*{margin:0;padding:0;box-sizing:border-box;font-family:Arial,sans-serif}:root{--primary: #1a237e;--secondary: #ab9008;--accent: #ff8340;--dark: #051475;--light: #f5f5f5}body{background:linear-gradient(135deg,#0d1440,#1a237e);color:#fff;overflow-x:hidden;min-height:100vh}#particles-js{position:fixed;width:100%;height:100%;z-index:-1}.navbar{position:fixed;top:0;width:100%;padding:1rem 5%;background:#0d1440f2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:1000;display:flex;justify-content:space-between;align-items:center;transition:all .3s ease}.navbar.scrolled{padding:.5rem 5%;background:#0d1440fa}.logo{display:flex;align-items:center;gap:10px;cursor:pointer}.logo-text{font-size:1.5rem;font-weight:700;background:linear-gradient(45deg,var(--secondary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.nav-links{display:flex;gap:2rem}.nav-links a{color:#fff;text-decoration:none;padding:.5rem 1rem;border-radius:25px;transition:all .3s 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#ab90084d}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.error-message{color:#ff6b6b;background:#ff6b6b1a;padding:.75rem;border-radius:8px;margin-bottom:1rem;border:1px solid rgba(255,107,107,.3)}.success-message{color:#51cf66;background:#51cf661a;padding:.75rem;border-radius:8px;margin-bottom:1rem;border:1px solid rgba(81,207,102,.3)}@media (max-width: 768px){.tab-buttons{flex-direction:column;width:100%}.tab-button{width:100%;margin-bottom:.5rem}.packages-grid{grid-template-columns:1fr}.payment-methods{flex-direction:column}.payment-method-btn{width:100%}}.tab-container{margin-bottom:3rem}.tab-buttons{display:inline-flex;background:#ffffff1a;border-radius:50px;padding:.5rem}.tab-button{padding:12px 30px;border:none;border-radius:25px;background:transparent;color:#fff;cursor:pointer;transition:all .3s 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1rem;border-radius:20px;font-size:.8rem;font-weight:700}.quality-low{background:#666}.quality-medium{background:var(--secondary)}.quality-high{background:var(--accent)}@media (max-width: 768px){.tab-buttons{flex-direction:column;width:100%}.tab-button{width:100%;margin-bottom:.5rem}.packages-grid{grid-template-columns:1fr}.payment-methods{flex-direction:column}.payment-method-btn{width:100%}.card-details>div{grid-template-columns:1fr}}