@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap');
  
  * { font-family: 'Poppins', sans-serif; box-sizing: border-box; }
  
  :root {
    --red: #E53935;
    --red-dark: #B71C1C;
    --yellow: #FFD54F;
    --yellow-dark: #FF8F00;
    --green: #43A047;
    --green-dark: #1B5E20;
    --bg: #0a0a0a;
    --card: #141414;
    --border: rgba(229, 57, 53, 0.2);
  }
  
  html { scroll-behavior: smooth; }
  body { background: var(--bg); color: #fff; overflow-x: hidden; }
  
  .gradient-red { background: linear-gradient(135deg, #E53935 0%, #B71C1C 100%); }
  .gradient-yellow { background: linear-gradient(135deg, #FFD54F 0%, #FF8F00 100%); }
  .gradient-green { background: linear-gradient(135deg, #43A047 0%, #1B5E20 100%); }
  .gradient-dark { background: linear-gradient(145deg, #1a1a1a 0%, #0a0a0a 100%); }
  .gradient-card { background: linear-gradient(145deg, #1a1a1a 0%, #0f0f0f 100%); }
  
  .text-gradient { 
    background: linear-gradient(135deg, #E53935 0%, #FFD54F 100%); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
    background-clip: text;
  }
  
  /* Auth Background */
  .auth-bg {
    background: radial-gradient(ellipse at top, #1a1a2e 0%, #0a0a0a 70%);
    position: relative;
    min-height: 100vh;
  }
  .auth-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
      radial-gradient(circle at 20% 50%, rgba(229, 57, 53, 0.15) 0%, transparent 50%),
      radial-gradient(circle at 80% 50%, rgba(255, 213, 79, 0.1) 0%, transparent 50%);
    pointer-events: none;
  }
  
  /* Sidebar */
  .sidebar {
    background: linear-gradient(180deg, #0f0f0f 0%, #1a1a1a 100%);
    border-right: 1px solid rgba(229, 57, 53, 0.2);
  }
  
  .nav-item {
    transition: all 0.3s;
    border-left: 3px solid transparent;
    cursor: pointer;
  }
  .nav-item:hover, .nav-item.active {
    background: rgba(229, 57, 53, 0.1);
    border-left-color: #E53935;
    color: #E53935;
  }
  
  /* Buttons */
  .btn-primary {
    background: linear-gradient(135deg, #E53935 0%, #B71C1C 100%);
    transition: all 0.3s;
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(229, 57, 53, 0.4);
  }
  
  .btn-secondary {
    background: linear-gradient(135deg, #FFD54F 0%, #FF8F00 100%);
    color: #000;
    transition: all 0.3s;
  }
  .btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 213, 79, 0.4);
  }
  
  /* Inputs */
  .input-field {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s;
    color: white;
  }
  .input-field:focus {
    border-color: #E53935;
    outline: none;
    box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.15);
  }
  
  /* Upload Zone */
  .upload-zone {
    border: 2px dashed rgba(229, 57, 53, 0.3);
    transition: all 0.3s;
    cursor: pointer;
  }
  .upload-zone:hover, .upload-zone.dragover {
    border-color: #E53935;
    background: rgba(229, 57, 53, 0.05);
  }
  
  /* Tabs */
  .tab-btn {
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
    cursor: pointer;
  }
  .tab-btn.active {
    color: #E53935;
    border-bottom-color: #E53935;
  }
  
  /* Mobile menu */
  .mobile-menu {
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
  }
  .mobile-menu.open { transform: translateX(0); }
  
  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
  }
  .float { animation: float 6s ease-in-out infinite; }
  
  @keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(229, 57, 53, 0.5); }
    50% { box-shadow: 0 0 40px rgba(229, 57, 53, 0.8); }
  }
  .pulse-glow { animation: pulse-glow 2s ease-in-out infinite; }
  
  @keyframes spin { to { transform: rotate(360deg); } }
  .spin { animation: spin 1s linear infinite; }
  
  /* Scrollbar */
  .scrollbar-hide::-webkit-scrollbar { display: none; }
  .scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
  
  /* Video Card */
  .video-card {
    background: linear-gradient(145deg, #1a1a1a 0%, #0f0f0f 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s;
  }
  .video-card:hover {
    border-color: #FFD54F;
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(255, 213, 79, 0.15);
  }
  
  /* Stat Card */
  .stat-card {
    background: linear-gradient(145deg, #1a1a1a 0%, #0f0f0f 100%);
    border: 1px solid rgba(229, 57, 53, 0.2);
    transition: all 0.3s;
  }
  .stat-card:hover {
    transform: translateY(-5px);
    border-color: #E53935;
    box-shadow: 0 10px 40px rgba(229, 57, 53, 0.2);
  }
  
  /* Payment Step */
  .step-indicator {
    transition: all 0.3s;
  }
  .step-indicator.active {
    background: #E53935;
    color: white;
  }
  .step-indicator.completed {
    background: #43A047;
    color: white;
  }
  
  /* Pricing Card */
  .pricing-card {
    transition: all 0.3s;
    cursor: pointer;
    border: 2px solid transparent;
  }
  .pricing-card:hover, .pricing-card.selected {
    border-color: #E53935;
    transform: translateY(-5px);
  }
  .pricing-card.selected {
    background: rgba(229, 57, 53, 0.1);
  }
  
  /* Payment Method */
  .payment-method {
    transition: all 0.3s;
    border: 2px solid rgba(255,255,255,0.1);
    cursor: pointer;
  }
  .payment-method:hover, .payment-method.selected {
    border-color: #FFD54F;
    background: rgba(255, 213, 79, 0.1);
  }
  
  /* FAQ */
  .faq-item { border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
  .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
  .faq-item.active .faq-answer { max-height: 300px; }
  .faq-item.active .faq-icon { transform: rotate(45deg); }
  
  /* Responsive 4K/8K */
  @media (min-width: 2560px) {
    html { font-size: 18px; }
    .max-container { max-width: 2400px; }
  }
  @media (min-width: 3840px) {
    html { font-size: 22px; }
    .max-container { max-width: 3200px; }
  }
  @media (min-width: 7680px) {
    html { font-size: 30px; }
    .max-container { max-width: 6000px; }
  }
  
  /* Hide/Show */
  .hidden-section { display: none !important; }
  .visible-section { display: block; }
  
  /* Badge */
  .badge { display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; }
  .badge-success { background: rgba(67, 160, 71, 0.2); color: #43A047; }
  .badge-warning { background: rgba(255, 213, 79, 0.2); color: #FFD54F; }
  .badge-danger { background: rgba(229, 57, 53, 0.2); color: #E53935; }
  .badge-info { background: rgba(59, 130, 246, 0.2); color: #3B82F6; }