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

        body {
            font-family: 'Vazir', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .auth-container {
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(46, 59, 78, 0.1);
            padding: 40px;
            width: 100%;
            max-width: 450px;
            position: relative;
            overflow: hidden;
        }

        .auth-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: linear-gradient(90deg, #2e3b4e, #4a5568, #2e3b4e);
        }

        .auth-container h2 {
            color: #2e3b4e;
            text-align: center;
            margin-bottom: 30px;
            font-size: 28px;
            font-weight: 700;
            position: relative;
        }

        .auth-container h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: linear-gradient(90deg, #2e3b4e, #4a5568);
            border-radius: 2px;
        }

        .alert {
            padding: 15px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-size: 14px;
            border: none;
            animation: slideIn 0.3s ease-out;
        }

        .alert-danger {
            background: linear-gradient(135deg, #ff6b6b, #ee5a6f);
            color: white;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
        }

        .form-group {
            margin-bottom: 25px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #2e3b4e;
            font-weight: 600;
            font-size: 14px;
        }

        input[type="text"] {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: #f8fafc;
            color: #2e3b4e;
        }

        input[type="text"]:focus {
            outline: none;
            border-color: #2e3b4e;
            background: white;
            box-shadow: 0 0 0 3px rgba(46, 59, 78, 0.1);
            transform: translateY(-2px);
        }

        .btn {
            width: 100%;
            padding: 15px;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #2e3b4e, #4a5568);
            color: white;
            box-shadow: 0 8px 20px rgba(46, 59, 78, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 25px rgba(46, 59, 78, 0.4);
        }

        .btn-primary:active {
            transform: translateY(-1px);
        }

        .switch-auth {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #e2e8f0;
            color: #64748b;
            font-size: 14px;
        }

        .switch-auth a {
            color: #2e3b4e;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            position: relative;
        }

        .switch-auth a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: #2e3b4e;
            transition: width 0.3s ease;
        }

        .switch-auth a:hover::after {
            width: 100%;
        }

        .switch-auth a:hover {
            color: #1a202c;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .auth-container {
            animation: fadeInUp 0.6s ease-out;
        }

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

        /* Responsive */
        @media (max-width: 480px) {
            .auth-container {
                padding: 30px 20px;
                margin: 10px;
            }
            
            .auth-container h2 {
                font-size: 24px;
            }
        }

        /* Loading state */
        .btn-primary:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
        }

        /* خطوط تزیینی */
        .auth-container::after {
            content: '';
            position: absolute;
            bottom: -10px;
            right: -10px;
            width: 100px;
            height: 100px;
            background: linear-gradient(45deg, #2e3b4e, transparent);
            border-radius: 50%;
            opacity: 0.05;
        }