {
      box-shadow: var(--shadow-dark);
    }

    .cta::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.5s;
    }

    .cta:hover::before {
      left: 100%;
    }

    .cta:hover {
      transform: translateY(-3px) scale(1.05);
      box-shadow: 0 15px 30px -5px rgba(255, 92, 162, 0.4);
    }

    /* Footer */
    footer {
      background: var(--gradient-primary);
      color: white;
      text-align: center;
      padding: 1.5rem 2rem;
      font-weight: 500;
    }

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

    @keyframes float {
      0%, 100% {
        transform: translateY(0px);
      }
      50% {
        transform: translateY(-10px);
      }
    }

    /* Floating elements */
    .hero::after {
      content: '';
      position: absolute;
      width: 100px;
      height: 100px;
      background: var(--gradient-mixed);
      border-radius: 50%;
      top: 10%;
      right: 10%;
      opacity: 0.1;
      animation: float 6s ease-in-out infinite;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
      }

      .header-controls {
        width: 100%;
        justify-content: center;
      }

      .toggle-lang, .toggle-mode {
        flex: 1;
        text-align: center;
      }

      .hero {
        padding: 3rem 1rem;
      }

      .cta {
        width: 100%;
        max-width: 300px;
      }
    }

    @media (max-width: 480px) {
      .header-controls {
        flex-direction: column;
      }

      .toggle-lang, .toggle-mode {
        width: 100%;
      }
    }

    /* Loading state */
    .loading {
      opacity: 0.5;
      transition: opacity 0.3s ease;
    }

    /* Smooth transitions for theme switching */
    *, *::before, *::after {
      transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    }