body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            font-family: 'Vazir', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        .login-container {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
            padding: 40px;
            width: 100%;
            max-width: 450px;
            backdrop-filter: blur(10px);
        }
        
        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .login-header h2 {
            color: #333;
            font-weight: bold;
            margin-bottom: 10px;
        }
        
        .login-header p {
            color: #666;
            font-size: 14px;
        }
        
        .form-label {
            font-weight: 600;
            color: #444;
            margin-bottom: 8px;
            display: block;
        }
        
        .form-control {
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            padding: 12px 15px;
            font-size: 16px;
            transition: all 0.3s ease;
            text-align: center;
        }
        
        .form-control:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }
        
        .btn-login {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border: none;
            border-radius: 10px;
            color: white;
            padding: 12px;
            font-size: 16px;
            font-weight: 600;
            width: 100%;
            transition: all 0.3s ease;
            margin-top: 20px;
        }
        
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 14px rgba(102, 126, 234, 0.3);
        }
        
        .btn-login:active {
            transform: translateY(0);
        }
        
        .forgot-password {
            text-align: center;
            margin-top: 20px;
        }
        
        .forgot-password a {
            color: #667eea;
            text-decoration: none;
            font-size: 14px;
        }
        
        .forgot-password a:hover {
            text-decoration: underline;
        }
        
        .error-message {
            background-color: #fee;
            border: 1px solid #fcc;
            color: #c00;
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 20px;
            text-align: center;
            display: none;
        }
        
        .logo {
            text-align: center;
            margin-bottom: 20px;
        }
        
        .logo img {
            max-width: 80px;
            height: auto;
        }
        
        /* استایل برای دکمه‌های عددی روی موبایل */
        input[type="text"][inputmode="numeric"],
        input[type="password"][inputmode="numeric"] {
            font-family: monospace;
            letter-spacing: 2px;
        }