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

      body {
        font-family: "Inter", sans-serif;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        min-height: 100vh;
        color: #333;
        overflow-x: hidden;
      }

      /* Animated Background */
      .bg-animation {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      }

      .bg-animation::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
        animation: float 20s ease-in-out infinite;
      }

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

      /* Header */
      .header {
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        padding: 1rem 0;
        position: sticky;
        top: 0;
        z-index: 100;
      }

      .header-content {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 2rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
      }

      .logo {
        display: flex;
        align-items: center;
        gap: 1rem;
        color: white;
        text-decoration: none;
      }

      .logo-icon {
        width: 50px;
        height: 50px;
        background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: white;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
      }

      .logo-text {
        font-size: 1.5rem;
        font-weight: 700;
        background: linear-gradient(45deg, #fff, #f0f0f0);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
      }

      .nav-links {
        display: flex;
        gap: 2rem;
        list-style: none;
      }

      .nav-links a {
        color: rgba(255, 255, 255, 0.9);
        text-decoration: none;
        font-weight: 500;
        transition: all 0.3s ease;
        padding: 0.5rem 1rem;
        border-radius: 8px;
      }

      .nav-links a:hover {
        background: rgba(255, 255, 255, 0.1);
        color: white;
      }

      /* Main Container */
      .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 2rem;
      }

      /* Hero Section */
      .hero {
        text-align: center;
        padding: 4rem 0;
        color: white;
      }

      .hero h1 {
        font-size: 3.5rem;
        font-weight: 700;
        margin-bottom: 1rem;
        background: linear-gradient(45deg, #fff, #f0f0f0);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        animation: slideInUp 1s ease-out;
      }

      .hero p {
        font-size: 1.2rem;
        margin-bottom: 2rem;
        opacity: 0.9;
        animation: slideInUp 1s ease-out 0.2s both;
      }

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

      /* Download Section */
      .download-section {
        background: rgba(255, 255, 255, 0.95);
        border-radius: 24px;
        padding: 3rem;
        margin: 2rem 0;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.3);
        animation: slideInUp 1s ease-out 0.4s both;
      }

      .download-form {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
      }

      .form-group {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
      }

      .form-group label {
        font-weight: 600;
        color: #333;
        font-size: 0.9rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
      }

      .url-input-container {
        position: relative;
      }

      .url-input {
        width: 100%;
        padding: 1rem 1rem 1rem 3rem;
        border: 2px solid #e1e5e9;
        border-radius: 16px;
        font-size: 1rem;
        transition: all 0.3s ease;
        background: white;
      }

      .url-input:focus {
        outline: none;
        border-color: #667eea;
        box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
      }

      .url-input-icon {
        position: absolute;
        left: 1rem;
        top: 50%;
        transform: translateY(-50%);
        color: #666;
        font-size: 1.1rem;
      }

      .options-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
      }

      .select-container {
        position: relative;
      }

      .custom-select {
        width: 100%;
        padding: 1rem;
        border: 2px solid #e1e5e9;
        border-radius: 16px;
        font-size: 1rem;
        background: white;
        cursor: pointer;
        transition: all 0.3s ease;
      }

      .custom-select:focus {
        outline: none;
        border-color: #667eea;
        box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
      }

      .download-btn {
        background: linear-gradient(45deg, #667eea, #764ba2);
        color: white;
        border: none;
        padding: 1.2rem 2rem;
        border-radius: 16px;
        font-size: 1.1rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        margin-top: 1rem;
      }

      .download-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
      }

      .download-btn:disabled {
        opacity: 0.8;
        cursor: not-allowed;
        transform: none;
        background: linear-gradient(90deg, #667eea, #764ba2, #667eea);
        background-size: 200% 100%;
        animation: loading-shimmer 1.5s infinite linear;
      }

      @keyframes loading-shimmer {
        0% {
          background-position: 200% 0;
        }
        100% {
          background-position: -200% 0;
        }
      }

      .download-btn .loader-text {
        display: flex;
        align-items: center;
        gap: 10px;
      }


      /* Platforms Section */
      .platforms-section {
        background: rgba(255, 255, 255, 0.95);
        border-radius: 24px;
        padding: 3rem;
        margin: 2rem 0;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.3);
      }

      .section-title {
        text-align: center;
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 1rem;
        background: linear-gradient(45deg, #667eea, #764ba2);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
      }

      .section-subtitle {
        text-align: center;
        font-size: 1.1rem;
        color: #666;
        margin-bottom: 3rem;
      }

      .platforms-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 2rem;
        margin-bottom: 3rem;
      }

      .platform-card {
        background: white;
        border-radius: 16px;
        padding: 2rem;
        text-align: center;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        transition: all 0.3s ease;
        border: 1px solid rgba(0, 0, 0, 0.05);
      }

      .platform-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
      }

      .platform-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
        display: block;
      }

      .platform-name {
        font-weight: 600;
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
        color: #333;
      }

      .platform-description {
        font-size: 0.9rem;
        color: #666;
        line-height: 1.4;
      }

      /* How it Works Section */
      .how-it-works {
        background: rgba(255, 255, 255, 0.95);
        border-radius: 24px;
        padding: 3rem;
        margin: 2rem 0;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.3);
      }

      .steps-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 2rem;
      }

      .step-card {
        background: white;
        border-radius: 16px;
        padding: 2rem;
        text-align: center;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        position: relative;
        border: 1px solid rgba(0, 0, 0, 0.05);
      }

      .step-number {
        position: absolute;
        top: -15px;
        left: 50%;
        transform: translateX(-50%);
        background: linear-gradient(45deg, #667eea, #764ba2);
        color: white;
        width: 30px;
        height: 30px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 600;
        font-size: 0.9rem;
      }

      .step-icon {
        font-size: 2.5rem;
        margin: 1rem 0;
        color: #667eea;
      }

      .step-title {
        font-weight: 600;
        font-size: 1.2rem;
        margin-bottom: 1rem;
        color: #333;
      }

      .step-description {
        color: #666;
        line-height: 1.5;
      }

      /* Features Section */
      .features-section {
        background: rgba(255, 255, 255, 0.95);
        border-radius: 24px;
        padding: 3rem;
        margin: 2rem 0;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.3);
      }

      .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2rem;
      }

      .feature-card {
        background: white;
        border-radius: 16px;
        padding: 2rem;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        border: 1px solid rgba(0, 0, 0, 0.05);
      }

      .feature-icon {
        font-size: 2rem;
        color: #667eea;
        margin-bottom: 1rem;
      }

      .feature-title {
        font-weight: 600;
        font-size: 1.2rem;
        margin-bottom: 1rem;
        color: #333;
      }

      .feature-description {
        color: #666;
        line-height: 1.5;
      }

      /* Alert */
      .alert {
        padding: 1rem 1.5rem;
        border-radius: 12px;
        margin: 1rem 0;
        display: none;
        align-items: center;
        gap: 0.5rem;
      }

      .alert.success {
        background: rgba(34, 197, 94, 0.1);
        color: #16a34a;
        border: 1px solid rgba(34, 197, 94, 0.2);
      }

      .alert.danger {
        background: rgba(239, 68, 68, 0.1);
        color: #dc2626;
        border: 1px solid rgba(239, 68, 68, 0.2);
      }

      /* Toast Notifications */
      .toast-container {
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 1000;
      }

      .toast {
        background: white;
        border-radius: 12px;
        padding: 1rem 1.5rem;
        margin-bottom: 1rem;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
        border-left: 4px solid #667eea;
        display: flex;
        align-items: center;
        gap: 1rem;
        min-width: 300px;
        animation: slideInRight 0.3s ease-out;
      }

      .toast.success {
        border-left-color: #22c55e;
      }

      .toast.error {
        border-left-color: #ef4444;
      }

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

      /* Footer */
      .footer {
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(20px);
        border-top: 1px solid rgba(255, 255, 255, 0.2);
        padding: 2rem 0;
        text-align: center;
        color: rgba(255, 255, 255, 0.8);
        margin-top: 4rem;
      }

      /* Responsive */
      @media (max-width: 768px) {
        .hero h1 {
          font-size: 2.5rem;
        }

        .options-grid {
          grid-template-columns: 1fr;
        }

        .platforms-grid {
          grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        }

        .steps-container {
          grid-template-columns: 1fr;
        }

        .nav-links {
          display: none;
        }

        .container {
          padding: 1rem;
        }

        .download-section,
        .platforms-section,
        .how-it-works,
        .features-section {
          padding: 2rem;
        }
      }