body {
         font-family: 'Vazir', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
         line-height: 1.6;
         color: var(--text-dark);
         background: linear-gradient(135deg, #ff4757 0%, #2f3542 100%);
         min-height: 100dvh;
         display: flex;
         flex-direction: column;
         justify-content: center;
         align-items: center;
         padding: 1rem;
     }

     .error-container {
         background: var(--white-color);
         border-radius: 1.5rem;
         box-shadow: var(--shadow-large);
         padding: 3rem 2rem;
         text-align: center;
         max-width: 600px;
         width: 100%;
         position: relative;
         overflow: hidden;
     }

     .error-container::before {
         content: '';
         position: absolute;
         top: 0;
         right: 0;
         width: 100%;
         height: 5px;
         background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
     }

     .error-icon {
         font-size: 6rem;
         color: var(--primary-color);
         margin-bottom: 1.5rem;
         animation: bounce 2s infinite;
     }

     @keyframes bounce {

         0%,
         20%,
         50%,
         80%,
         100% {
             transform: translateY(0);
         }

         40% {
             transform: translateY(-20px);
         }

         60% {
             transform: translateY(-10px);
         }
     }

     .error-title {
         font-size: 8rem;
         font-weight: 900;
         color: var(--primary-color);
         line-height: 1;
         margin-bottom: 1rem;
         text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.1);
     }

     .error-subtitle {
         font-size: 2rem;
         font-weight: 700;
         margin-bottom: 1.5rem;
         color: var(--text-dark);
     }

     .error-description {
         font-size: 1.1rem;
         color: var(--text-muted);
         margin-bottom: 2.5rem;
         line-height: 1.8;
     }

     .error-actions {
         display: flex;
         gap: 1rem;
         justify-content: center;
         flex-wrap: wrap;
         margin-bottom: 2rem;
     }

     .btn {
         display: inline-flex;
         align-items: center;
         gap: 0.5rem;
         padding: 0.75rem 1.5rem;
         border-radius: 2rem;
         text-decoration: none;
         font-weight: 600;
         transition: var(--transition);
         border: 2px solid transparent;
         cursor: pointer;
     }

     .btn-primary {
         background: var(--primary-color);
         color: var(--white-color);
     }

     .btn-primary:hover {
         background: var(--secondary-color);
         transform: translateY(-3px);
         box-shadow: var(--shadow-light);
     }

     .btn-outline {
         background: transparent;
         color: var(--primary-color);
         border-color: var(--primary-color);
     }

     .btn-outline:hover {
         background: var(--primary-color);
         color: var(--white-color);
         transform: translateY(-3px);
         box-shadow: var(--shadow-light);
     }

     .gym-equipment {
         display: flex;
         justify-content: center;
         gap: 2rem;
         margin-top: 2rem;
         opacity: 0.7;
     }

     .equipment-item {
         font-size: 1.5rem;
         animation: float 3s ease-in-out infinite;
     }

     .equipment-item:nth-child(2) {
         animation-delay: 0.5s;
     }

     .equipment-item:nth-child(3) {
         animation-delay: 1s;
     }

     @keyframes float {

         0%,
         100% {
             transform: translateY(0);
         }

         50% {
             transform: translateY(-10px);
         }
     }

     .logo {
         font-size: 2rem;
         font-weight: 700;
         color: var(--white-color);
         margin-bottom: 2rem;
         text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
     }

     .logo span {
         color: var(--primary-color);
     }


     @media (max-width: 768px) {
         .error-title {
             font-size: 6rem;
         }

         .error-subtitle {
             font-size: 1.5rem;
         }

         .error-actions {
             flex-direction: column;
             align-items: center;
         }

         .btn {
             width: 100%;
             max-width: 250px;
             justify-content: center;
         }
     }

     @media (max-width: 480px) {
         .error-title {
             font-size: 4rem;
         }

         .error-icon {
             font-size: 4rem;
         }

         .error-container {
             padding: 2rem 1.5rem;
         }
     }